Germanium Pnp Replacement

المنتجات الساخنة

Does it matter if I replace germanium transistors with

网页2017年8月11日The main difference between germanium and silicon transistors in switching circuits, be they either PNP or NPN transistors is that VBE for small germanium is about 0.3 volts whilst those of silicon are about 0.7 volts. Also germanium are more

Contact

replacement Looking for a suitable transistor

网页2017年5月9日An American replacement for the (European) AC125 could be 2N1176 or 2N406 (even same pin-outs), but I think, for the simple

Contact

AC128 Transistor Pinout, Equivalent, Features, Uses and

网页2021年10月8日NPN Complementary of AC128 is AC127 Replacement and Equivalent Silicon material alternative for AC128 are 2N2905,2N4032, 2N3109, 2N3107, BC337.

Contact

Antique Radio Forums • View topic Replacing

网页2018年4月3日Location: Smithfield, Pa. 15478. While the part number may not be a major factor, in this application hiss and noise is. Many germanium transistors get more noisy

Contact

Replacement for AC125 Germanium transistor

网页2009年9月8日Since the emitter to base voltage in a Si PNP transistor is ~0.6V, and only ~0.25V for a Ge transistor, the base voltage will need to be more positive (by ~0.35V) for

Contact

NKT275 Transistor Pinout, Equivalent, Features, Uses and

网页2022年1月9日The procedure of using these transistors is same as we use any other PNP transistor. Replacement and Equivalent Silicon material alternative for NKT275 are

Contact

Replace Germanium Transistors with Silicon PNP ones!

网页2021年3月31日If you ever had a vintage gear where you needed to get it to work but needed a replacement for Germanium transistors especially in audio circuits and you

Contact

Redesign Germanium Transistor Circuits, Part

网页Your radio might also use germanium diodes to bias its complementary output stage. replacing the output devices, you'll have to replace the germanium bias diodes with silicon Use standard, PN diodes,

Contact

Redesign Germanium Transistor Circuits, Part 1

网页PNP:Silicon replacement is 2N2907 or 2N3906. (Or: device with beta= 200). NPN:Silicon replacement is 2N2222 or 2N3904. (Or: device with beta= 200). You may use other devices. Device beta affects the value of

Contact

worldradio: Substitutes for AF117 Germanium Transistors

网页2020年1月8日But often the RFIF can be replaced with PNP Silicon if there is an emitter resistor. Yes, the collector current may be lower, but with suitable gain RF types, it's not

Contact

AC128 Transistor Pinout, Equivalent, Features, Uses

网页2021年10月8日NPN Complementary of AC128 is AC127 Replacement and Equivalent Silicon material alternative for AC128 are 2N2905,2N4032, 2N3109, 2N3107, BC337. Alternative for using in Fuzz Face are BC109, BC183, BC108, BC108C, CV7005, NKT275 AC128 Transistor Explained / Description AC128 is a TO-1 package transistor.

Contact

Germanium PNP transistor based amplifier (OC36)

网页2014年12月14日It used Philips Germanium PNP transistors, 10 Watts per channel. Thru external Rola 8 inch C8MX Speakers, it was quality sound, impressed quite a few listeners. There were also hybrid car radios, using a single 2N301 or equivalent Germanium PNP output transistor, which ran a little warm. The rest of the radio had valves (tubes). The

Contact

Redesign Germanium Transistor Circuits, Part

网页Your radio might also use germanium diodes to bias its complementary output stage. replacing the output devices, you'll have to replace the germanium bias diodes with silicon Use standard, PN diodes,

Contact

Replacement for AC125 Germanium transistor

网页2009年9月8日Since the emitter to base voltage in a Si PNP transistor is ~0.6V, and only ~0.25V for a Ge transistor, the base voltage will need to be more positive (by ~0.35V) for a Si transistor, than it is for the Ge transistor. The best approach is to replace the actual R12 by a larger resistor. The new value for R12 is best determined by trial and error.

