What Ger PNP transistors do I use for the following circuit in aradio: HF AMPLIFIER, MIXER; LF AMOPLIFIER, DRIVER and AUDIO OUTPUT?Does anyone know whether the numbers of the trasnsistors arestandardized? Or each manufacturer use its own? It seems that thereare tons of numbers out there such as 2N107, 2N239, 2S678, etc.......God Bless!Daniel

You don't.Germanium transistors were pretty much obsoleted forty years ago, bysilicon transistors. There is a far better range of silicon transistors,and generally they have far better specs than germanium transistors.The only reason you'd use a germanium transistor at this time is ifthere was a specific reason for using germanium. There are still somethings where germanium transistors can be useful, which is why someare still being manufactured, but the average hobbyist wouldn't haveneed for those uses. And there is no reason to use germanium transistorsin a radio.If you are looking for germanium tranistors because you have a schematicthat uses them, and then you can't find the devices specified, it's becausethe schematic is decades old and you need to drop that schematic andfind soemthing more modern, than try to find germanium transistorsto use in the schematic.The reason some of us have germanium transistors lying around is becausewe accumualted them decades ago, when they were...

What Germanium PNP transistor do I use?

Mar 16, 2007 45 Replies

Rate this thread:

Eeyore 19 years ago

Yes you would have to scan it or get someone to scan it for you.

You could post it on various sites that host image files for free. I recently used rapidshare to do just that for example.

Graham

Vote

Joerg 19 years ago

My father's 1960's Ford Taunus 12M was 6V. This series was somewhat comparable to the Ford Cortina and probably named after the German mountain range "Taunus" near Frankfurt. 12M meant 1200cc, 15M was 1500cc and so on. AFAIR they were built at Ford Motor Company in Cologne, Germany.

Regards, Joerg http://www.analogconsultants.com

Vote

Michael A. Terrell 19 years ago

I think that VW was the lone holdout in the switch from 6 to 12 volts. I used to sell and install a lot of 6 V to 12 V converters for '40s and '50s cars in the early '70s. I repaired a lot of them, when the moron hooked it up wrong and took out the pair of Germanium power transistors. There was also a 12 V positive ground to 12 V negative ground converter for a few oddball models.

Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

Vote

Joerg 19 years ago

No, those are fairly small:

formatting link

But in their days anything that carried the name Tektronix on the front panel was big bucks.

Regards, Joerg http://www.analogconsultants.com

Vote

Homer J Simpson 19 years ago

ISTR 12 volt tube sets with synchronous rectifiers.

Vote

ian field 19 years ago

formatting link

Mine was free - a company I used to repair monitors for decided to downsize and concentrate on their core business (keyboard refurb), they had a pile of scopes in the corner which they donated to me. The lowest was a Trio S/T

10Mhz and the best was the 465, all of them had some fault or other, the 465 sometimes "goes to sleep" - it wakes up with a gentle pat on the side so for the time being I'm content with that rather than mess with the insides if I can get away with it.

Vote

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required