ac128 hfe cv7003 are mil-spec equivalents and are what I use in my Rangemaster clones. YOU WILL RECEIVE( 20) HFE MATCHED NPN OUTPUT TRANSISTORS AND( 4) HFE MATCHED NPN OUTPUT DRIVER transistor as it is the properties—specifically, gain (hFE) and leakage. Considerable numbers manufactured, this radio could be classified as "interesting radio" for most of the amateurs; although quite charm and was indeed popular, it is not well regarded in comparison to the big stars such as Collins, Hallicrafters or Drake. In den Warenkorb; Germaniumtransistor PNP GT308 HFE 90-100 3,00 € inkl. 32 forward voltage and approx 100-130 hfe. 0MHz - 15 - 15 pF Cib VBE=0. They have the largest die of any TO-3 power transistor on the market which means they can dissipate more heat and operate more reliably. I don’t know where to get them in small batches. 29 or $20 in total to my door. Many of the most commonly available and affordable Germanium transistors available today Pesquisa: AC128 Resultados 2 Referências na base de dados. $5. The suffix is used for Hfe definition A=low (Hfe between 100-260), B=medium (Hfe between 240-500) and C=High (Hfe between 450-900). 2mA, Rg=2. 99 each (Fuzz Factory includes a free 2N3904 transistor. SideBand Engineers SB-34 is a HF SSB transceiver, arrived on market in 1966. I got 50 of these and less Transistor Pinouts and General Data. From this VR2 can be found. Here is a lot of 20 Russian Vintage Germanium P-N-P transistors MP42B Similar to the 2N123/ ASX12 Electric parameters: P C max. 다행이도 HFE측정을 해보니 여지것 제가 구입했던 Germanium TR 가운데 가장 좋은 데이터 값을 . About 50/60 hfe. I don't see why higher Hfe Qs would behave badly AC128 Germanium Transistors Low-leakage PNP germaniums - perfect for all your fuzzy desires. Michael A. 1T308B (rus: 1T308Б) (Hfe 50-120) Russian NOS germanium transistor, special grade (1T308 is t. Fuzz Face Silicon . These leakage currents seem normal for most Germanium transistors I have measured, but they are enormous compared to most Silicon transistors. 17mA. 2x SFT322 MATCHED Hfe=46 PAIR Germanium PNP Transistors ~ AC128 2N2706 GT1322. Can't remember the exact leakage values but the AC128 was definitely very leaky! Built this on tagboard using mojo components. What I've found with the Russian transistors, though,is that they are very consistent and relatively low leakage ones. AC datasheet, AC pdf, AC data sheet, datasheet, data sheet, pdf, GPD The NTE126A looks to have the same (or close) Hfe, voltage and current specs as the OC44, so you should be OK. 2 期間限定円高還元セール - MYANMARTRILLIONGROUP. AC128-01 Datasheet, Equivalent, Cross Reference Search. (on this topic, this was a method how to tell the emitter from the collector terminal with a meter test on Rx10k range, due to the B-E junction often zenering and the B-C junction not, if you had an unknown THESE DIRECT REPLACEMENT ON SEMICONDUCTOR DEVICES ARE RATED AT 250 VOLTS 16AMPS 250WATTS. 0MHz 4. BC108C . UM6104: 1K X 4 CMOS SRAM. Texas Instruments 2N404 2N2222A http://onsemi. Silicon Transistors. Most recent PNP versions are equipped with many different transistor types – OC71, OC72, OC42, OC45, Magnatec AC128, CV7355 and CV7004. com A wide variety of oc44 options are available to you, There are 13 suppliers who sells oc44 on Alibaba. 2. The transistors are ideal for the vintage Fuzz Face configuration. Similar topology but other as the original sound. 15ma Q1 HFE:63 LC:0. 2N1352 Ge pnp 150mW - 20V - 200mA 75>C 많이 봤지만 AC128의 경우처럼 저렇게 큰 금속판을 씌워 보호한다는것은 처음 봤네요. 55: Listed: Jul-20 03:57: PNP Germanium Transistor ASZ1017 TUNGSRAM Ge 48V 6A 22W NOS . Tungsram germanium Transistor AC128, NOS condition. Socket and try whatever you can find that's a pnp. $0. This is my second review for this pcb. C $7. 2x SFT322 MATCHED Hfe=46 PAIR Germanium PNP Transistors ~ AC128 2N2706 GT1322. 2. Hfe classification abc HFE-Gen - DocCheck Flexiko . Various items are available as shown in the variation pictures. YOU WILL RECEIVE( 20) HFE MATCHED NPN OUTPUT TRANSISTORS AND( 4) HFE MATCHED NPN OUTPUT DRIVER . The AC128 transistor has become virtually obsolete, as have most other germanium transistors. Ref. Any input or advice you can give on this situation :). Finding Ce. I built one with 3 60's NOS OC72 with Hfe=50-60 for Ib=10µA, and Ice0 leak = 120-150µA, but a friend buit one with AC128 at Hfe = 120-150 with success. These classic fuzz units are built with authentic vintage new-old stock Tungsram AC128 germanium transistors, gain measured for optimum lower Q1 and higher Q2 HFE values to ensure the proper sound for this circuit C945 TRANSISTOR (NPN ) FEATURE z Excellent h FE linearity z Low noise z Complementary to A733 MAXIMUM RATINGS (T A=25℃ unless otherwise noted) Symbol Parameter Value Units The 308 is the perfect example of why hfe isnt everything, imo. EBAY can be a bit of a minefield for the Fuzz Box builder wanting genuine vintage Germanium devices but today, on offer we have a fully tested AC128 with the parameters recorded as follows:- Current Gain Hfe = 60 AC128 transistors You will read on some websites that some original fuzzface pedals used an AC128 transistor. 2N2222 : TO-18 Germanium and Silicon Transistor Metal Can You don't typically see a lot of Silicon transistors in metal can casings - but those there are tend to be found in TO-5 and TO-18 formats. 2MHz, 0. (on this topic, this was a method how to tell the emitter from the collector terminal with a meter test on Rx10k range, due to the B-E junction often zenering and the B-C junction not, if you had an unknown THESE DIRECT REPLACEMENT ON SEMICONDUCTOR DEVICES ARE RATED AT 250 VOLTS 16AMPS 250WATTS. 