Contact

Replace Germanium Transistors with Silicon PNP ones!

网页2021年3月31日If you ever had a vintage gear where you needed to get it to work but needed a replacement for Germanium transistors especially in audio circuits and you wondered if simply replacing with Silicon PNP transistors would work (with some tweaking and minor adjustments), the answer is yes.

Contact

Germanium Transistors! Help! diyAudio

网页2021年11月22日I am extremely interested in Germanium transistors. I have found AD161 and AD162 at AliExpress, but, these are 20V. 1. I would take any NPN and PNP, even, when they are not complementary ( yet, kind of, similar, to some extent ). 2. Ideally, all voltages best be >= 40V. In case this is not possible, they must be >= 30V.

Contact

Raytheon Germanium PNP Transistors Antique Radio

网页Raytheon Germanium PNP Transistors. These show up in some equipment I have from the 1962-1966 time period. The supply voltage going to the circuitry is -14.4VDC and there is a mix of some RC coupled amplifier circuits and some transformer coupled to base circuits with relays as the collector loads. The 57D1-70 transistors are the ones connected

Contact

Redesign Germanium Transistor Circuits,

网页PNP:Silicon replacement is 2N2907 or 2N3906. (Or: device with beta= 200). NPN:Silicon replacement is 2N2222 or 2N3904. (Or: device with beta= 200). You may use other devices. Device beta affects the value of

Contact

ac128 germanium pnp transistor All About Circuits

网页2015年3月21日Joined Dec 20, 2007. 11,248. Aug 9, 2011. #10. 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.

Contact

OC44 modern germanium (or non-germanium)

网页2010年6月28日I am not sure about modern devices; I believe there are no similar transistors in current production; but myriads of Russian military surplus transistors are available: P416A Russian Germanium PNP Transistors NOS Lot of 100 eBay (item 250626882817 end time Jul-03-10 01:22:12 PDT) To test "sound" of silicone transistors

Contact

New Page 1 [diy.smallbearelec]

网页According to R. G. Keen, the physical characteristics of germanium made it much easier at the time to manufacture PNP devices rather than NPN. The demand for non-leaky, temperature-stable NPN devices of consistent

Contact

UK Vintage Radio Repair and Restoration Transistor

网页At the time of writing a limited range of germanium audio transistors are still available, but it is probably only a matter of time before they are discontinued. The AC128 is a good general-purpose replacement for OC71, OC78 and OC81. Note that AC127, AC176 and AC187 are NPN and the others are PNP.

Contact

bendix germanium transistor replacement? HP6823A

网页2021年7月10日The schematic says: CR18 Rect. Si 150mA 100PIV 1N91 G.E. but this is really germanium. CR19 Rect. Si 500mA 200PRV 1N3253 RCA They're both oddball diodes to give some bias current to Q1 and Q2, by CR18 and CR19 Vf adding up should be a bit less, and at most add up- to the VBE of Q1 and Q2. If Q2 gets a Si replacement,

Contact

PNP Transistor Tutorial The Bipolar PNP Transistor

网页To cause the Base current to flow in a PNP transistor the Base needs to be more negative than the Emitter (current must leave the base) by approx 0.7 volts for a silicon device or 0.3 volts for a germanium device with the formulas used to calculate the Base resistor, Base current or Collector current are the same as those used for an equivalent

Contact

Germanium PNP transistor based amplifier (OC36)

网页2014年12月14日This will let you use your PNP Germanium there. Also invert any electrolytics. b) invert power supply polarity. given the headphone use, I would build the nominally "3 ohm" version suggested above, simply because it uses the lowest supply voltage: 17V DC which is well within ratings.

