I'm not concerned with the transistors being an exact replacement but need something that will work in the same circuit. Thanks in advance for your help! N. nashvillebill Super Member. Jun 1, 2008 ... germanium transistor (Ge) might be pretty tough to find.I don't believe they use germanium any more, probably alot cheaper to use silicon. ke4jhj

R2 = kOhm. R1/R2 =. Empty or zero fields are ignored during the search! How to choose a replacement for a bipolar transistor 🔗. TOTAL: 143978 transistors.

These transistors were meant to replace the vaccum tubes found in World War Two era Radar. The military wanted smaller, lighter and more powerful radar to bomb Germany. ... We demonstrated the first silicon germanium transistor, which operates at frequencies up to 500 GHz. Our invention refers to so-called band transistors and includes a ...

Motorola Gold-Lead TO-92 NPN transistor, 20V, 200mA. $1.09. Sold Out. HEP-231 HEP231 PNP Germanium TO-36 Power Transistor. Motorola HEP Replacement Transistor, replaces 2N277, 2N278, 2N441, 2N441BLU, 2N442, DS501, DS502, GE-4. $14.40. 6 IN STOCK. HEP-236 Germanium PNP Transistor 80V 25A 106W.

However, before such gate stacks on germanium can be put to practical use in a manufacturable silicon-replacement technology, the thickness of the dielectric, which strongly affects transistor ...

Start at the input's and check both sides of each component. Where the problem rears it's Ugly head should be the output side of your culprit. 2n251 or dtg110b should be close enough for Gov't work. I ran the 43046 # thru NTE, and it came back NTE121. Also the 2n251 AND the DTG110B came back same nte#.

I'd like to find a modern silicon PNP transistor replacement for an AC125 (those germanium transistors are sometimes noisy... and are rather pricey too). It's a …

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. I got a Siemens Club RK 231 vintage radio which had …

HP6823A "audio" amplifier *fixed, trace. The transistor is B1654 in the manual and I found "Bendix 0 - 407" in the sister unit. Its from a HP6823A. I have a feeling I am fucked but I thought I would try the forum. I have a working sister unit so I found that its open on the diode test and the manual seems to point me to the same place.

2N1304 is an NPN transistor available in TO-39 transistor package. 2N1304 is a transistor of 2N130x series which also contains other transistors such as 2N1302, 2N1306 and 2N1308. All of the transistors in the series are almost similar and can be used as equivalents. The transistor is made with germanium alloy which is a …

Distributor Cross Reference Search From this one search tool you can now find replacements for over 470,000 industry devices. Enter the part number you wish to replace and click the search button or press the ENTER key on your keyboard. You may use the * character as a wildcard, but you must supply at least two other characters.

Pio1980 said: I've had problems with the RCA sourced OEM germanium transistors spontaneously expiring in the older TransOceanic sets, usually the shielded RF types. No the transistors are not blown. The right channel became a bit "garbled" when I powered it on last week. I benched the preamp/receiver and the amp with a set of bench …

Average characteristics of the AC128 family. Maximum collector-emitter voltage: 12 to 20 V. Power dissipation : 0.5 to 1.2 W (more than most of other small case transistors). Maximum collector current : 0.5 to 1.5A (more than other small case transistors). Gain : 80 to 250 (rarely more than 150). Maximum frequency : 0.5 to 1.5 …

Germanium transistors. The earliest practical transistors were made from germanium, and devices using this material were commonly used well into the 1970s. ... But, should you ever encounter a faulty one, just about any PNP germanium transistor should be a suitable replacement. Obviously, if it is attached to a heat sink with a spring clip ...

1. Go look up a data sheet for the 2N3904. Notice that most values (leakage, hfe, etc) have a range of possible values. So there is no such thing as a "perfect" replacement - only one which is generally the same. Now look at the data sheets of the potential replacements, and pick one with a good match. – WhatRoughBeast. Oct 13, …

The idea is to replace the silicon there with a material that can move current at greater rates. Building transistors with such channels could help engineers continue …

Jan 10, 2024. #9. It only just dawned on me that the Crown's output transistors are NPNs. So even if the base biasing problem was solved, you'd need to find Germanium NPN parts, in a TO-3 case, good for an absolute-desperation-minimum of 60V Vcb and Vce. I'm thinking counterfeits won't be a problem, as such, because you can't counterfeit what ...

New Germanium-Based Material Could Replace Silicon for Electronics - IEEE Spectrum. Semiconductors News. New Germanium-Based Material Could …

ALSO BY THE SAME AUTHOR BP108 International Diode Equivalents Guide BP140 Digital IC Equivalents and Pin Connections BP141 Linear IC Equivalents and Pin Connections. INTERNATIONAL TRANSISTOR EQUIVALENTS GUIDE. by. ADRIAN MICHAELS BERNARD BABANI (publishing) LTD THE GRAMPIANS. SHEPHERDS BUSH ROAD.

Talon Electronics stocks transistors, diodes, TV parts, ICs, capacitors, replacement parts, hardware, connectors, test equipment parts, resistors, inductors, switches ...

but I must say that $ 6.00 is not cheap. An American replacement for the (European) AC125 could be 2N1176 or 2N406 (even same pin-outs), but I think, for the simple purpose it is used, any transistor that is a low power germanium PNP will do.

You cannot replace a Germanium transistor with a silicon transistor… without significantly redesigning the circuit. Germanium transistors come in PNP and …

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 …

If a germanium transistor is generating noise, sometimes holding a hot tip soldering iron very close to the body of the transistor, will cause the noise to vary within the transistor. Crude test, doesn't always work, but sometimes it does. ... I meant replace all of the germaniums as I suspect more will likely get noisy if they aren't already ...

Germanium transistors. The earliest practical transistors were made from germanium, and devices using this material were commonly used well into the 1970s. ... But, should you ever encounter a faulty one, just about …

Why? The CK722 has a gain of about 10 to 30. has a gain of about 20 to 30. Today's "universal replacement" transistors such as the 2N2222A and 2N3906 offer a gain of . The modern devices also have lower leakage. …

The transistor got its start in the 1940s when engineers began looking for a replacement for the electron tube, an earlier device for amplification and switching. The electron tube was based on the light bulb, so it was big, fragile, and created a lot of excess heat. The inventors of the point-contact germanium transistor were John Bardeen, and ...

1) replace the germanium with a silicon. 2) change component values. You make it sound like the old transistors are a weak point. If I go with 3055's and some kind of PNP (replace the 4 power …

Germanium Transistors There is an audible sound difference between germanium and silicone transistors (it appears that all together germanium devices have lower intermodulation distortion and this is giving "clean" sound similar to tube pre-amps). The best possible transistors for that purpose were AC151r and they were used in …

by James T. Hawes, AA9DT. Redesign Germanium Transistor Circuits, Part 7. Replacement Transistors, Capacitors, & Diodes. Universal Replacement Parts. Fortunately, replacing germanium deviceswith …