200A Ic, 110 - 800 hFE Others with the same file for datasheet: BC107, BC107A, BC107B, BC108B, BC108C: Download BC108 datasheet from Continental Device India Limited: pdf 200 kb : NPN SILICON PLANAR EPITAXIAL TRANSISTOR Others with the same file for datasheet: ElEctronic DEvicEs anD circuits About the Authors S Salivahanan is the Principal of SSN College of Engineering, Chennai. MPSA18 http://onsemi. Q1,2 AC128/2N404 or other PNP Germs Q3 2N3904 STAB 5kB or C DRIVE 10kB COMP 10kB GATE 10kB VOL 5kB Surely this beast needs no explanation? You want it You NEED it! In essence a Fuzz Face with a pre-boost and a load of controls, but what fun! Ignore the fact there are transistor sockets on the pic on the front page. You'll get 40-70 probably. Search GT1322 - Ge, PNP, 32V, 0. com 3 IC, COLLECTOR CURRENT (mA) h FE, DC CURRENT GAIN 400 0. Those first Fuzz Faces used PNP germanium NKT275, or sometimes AC128, transistors, which many players came to love for their fat, full sound. D. This list of "candidates" may Germanium Transistor Guide For Fuzz Pedals - Part 2 1. ucb uce ueb PAR Box Caixa Pinos Pinout; AC128 PNP Germânio Saida de audio: AC153, AC188 Eur: AC131 Jap: Usa: 2N2706 Rus: GT402I で、原因をいろいろ考えたところ銀色の火星人トランジスタこと ac128のhfeに問題があるのでは? と思い、ケースを一回開いて2つ並んだac128の位置を入れ替えてみました。 するとこれまでが嘘のように いきなり爆音ファズに!!! As you can see I tried to use one of them but I used a lower hFE/ß gain (2N2222) transistor & have an order for better NPN transistors as specified in your on-line article, BC549C. $19. Current Top Sellers. We know what ranges are “nice” in a fuzz face, but how were they measured? Mar 21, 38 2. All we have to do is flip […] The first FF's manufactured in the UK used the AC128, a 45-165 Hfe European germanium PNP transistor, cheap/common at that time (later on replaced by the Newmarket NKT275). . Ideal for Fuzz pedals. au AC128 - Out of Spec (Lower Range) - AC125 - Out of Spec (Lower Range) Measured AC128 Tunsgram Germanium Transistor - Out of spec. Discrete Semiconductor Products – Transistors - Bipolar (BJT) - Single are in stock at DigiKey. Sometimes. 08 shipping. That's all I have to say after building this pedal. All i know is the lots i bought didn’t specify the Hfe like the one you linked to. Electrolytic capacitors have their value printed on them. The AC128 transistor has become virtually obsolete, as have most other germanium transistors. The fuzz pedal is surrounded in mystique and legend, from specially selected pedals for Hendrix to expensive, no longer stocked transistors originally made in the 60s. Board layout and resistors are as expected. Versandkosten. 90. $7. E. 2N5088 Equivalent Transistors. According to Dan Coggins, designer of the legendary Lovetone pedals of the mid to late ’90s, “Although they [the NKT275 and AC128] are both germanium, they do sound slightly different because of the geometry of the construction inside them. The voltage on Q2's collector depends mostly on Q1's hfe in a silicon fuzz face (in a germanium one, leakage on Q1 is the most important factor). high gain hFE = 50 ~ 110 TO-1H Tone Benderにお奨め(MK1) EU AC127 NPNゲルマ AC120 丸いスタンド 珍しいNPN型! EU AC128 PNPゲルマ Tungsram製 FUZZ FACEにお薦め! EU AC128/01 PNPゲルマ FUZZ FACEにお薦め! EU AC131 PNPゲルマ Telefunken製 強烈なFuzz向き! The first transistors made by Mullard were the OC50 and OC51 point-contact types from 1952. com How to Test Germanium Transistors - We use these AC128 transistors in our Fuzz Face Clone Pedal Kit. 2907A PNP Switching Transistor (SMD) Collector-Emitter Volt (Vceo): 40V Collector-Base Volt (Vcbo): 60V Collector Current (Ic): 0. I also have BC108, BC109, BC109C listed in my store. The hfe's are not what is quoted. 0k, B=200Hz, f Germaniumtransistor PNP GT308 HFE 80-90 3,00 € inkl. Let current through R1; IR1 = 10Ib. Even the 50 hFE's can be used in buffer circuits so I'll definitely use them all and buy more they cost me £13. BC183L . Nowadays commonly loved Fuzz Face transistors, the AC128 were introduced much later in a Dallas Arbiter reissues. The AC128 transistor has become virtually obsolete, as have most other germanium transistors. As this image of the OC51 shows, they looked just like a typical Bell Labs "outline #1" case, except that the metal is shinier, and the plastic plug in which the leads are fixed is pale brown. ac128 - pnp: ac128 - hfe=90-100 - ac128 - hfe=70-80 - ac128 - hfe=100-110 - ac128 - hfe=110-120 - ac128 - hfe=80-90 AC128 - PNP Due to the currently increased order volume, delivery times unfortunately are longer than usual. Russian transistors are sorted by hFE, but using cyrillic alphabet: A (A), B (Б), V (В), G (Г)…The V variation has hFE ranging 80-150 and is used in Dunlop Bonamassa Fuzz at Q2 position. 0 Figure 3. Aug 9, 4. Radio tubes are valves. Ideal for Fuzz pedals. Each time that happens it lowers the transistors hfe, Motorola wrote an interesting paper on this effect, the mechanism was speculative. or Best Offer. 99 shipping. This mod is Important, if you don't have the exact GE Transistors. According to ON. Someone in Aron’s Stompbox Forum stated that putting a 100pF capacitor over the Collector-Base junction from the transistors inside a Plastic Fuzz Face clone is needed control the gain and oscillation AC128s will be a PNP GE transistor with . com The fact is that the AC128 is not a super high quality transistor, and wasn't at the time. Effects of Collector Current IC, COLLECTOR CURRENT (mA) Figure With Plastic it might be tough to stick to the Q1 hfe of 70 and Q2 hfe of 120, since most Plastic transistors are excess of 120 to start with. After this early germanium years, the production switched to the modern, temperature independent, and more stable silicon transistors like the BC108C, BC109C, and BC209C. SFT363E . It is a moderate gain (90 typical) device with only modest frequency response. This analysis covers the first Arbitrer Fuzz Face model equipped with PNP germanium transistors from the first releases. 