Contact

UK Vintage Radio Repair and Restoration

网页At the time of writing a limited range of germanium audio transistors are still available, but it is probably only a matter of time before they are discontinued. The AC128 is a good general-purpose replacement for

Contact

Germanium Transistors! Help! diyAudio

网页2021年11月22日I am extremely interested in Germanium transistors. I have found AD161 and AD162 at AliExpress, but, these are 20V. 1. I would take any NPN and PNP, even, when they are not complementary ( yet, kind of, similar, to some extent ). 2. Ideally, all voltages best be >= 40V. In case this is not possible, they must be >= 30V.

Contact

Replace Germanium Transistors with Silicon PNP ones!

网页2021年3月31日If you ever had a vintage gear where you needed to get it to work but needed a replacement for Germanium transistors especially in audio circuits and you wondered if simply replacing with Silicon PNP transistors would work (with some tweaking and minor adjustments), the answer is yes.

Contact

Antique Radio Forums • View topic A replacement for a

网页Post subject: Re: A replacement for a 2SA70 germanium transistor..PNP. Posted: Sep Fri 14, 2018 10:55 am. Member. Joined: Jan Thu 14, 2016 8:29 pm. Posts: 165. Another good replacement is the OC170. It's easy to obtain, and has the same pin-out and case style to maintain appearance (if that's important to you). Top.

Contact

ac128 germanium pnp transistor All About Circuits

网页2015年3月21日Joined Dec 20, 2007. 11,248. Aug 9, 2011. #10. 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.

Contact

2G374 PNP transistor replacement.

网页2021年4月10日2G374 PNP transistor replacement. ? on: July 20, 2009, 03:32:25 pm ?. Hello!! I'm building a jtm45 2x12 combo (1962 bluesbreaker) from scratch using 1960's components like the original. (mustard, hunts and radiospares caps, bulgin hardware, radiospares transformers...). After some time, and having most of the components and

Contact

New Page 1 [diy.smallbearelec]

网页According to R. G. Keen, the physical characteristics of germanium made it much easier at the time to manufacture PNP devices rather than NPN. The demand for non-leaky, temperature-stable NPN devices of consistent

Contact

OC44 modern germanium (or non-germanium)

网页2010年6月28日I am not sure about modern devices; I believe there are no similar transistors in current production; but myriads of Russian military surplus transistors are available: P416A Russian Germanium PNP Transistors NOS Lot of 100 eBay (item 250626882817 end time Jul-03-10 01:22:12 PDT) To test "sound" of silicone transistors

Contact

bendix germanium transistor replacement? HP6823A

网页2021年7月10日The schematic says: CR18 Rect. Si 150mA 100PIV 1N91 G.E. but this is really germanium. CR19 Rect. Si 500mA 200PRV 1N3253 RCA They're both oddball diodes to give some bias current to Q1 and Q2, by CR18 and CR19 Vf adding up should be a bit less, and at most add up- to the VBE of Q1 and Q2. If Q2 gets a Si replacement,

Contact

PNP Transistor Tutorial The Bipolar PNP

网页Generally, the PNP transistor can replace NPN transistors in most electronic circuits, the only difference is the polarities of the voltages, and the directions of the current flow. PNP transistors can also be used as

Contact

NTE Electronics NTE104 PNP Germanium

网页2015年7月15日This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. Read full return policy .

Contact

germaniumbjts GitHub Pages

网页SPICE Models. These germanium BJT SPICE models are based on the Gummel-Poon parameters from Table 1 in "Comparison of Germanium Bipolar Junction Transistor Models for Real-Time Circuit Simulation”, Proceedings of the 20th International Conference on Digital Audio Effects, Edinburgh, Scotland, Sept. 2017.The parameters were extracted

Contact

2N965 Germanium PNP Transistor eBay

网页2023年5月8日Find many great newused options and get the best deals for 2N965 Germanium PNP Transistor at the best online prices at eBay! Free shipping for many products! Money Back, Replacement: Buyer pays for return shipping: Refer to eBay Return policy opens in a new tab or window for more details.

Contact