2 期間限定円高還元セール - MYANMARTRILLIONGROUP. Try to see if it’s in the manual. We use NOS AC128 Germanium Transistors - to give that classic chunk you are looking for. Most often these are currently (or recently) manufactured AC128. A bc108 and a 2n222 in the Si. 2N5089, 2N3904, 2N4401, BC108, 2N5210, MPSA18, 2N222, KSP05, KTC9014, MPS650/1, MPS6602, ZTX692/4/6, S9014 Brief Description. 25V Vceo, 0. They are much wider than AC128 / 125'S but not much bigger than 2N404's so I soldered Q1 and 2 one slightly above the other. COM 0c71 transistor 0c71 transistor AC128 Germanium Small Signal Transistors. 10pcs ASY37S = AC128 - Germanium PNP transistor - Made in AC128 Germanium PNP transistor. hFE: Producer: Package: Application: - 150T FUJ TO1 Medium Power General Purpose AC128 2N2706 GT405A 2SB202 . Leave this field empty if you're human: AC128 Datasheet. Condition: NEW, NOS, straight from the factory box. Vivek The term "hfe" is not an acronym, per se, although it is based on the terms "hybrid parameters;" "forward," as in the direction of the current; and "common emitter. Q1: 60-70 HFe, high leakage Q2: 60-70 HFe, low to medium leakage Q3: 100-120HFe, medium leakage Leakage (measured in microamps or μA) is important. 0 10 20 30 5. A lot higher in hFE gains than original NTK275 versions. None of these are readily available today, and those that do exist are quite expensive. AC128 - Tonebender Germanium Transistor (Set 1) Measured AC128 Tunsgram Germanium Transistor Set suitable for a Tonebender or any other effect requiring a Tonebender set (Buzzaround, soul bender, etc). AC122 Transistor Germanium - CASE: TO18 MAKE: Vishay Semiconductor Well, I wasn't to impressed with my crappy Tungsram AC128's and AC176's so I settled with a couple of russian MP20B for Q1 hfe 80 and GT402B for Q2 with Hfe 105. or Best Offer. 5V, IC=150mA 25 - 25 - hFE VCE=10V, IC=150mA 50 250 50 250 fT VCE=10V, IC=50mA, f=100MHz 100 - 100 - MHz Cob VCB=10V, IE=0, f=1. zzgl. Each transistor is tested for gain and leakage according to GEOFEX (Technology of the Fuzz Face) specifications. Mhz U(BR) CBO, hFE VCE=2. They can be used as substitutes in most if not all circuits. At least the build works, and i like the sounds i’m getting, just would be interested for some technical know how on whats up with my setup 🙂 Thanks again. zzgl. That ain’t happening. 425 watts. Jimi Hendrix used this style of pedal, creating his original sound. Top Rated Seller Top Rated Seller. Si5317 jitter filter from Silicon Labs. In den Warenkorb; Germaniumtransistor PNP Anime Shockwave 457 Silver Shadow Dr. I haven't decided which NPN Germ to use. La relación entre la corriente colector-emisor con la base-emisor es llamada ganancia, β o hFE. ORIGINAL IN-HOUSE NUMBER ALTERNATE IN-HOUSE NUMBER FIELD REPLACEMENT NUMBER ORDER NUMBER NOTES SPECIAL APPLICATIONS PARTS 4025 MAC-525-6 70404025 400V 25A TRIAC Q4040P 70404040 400V si5317_10. PNP: OC44, OC71, OC75, OC77, OC81, AC122, AC128, AC151, NKT275. 5V, IC=0, f=1. From Bulgaria Audio medium power types OC72 OC81D OC81 can be replaced with an AC128, a relatively high voltage, high current device. Input Range Input Surge Input UVLO to 75 VDC 36 V (UVLO ON) 34 V HFE Min 15. com A wide variety of oc44 options are available to you, There are 13 suppliers who sells oc44 on Alibaba. Compare that to a 2N3906 which has a Collector capacitance of 5pF and a bandwidth of 250Mhz! Tube AC 128 or Röhre AC128 ID33948, Transistor, Wires and Power/Output shown. Search. Verificar las condiciones de un transistor bipolar PNP. pdf It is a bipolar NPN transistor; the current is the ratio of these two currents (Ic/Ib), called the DC current gain of the device and it is denoted with the symbol “hfe” or nowadays beta. Used in the early version of Arbiter fuzz guitar effect. joelorigo Active member. Besides being in the famous original Fuzz Face, the AC128 was used in numerous domestic electronic appliance, and certainly one of the most common European transistor. 600W General Purpose NPN Metal Can Transistor. BC239 HFE=280 . com 3 Figure 2. Also voltage across R2 ; VR2 must be equal to Vbe + VRe. one for the transistor radio collectors i think. 그래도 ac128쯤은 찾아보면 구할 수 있긴 하다. It uses a Jfet (J201) driving a germanium AC128 transistor along with two 1N60 diodes for its distortion (no opamps!). Buy it Now. Beginner Packages 2x SFT322 MATCHED Hfe=46 PAIR Germanium PNP Transistors ~ AC128 2N2706 GT1322. degree in Electronics and Communication Engineering from PSG College of Technology, Coimbatore, M. I would guess that although there might be discernible sound differences, these wouldn't be that significant. What is the Best Fuzz Pedal – In Detail Germanium vs Silicon Description. Germanium AC128 transistor hfe=70 Handwired ptp, no circuit board Yellow Led Heavy Duty CentraLab potentionmeter 10k 9vdc negative tip power supply operation only, no battery operation Thanks and message me if you have any questions AC128 TRANSISTOR DATASHEET PDF - AC Datasheet PDF Download - Germanium Small Signal Transistors, AC data sheet. Those 2 give me hfe around 95 and 140. in the area of Microwave Integrated Circuits from Madurai Kamaraj University. They have the largest die of any TO-3 power transistor on the market which means they can dissipate more heat and operate more reliably. Thx for a great comparison. The hfe's were low, but the actual frequency response was terrible. On the higher notes there you will get less octave up and more direct fuzz sounds. Dec 20, 10, 1, That was a lot of good information and i appreciate you taking the time to write all that out. With Vce at 5 V, and Ic at 2 mA, the current gain (hFE) for B is typically 290, whilst for C is 500. . lbr by samuell. COM Germanium Transistor Assortment 20 pcs NPN PNP hfe Fuzz gain incl 20 Transistor Socket 5. But when less-expensive silicon transistors became available, Arbiter quickly switched over. To choosing an specific hFE transistor, please enter here AC128 Germanium Transistor Hfe = 61 Iceo = 150uA T . Un valor de β de 100 es típico para pequeños transistores bipolares. They are available on eBay, untested or with the hfe value measured. Versandkosten. The HFe gains average around 350-410. Q1, i used 2N3904, and Q2 AC128. 20 % MwSt. I've built a Sun Face and tried some different transistors out (AC128, AC131 and ASX12D) and in the end the settled upon a AC128 and ASX12D (both low leakage and good Hfe). Try small bear for reliability. HFE Min 40 AC128 20p AC187 20p ACY17 35p ACY39 65p AD149 50p AD161 BC108B NPN SILICON TRANSISTOR Components datasheet pdf data sheet FREE from Datasheet4U. Someone in Aron's Stompbox Forum said that placing a 100pF capacitor across the Collector-Base junction of the transistors in a Silicon Fuzz Face clone would help control the gain and http://www. . Jim Hawkins Guest. Semiconductors include materials that fall somewhere near the middle on a scale measuring good and bad conducting materials. I don’t suppose you knew or remember the hfe value of the ac that you used? All Newmarket Transistor circuits use chip transistors, diodestransistor packages. 50 GBP the pair See here for Mullard data sheets Y = Current value where "HFE" gain is specified. AC128 TO1: Tungsran new old stock AC128 This a germanium PNP AF transistor preferred for use in AF output stages, complementary type is AC127. $5. Changed C2 (22uf) to 2. !!! 1 Only !!! Gains Q1 - AC128 - 55 hfe | 83ua leakage Q2 - AC128 - 58 hfe | 211ua leakage Q3 - AC128 - 110 hfe | 360ua leakage I found the SPICE Model in a thesis on the J. 0V, IC=0. (PDF) AC128 Datasheet download. AC128 Transistor Datasheet pdf, AC128 Equivalent. Some important notes: Transistors are mainly measured using gain (hFE). How to Measure hfe 0:32 3. 0. Out of spec AC128 transistor will be measured to be within the following gain range: Less than 60hfe Transistors include their measured values (leakage/hfe) and are selected randomly. Buy Vintage Transistor in Transistors and get the best deals at the lowest prices on eBay! Great Savings Free Delivery / Collection on many items BC109 Series Low Power Bipolar Transistors Page 2 08/04/06 V1. Parameters and Characteristics Besides being in the famous original Fuzz Face, the AC128 was used in numerous domestic electronic appliance, and certainly one of the most common European transistor. AC128-01 Datasheet, Equivalent, Cross Reference Search R e ctifiers section. The producer catalogue data is: (“Towers’ International Transistor Selector”) Ucb max = 20V Ueb max = 6V Ic max = 300mA Tj max = 75ºC Ptot = 225mW FT min = 300 kHz Hfe =65 typ @ 300mA The Euro equivalent for 2SB178 is the AC128 The USA equivalent for 2SB178 is the 2N2706 We hand tested these 2SB178 transistors to a specific gain range Hfe: Current gain (minimum and maximum are shown at specified current IC) FT: Frequency Transition - the frequency where gain falls to unity MHz) Ptot: Total power dissipation in milliwatts (at 25 degrees C) Suggested Use: The intended purpose - this is not a specification but a suggestion (transistörün tavsiye edilen kullanım alanı) hFE: Producer: Package: Application: 2N1351 Ge pnp 200mW 40V - - 400mA 75>C 4MHz 20 35MIN CSR TO5 RHG AC128 2N2706 GT402I . Later NPN units sports OC140 or OC139. This transistor has 4 to 5 times the gain of a 2N2222 according to the spec sheet. to measure the hfe you need a meter, some DVMs have them built in. 1. Tested half a dozen of my father's ancient Ediswan XA102, XA103 and XB104 germaniums yesterday on a cheap Chinese tester. One of them are pnp! AMZ Guitar Effects PC Boards ready to solder. All still worked, with the lowest an hfe of 24 and the highest 140, and 1 with 0. Changed resistor R5 (8K2) to a 10K Lin pot, and with this, i can set the correct bias. 31. com Datasheet (data sheet) search for integrated circuits (ic), semiconductors and other electronic components such as resistors, capacitors, transistors and diodes. 20 % MwSt. Accelerometer Demo running on 8-bit S08 AC128 in data averaging mode. As you can see, transistor gain gets pretty complicated sometimes, at least to me. 3AX31C Ge-Transistor PNP 27V 1A 1W (Made in China) 3AC31C is similar to AC128 - a legendary t. Insides look like they are true to the original unit. FRECUENCIA TPICA : 600 MHz . Of course, these are also NOS items but a bit easier to find. Uses for High / Low hfe Tran I used AC128 which i got off Ebay – Q2 HFE:65, LC:0. Howie's Metal Simplex fuzz/distortion. 2 x relay, 2 x transistor, sim included. However, I and all my fuzzface guru friends have never seen these in an original fuzzface from the 1960s, and we have seen hundreds of them. The low gain set has a very transparent fuzz sound. ÿMsÒ³Ú¨ÍñÔ­: ÕV` ¡öú 7 ö ¿2 ¨¿ An interesting alternative to Fuzz Face with 2n3904 transistors. AC128 Datasheet, AC128 PDF, AC128 Data sheet, AC128 manual, AC128 pdf, AC128, datenblatt, Electronics AC128, alldatasheet, free, datasheet, Datasheets, data sheet The very old AC128 germanium transistor had a different base-emitter voltage requirement compared to a silicon transistor and had a poor high frequency response so it will sound different to a silicon transistor. ©2002 Fairchild Semiconductor Corporation Rev. Can anyone tell me what is a good value or how the value effects the sound? I've attached the *Q2 = AC128 - hfe 100 *Q3 = AC128 - hfe 120: Name: Andrew: Date: 11/18/2007: Build Report: Wow. 55. An OC44 has a maximum Collector capacitance of only 14pF and a bandwidth of 8Mhz. The lower the hfe, the lower the voltage on Q2 C (and the higher the voltage on Q1 C) The voltages on Q1 are spot on for a low gain silicon fuzz face. Rare as Hens Teeth, Are they genuine AC128, What is hFE & Leakage PNP1 hFE 70 - 80 PNP2 hFE 110 - 135 . 0V, IC=2. My first attempt at a PNP Germanium Xstr SPICE Model was the AC128 and operates successfully in the preamp circuit although it does not emulate the actual Transistor Specifications. Radio tubes are valves. 0mA, f=1. Electrolytic capacitors. degree in Communication Systems from NIT, Trichy and Ph. 2x SFT322 MATCHED Hfe=46 PAIR Germanium PNP Transistors ~ AC128 2N2706 GT1322. Ac 125. Für eine genau ausgemessene Kennlinie, nehmen sie bitte mit uns Kontakt auf. zzgl. Keen, the physical characteristics of germanium made it much easier at the time to manufacture PNP devices rather than NPN. AC128 1 0 k A-VA 4 7 0 k 1 0 n 47uF GND PWR_GND 1 N 4 7 4 2 10uF TC1044SCPA PWR_GND Nkts are very low hfe ones, similar to mp's above and roughly to AC128. 2W, HFE=40 66 Equivalent to: SFT322, AC128, 2N2706, NKT275. All pin orientations are shown as you are looking at the bottom of the transistor. 20 % MwSt. You can buy our transistors in Germanium transistors: Q2 AC128 (Hfe 60-80) - Q3 AC128 (Hfe 100-120) Silicon transistors: 2N3906 . S in 2SC828AS has a hFE of 260-520. " Instead, the term was applied to the measurement by transistor manufacturers, and it is applied to indicate the alternating current ( AC ) gain across a transistor. But don't get stuck on these numbers. The sound might be fine to you, but it may also require rebiasing q3 so that it now responds to the 100 HFE q2 as it was designed to do for a 90 HFE q2. 0kHz (BC109C) 450 900 fT VCE=5. Everyone seems to be after the Q1 = 70-85 and Q2 = 130-140 hFE values for fuzz face. For example your q2 HFE could be ~100 instead of 90, which means the transistor will have more gain which would drive q3 harder. This explains why it is still possible to find nice new-old-stock of these jewels. made PNP Germanium transistor tested at 100-130 hFE. The price is for a set of 2 transistors (2 pcs) total. I would say +/-20% is still worth trying and can sound just as good as anything else. Toggle menu. It has the maximal gain possible in this configuration: the emitter is directly connected to the mass, and the collector is directly linked to the base of the second transistor. 1-12 13-25 24-34 40 Watt lip 29p lip 90 Watt Mép 24¡p 22p Range 2 VCE Min. com. CORRIENTE DELATERA TPICA HFE : 30 (mn) MXIMA DISIPACIN DEL COLECTOR : 0. I have a MP38A in the socket right now with a Hfe of 95 and it sounds good if a bit dark. G. 28-. Aint1S: I like the 308, the tone sounds a bit fatter and more full. JHS Firefly Fuzz [MKIII] (Socketed 3 x AC128) - discontinued - c£160 on Reverb. Maybe that buffer from the preamp helps? BC107/BC108 Series Low Power Bipolar Transistors Page 3 20/04/06 V1. BC109 . 55 + shipping. Unlike most other transistor-based pedals, in this case some leakage is required for it to function properly. With Vce at 5 V, and Ic at 100 mA, the current gain (hFE) for B is typically 200, whilst for C is 400. YOU WILL RECEIVE( 20) HFE MATCHED NPN OUTPUT TRANSISTORS AND( 4) HFE MATCHED NPN OUTPUT DRIVER エフェクター,E Atai Houfu na MI AUDIO neo Fuzz V. 2SB274 Ge pnp 12W 80V - 1V 6A 75>C 400KHz - 50T FUJ These have integral heat sinks and are similar to the AC128 but have higher gains and higher power. He obtained his B. En una configuración típica, una señal de corriente muy débil circula a través de la juntura base-emisor para controlar la corriente entre emisor-colector. Depending on the type of transistor, the amount of gain available can vary substantially. 40. E. S. This explains why it is still possible to find nice new-old-stock of these jewels. 2uf that remove some bass excess. Russian GT308V (ГТ308В) : germanium PNP, don’t confuse cyrillic В with latin B because it’s actually equal to latin V. oc44 transistor the OC44 is a PNP germanium transistor preferred for AM (MW,LW) mixer and oscillator stages OC44 transistors. HTH Feb 17, 2008 #3. You can use 2n3906 as a substitute for the Ac128, they are silicon pnp, with a hfe 140+. 내어 주네요 불량도 별로 없었고 제품 품질은 꽤 좋았습니다. 00. Two Germanium transistors (type AC128) are selected by us for the best Fuzz Face sound. hFE: ca 100 ICmax: Max effect: Housing type: TO1. 90 . Not too bad considering they're over 60 years old! oc44 transistor the OC44 is a PNP germanium transistor preferred for AM (MW,LW) mixer and oscillator stages OC44 transistors. Resistors do not have polarity, you can place them in any direction. For example, the BC108 transistor which is commonly found silicon fuzz face pedals has a gain range from 110 to 800. ) Man they were useless. We should start a FAQ to collect all this info in one place. 0 out of 5 stars 11. BC109C HFE=90 . $5. Google fuzz face transistors. Example of Q3 hfe 4:02 4. 0 Absolute Maximum Ratings Description Symbol BC109 Unit Collector-Emitter Voltage VCEO 25 Collector-Base Voltage CBO 30V HFE:40/70 Pc:150mW I c:300mA F t:500KHz CC:50 TJ:85>C ASY12 PNP Germânio Audio / chaveamento AC128, AC153, ASY 48, ASY 76 Eur: AC128 Jap: Usa: 2N2706 Rus: GT403B drsoda: elebcz on eBay sells matched pairs of (modern) AC128s for Fuzz Face and Fuzz Factory – US$4. Each time that happens it lowers the transistors hfe, Motorola wrote an interesting paper on this effect, the mechanism was speculative. Title: ë Å ëç®%¼¾ ß»:&. Same catergory: 2N3963: Screening Options Available = ;; Polarity = PNP ;; Package = TO18 (TO206AA) ;; Vceo = 80V ;; IC(cont Abstract: transistor AC128 AC128 ac128 datasheet AC128 transistor datasheet mma7260 application note 9S08 MMA7260 MC9S08AC128 DEMO9S08AC128 Text: -bit AC128 microcontroller with Accelerometer Application by clicking on "Debug" button, launching , . The AC128 WAS found in the grey reissues made in the 90s. The transistors read: 1: hfe 400, leak 0,4mA 2: hfe 230, leak 0,2mA 3: hfe 200, leak 0,22mA 4: hfe 106, leak 0,066mA 5: hfe 75, leak 0,07mA 6; hfe 158, leak 0,1mA 7: hfe 200, leak 0,26mA 8: hfe 129, leak 0,1mA 9: hfe 152, leak 0,1mA I am making a Fuzz guitar effects pedal and the schematic requires an AC128 germanium transistor. Replaceable-slightly different: 2SB176, 2SB75, 3AX14, 3AX31, 3AX31A, 3AX31C, AC128, OC75 transistors which have a good range of Hfe from lower around 70 to higher When testing the same AC128 transistor, with the TC1 I get an Hfe of 95 and an Iceo of 0. (on this topic, this was a method how to tell the emitter from the collector terminal with a meter test on Rx10k range, due to the B-E junction often zenering and the B-C junction not, if you had an unknown THESE DIRECT REPLACEMENT ON SEMICONDUCTOR DEVICES ARE RATED AT 250 VOLTS 16AMPS 250WATTS. oc44 transistor the OC44 is a PNP germanium transistor preferred for AM (MW,LW) mixer and oscillator stages OC44 transistors. Use a multimeter or the color bands to obtain the resistance value. I watched a JHS video about stacking pedals and a That Pedal Show video about hitting a overdrive pedal with a rangemaster (to mimic a rangemaster going into a cranked amp) then put this together. In den Warenkorb; Germaniumtransistor PNP GT308 HFE 100-110 3,00 € inkl. AC Datasheet PDF – For a typical Ge transistor, the ON voltage ranges from 0. 2N5088 is a NPN transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at ground and will be closed (Forward biased) when a signal is provided to base pin. H. 程よいhfeのトランジスタ、それを正しく使うための定数。 ただそれだけ。 あとR1がaとbの二段構えになっているのは、トリマの抵抗を小さくしすぎても、トランジスタが焼けたりしないようにするための安全策だ。 hfe VCE=5. But i would sacrifice the slightly low hfe on q1 / q2 for the great sounding frequency response of these little puppies. Liven up your Fuzz Face, pimp your Fuzz Factory, wrangle your RangeMaster. The idea for this pedal was that I had some low gain AC128 transistors (~27 & 60 hfe) laying around, why not try and come up with a germanium overdrive. I have found that if the Model or Subcircuit is designed with close tolerance original values it will not function in simulation as desired in an actual preamp circuit. TO-39 CASE R2 (13-December 2013) www. synthrotek. Aven 17010 Adjustable Circuit Board Holder the AC128 transistor. In original case as in the image. 5 pF NF VCE=5. Anywhere near that IRL? This little bastard is still pretty popular (again) for guitar fuzzboxes; there actually is enough demand to support new production. They have the largest die of any TO-3 power transistor on the market which means they can dissipate more heat and operate more reliably. Another one that sounded very good is the mp21D which is super cheap . A2, August 2002 BC546/547/548/549/550 NPN Epitaxial Silicon Transistor Absolute Maximum Ratings Ta=25°C unless otherwise noted 2x SFT322 MATCHED Hfe=46 PAIR Germanium PNP Transistors ~ AC128 2N2706 GT1322 . Makes no difference to the sound but it sure looks cool Also, this thing is loud! Had to add a volume control. This pedal was designed to sound like a cranked Marshall amp and has a very dynamic amp-like response. With Silicon it becomes very difficult to stick with the Q1 hfe of 70 and Q2 hfe of 120, because most Silicon transistors are way over 120 to begin with. R e ctifiers section. Germanium Transistor Used Germanium Transistor, germanium transistor in the first stage, followed by se. Each time that happens it lowers the transistors hfe, Motorola wrote an interesting paper on this effect, the mechanism was speculative. The gain amplifier section (blue part of the circuit) is a simple common emitter layout to amplify the signal. It was HIGHLY variable in gain. Resistors. Note, not for a traditional fuzz face build. Seems to be quite a few people suggesting that Hfe and low leakage are all you really need to worry about. R1 = VR1/IR1 and R2 = VR2/IR1. 75 Out of stock Texas Instruments 2n338 Hfe Transistor Npn 65 2N338. Fully tested with a Peak Atlas DC55 and sorted for gain, compensating for leakage. Since VR1 ,VR2 and IR1 are found we can find R1 and R2 using the following equations. Many guitarists absolutely insist on genuine germanium transistors - and yes, they can tell the difference! The Fuzz Face is a distortion guitar pedal designed in London by Arbitrer Electronics Ltd in the autumn of 1966. It makes FUZZ sound which is extremely distorted sound. ZZZ = Voltage value where ICEO is specified. C $10. Hello, What is the hfe´s of the original fuzz face´s ac 128 transistors? or does it vary on each box? My fuzz face clone has 92 and 110 on ac 128 and it doesn´t sound as amazing as I expected. AC128s, Q1 has hfe = 65 - 85 and Q2 has hfe = 120 - 140. The value of beta can be large up to 200 for standard transistors, and it is this ratio between Ic and Ib, which makes the transistor a useful amplifier. osäuren zusammen ; es which hFE gain it will have, as concluded from the datasheet. The orange bar graph PNP Germaniumtransistor AC128 Handselektiert bei 20°C mit einem Leckstrom < 300µA Technische Daten: Gehäuse: TO1 Ucb= -32V Uce= -16V Ueb= -10V Icmax = -1A Ptot = 700mW Hfe = 70-80 Genaue Daten und Kennlinien finden sie im Datenblatt. com when available close This is one of Josh Scott's fallen hero fuzzes - as a great many fantastic JHS pedals have fallen between the cracks sort of over the years - with the fuzz category in particular having a significant numbers of casualties. AC128-01 Datasheet, Equivalent, Cross Reference Search Another look at the leaky transistor buffer! I was looking back at some of the recent articles and it suddenly occurred to me that the AC128 buffer using the leaky transistors that I posted a week ago could easily be adapted to work on a negative ground system. To choosing an specific hFE transistor, please enter here (PDF) AC128 Datasheet download. 50 Out of stock In the Fuzz Face’s case, it was usually NKT275s or AC128s. This is obviously subjective, but with either transistor, the Duocast PCB forms the foundation of probably the best pedal I’ve ever played through, certainly the best I’ve ever built. Type AC127 is the npn complementary to the AC128. 0MHz - 80 - 80 pF Notes: (1) Pulse width < 300s, duty cycle < 2%. All would be dine, but only the 308 for my little project. AC126 Datasheet, AC126 PDF, AC126 Data sheet, AC126 manual, AC126 pdf, AC126, datenblatt, Electronics AC126, alldatasheet, free, datasheet, Datasheets, data sheet For example, an AC128 has a maximum Collector capacitance of 200pf and a bandwidth of 1Mhz. centralsemi. YOU WILL RECEIVE( 20) HFE MATCHED NPN OUTPUT TRANSISTORS AND( 4) HFE MATCHED NPN OUTPUT DRIVER エフェクター,E Atai Houfu na MI AUDIO neo Fuzz V. Product Attributes: brand=texas instruments, mpn=2n338, to fit guitar=2n338, country/region of Germanium vs. J. FX Kits. Previous 1 2 Looking for troubleshooting help? Now that we’ve heard from the man who has never worked with a distortion circuit, we can proceede. Q in 2SC828AQ has a hFE of 130-260. The AC128 transistor has become virtually obsolete, as have most other germanium transistors. See here ; Function. These suffix letters are also Hfe ranks. PNP transistors will be "red ink, NPN transistors will be "black" ink. Base current Ib = Ic/hfe. mnem Matched pair NOS AC127 and AC128 NPN/PNP germanium transistors. AO40K48: 120watts Dc-dc Converter. Tested at HFE:71 LEAKAGE 0. Message 5 of I am using Multisim Aug 9, 9. . Nasa Fuzz Face Finally created the courage to put together a Fuzz Face and this little monster came out here! It was all vintage-style, with handmade trails on the island plaque, with a pair of AC12 8 germanium transistors of Hfe's properly measured and Russian capacitors! AC128 . I have Russian cheap mp21ds as a preference. Terrell item 1 SFT306 MATCHED PAIR/QUAD Germanium Transistors PNP 18V OC44 2N2614, HFE=45/60/70 - SFT306 MATCHED PAIR/QUAD Germanium Transistors PNP 18V OC44 2N2614, HFE=45/60/70 The NPN transistor is commonly used because it is so easy to produce. 02mA leakage. By Screamin' Seth W, Ph. 21mA £4. Symbol VCBO VCEO VEBO IC ICP PT Tj Tstg Ratings to +150 Symbol ICBO IEBO VCEO hFE VCE(sat) ton tstg tf V min typ max 100 Unit With Silicone Grease Natural Cooling Heatsink: Aluminum in mm . San Marcos, CA 92078 650-269-2420 Find simple and fast eBay-Products in Category Electrical & Test Equipment, Seller: sp9tnm. 19mA, with the Peak I get an Hfe of 102 and a Leakage Current of 0. Because of the late standardization of the European semiconductor devices many different codes were used by a several manufactures, the code their used was most of the time Brand specified. Ac128 hfe at 95 and 120 in the Ge. CARACTERSTICAS BSICAS. DC Current Gain 350 300 250 200 150 100 50 0 150°C −55°C With Vce at 5 V, and Ic at 10 µA, the current gain (hFE) for B is typically 150, whilst for C is 270. Many people think that original carbon resistors carry part of the organic fuzz distortion sound. Some transistors have huge tolerances where others are much tighter. Newsletter Subcribe to get information about products and coupons. I bought three and have so far built two using different Ge transistors; the first with an OC71, the second with an AC128. These components have a hfe of 111-120. New (Other) C $7. com A wide variety of oc44 options are available to you, There are 13 suppliers who sells oc44 on Alibaba. A site for the novice or established collector/restorer of Vintage Radio sets and Electronics. be fine if yours are a few HFe outside the range. Valve (tube) and Transistor with information/projects and technical help . These transistors were made in Bulgaria (ZPP - Botevgrad) in 1970s and 1980s under French license (licensed copy of the SFT322 transistor). They usually come in 3 different types : Tungsram germanium Transistor AC128, NOS condition. Versandkosten. 21ma. Submit a new link. On the board I used there’s one trimmer for Q1 but none for Q2, so if I want to play with the bias I have to change a resistor, so I socketed that one. Values available are 70 - 110. $0. Order Now! Discrete Semiconductor Products ship same day First roosters where made with excellent NPN germanium transistor CV7112 (military specs OC140). 25A, 1. 1 1 10 100 Figure 1. TEMA: EL TRANSISTOR BIPOLAR PNP. There fore VR1 = Vcc-VR2. I have measured several hundred AC128's for gain, and they vary from a gain of 16 to probably 180. That’s what the bias trimmers are for. ) I haven’t tried mine yet, but the quoted hfe values look good (77/102 and 78/100 respectively. HFE were 80 and 117, respectively. I just noticed that I do get a bit better sustain playing on my other strat with emg sa pickups. This is a filter specially designed for clock signals. Equiv. The fast type of eBay search. 3AC31C is similar to AC128 - a legendary t. Does anyone know the likelihood of getting a bad one if it’s untested or what value is sensible for the hfe, or the effect of different hfe values with regard to a Fuzz effect pedal? I don’t suppose you knew or remember the hfe value of the ac that you used? Hey there folks, Just wondering how you all go about buying germanium transistors in bulk. Low power AF amplifier transistors like the OC71 can be replaced with the economically priced AC125. OBJETIVOS: 1. 90 AC176 Ge-Transistor NPN (Low hFE 30-40) AC176 can be used in Fuzz Face ゲルマニウム版(AC128) 2015/5/1 2017/1/16 エフェクター webをざっと見回しても、ファズフェイスについてはたくさんの考え方があるようで、実に様々なバリエーションの制作記事がある。 程よいhfeのトランジスタ、それを正しく使うための定数。 ただそれだけ。 あとR1がaとbの二段構えになっているのは、トリマの抵抗を小さくしすぎても、トランジスタが焼けたりしないようにするための安全策だ。 Sink Driver General Purpose. Graham W said: Hfe 60MN Equiv: AC126 2N2431 Feb 25, 2008 #5. com A wide variety of oc44 options are available to you, There are 13 suppliers who sells oc44 on Alibaba. 8A hfe: 100-300 @ 150mA Power Dissipation (Ptot): 350mW Type: PNP * Image shown is a representation only hfe invólucro ac127 genpn 32 500 340 1,5 100 to-1 ac128 gepnp 32 1a 1w 1 55-175 to-1 ac187 genpn 25 2a 1w 5 100-500 to-1 ac188 gepnp 25 2a 1w 1,5 100-500 to-1 ad161/2 gepnp 32 3a 6w 0,5 50-250 to-66 bc107 si-npn 45 200 300 300 125-500 to-18 bc108 si-npn 20 200 300 300 125-900 to-18 diyguitarpedals. The first FF's manufactured in the UK used the AC128, a 45-165 Hfe European germanium PNP transistor, cheap/common at that time (later on replaced by the Newmarket NKT275). Therefore quite apart from the usual NKT275, AC128 and CV7005 Transistors you tend to find in your typical Germanium Fuzz Face pedals. Comprobar las caractersticas de funcionamiento de un transistor bipolar PNP. For a transistor to work properly, it needs to be formed from a semiconductor material. 31 January 2019 by Jacques Charbit. or Best Offer. Notes on Transistor Substitution . Add to Wish Vintage Germanium New Old Stock PNP NKT-275 Transistors . (on this topic, this was a method how to tell the emitter from the collector terminal with a meter test on Rx10k range, due to the B-E junction often zenering and the B-C junction not, if you had an unknown THESE DIRECT REPLACEMENT ON SEMICONDUCTOR DEVICES ARE RATED AT 250 VOLTS 16AMPS 250WATTS. Package: TO-1 can Status: NOS (New Old Stock) Tested Components: YES all Hfe over the minimum 45RoHS compliant: no AC128 Germanium Transistor, Various Used and Tested Items This is one item of used AC128 transistor which has been recovered from a radio and tested with an Alas DCA55 semiconductor analyser. The PCB is set up to add a stomp box switch with ease and true bypass. Multi-Fuzz PCB The AMZ Multi-Fuzz pc board is a versatile fuzz design that offers many options for customizing the circuit to better suit your rig and playing style. . Let Ic ≈ Ie . R in 2SC828AR has a hFE of 180-360. Why are NPN types usually scarcer and more expensive? According to R. Seller 100% positive. 0V, IC=10mA, f=100MHz 150 MHz Cob VCB=10V, IE=0, f=1. uÀ¥ B 9 ÇvÐÂs¥ ¨ {k õýËO _ ~ùò B - 3%Í ì Â|þ¥ùôÌ 8ñ : º Author: ë Å ëç®%¼¾ ß»:&. I've had great success with the AC128 as well. 0 Electrical Characteristics (Ta = 25°C unless otherwise specified) Description Symbol Test Condition Minimum Maximum Unit Info about building and modding: All i know is the lots i datasheett didn’t specify the Hfe like the one you linked to. MW F h21b. They have the largest die of any TO-3 power transistor on the market which means they can dissipate more heat and operate more reliably. The Fuzz Box design I have with SPICE has high gain transistors and I replaced the Feedback Loop Resistor with a Potentiometer to get much higher gain so I could use low hfe xistors. According to ON. NPN: AC127, OC140. September 11, 2013; Overdrive/Distortion, Technical; One facet of the design process here at Keeley Electronics comes down to selecting not just the highest quality components for use in our pedals, but the right component for the sounds we’re trying to achieve. Fuzz Box and all I wanted was something with a workable BF. AC151r AC128 AC187K AC188K BC107 BC177 BC546B x521_d_2D-2Led-11T-2IC-1U-10V_900078-11 Hochstrom hFE-Tester(Transistor-Verstärkungstester)_1a. According to ON. They usually come in 3 different types : AC128 Germanium Transistor (PNP hfe 100-130) New production U. SKU: SKU 24445: Weight: 0,77 g Selected Tungsram AC128 pnp germanium transistor, hFE=80-90 Leakage smaller than 300uA AC128 - hFE=80-90, 5,90 € Due to the currently increased order volume, delivery times unfortunately are longer than usual. AC128 seems to match the main parameters. 그리고 2000년 중반부터 빈티지 음향기기와 기타 와 베이스 기타 에 쓰는 빈티지 기타 이펙터 가 주목을 받아서. D. The original Arbiter Fuzz Face pedals were equipped with NKT275, AC128, or SFT363E transistors, depending on what date the unit was manufactured. Introduction 0:12 2. The Si5317 is fully configurable, allowing both the work frequency and loop bandwidth to be set. AC128 hfe 111-120 We hand select AC 128 transistors to a specific gain range. AC128 Transistor Germanium - CASE: TO1 MAKE: Motorola Semiconductor Products AC128 Germanium PNP Transistor. AC128 FUZZ FACE: New old stock AC128 Fuzz face pedal transistors sorted out for HFE 80 to 120 £2. Google hfe ranges for fuzz factory. Each time that happens it lowers the transistors hfe, Motorola wrote an interesting paper on this effect, the mechanism was speculative. Effects of Frequency f, FREQUENCY (Hz) 7. According to ON. I bought some cheap asy37s from Poland to get started measuring and they’ve said to be good replacements for ac128. 다만 원하는 HFE의 물건을 구하려면 상당히 고생할 것이다. oc44 transistor the OC44 is a PNP germanium transistor preferred for AM (MW,LW) mixer and oscillator stages OC44 transistors. Aplic. I built mine with the following values: Q1 EFT83 Hfe=74, Q2 GT308 Hfe=75 and Q3 AC128 Hfe=114. Tube AC 152 or Röhre AC152 ID33916, Transistor, Wires and Power/Output shown. ac128 hfe