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Old 30th July 2007, 03:34 PM   #1
aldovan is offline aldovan  Brazil
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Default Germanium transistors work fine in output stages ?

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Anyone get good results using a Germanium transistor in a output stage ?

Aldovan

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Old 30th July 2007, 04:41 PM   #2
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Yep, not too shabby for a 60's design. It's about as useful as two tin cups with a piece of string between them.
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Old 30th July 2007, 05:10 PM   #3
ilimzn is offline ilimzn  Croatia
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Why not give us a few good reasons to try them, given all the silicon abundance available? It would be a nice way to start a constructive discussion...
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Old 30th July 2007, 05:11 PM   #4
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Its been discussed before:

http://groups.google.com/group/rec.a...028529742a99fc
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Old 30th July 2007, 05:31 PM   #5
aldovan is offline aldovan  Brazil
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Default And why not Germanium ?

Ok, have a lot of silicon transistors today and the sound quality remains very inferior to old tubes .
Germanium transistors do not can be a new option for superior quality ?
In my tests with Mosfets, this device have a superior THD when compared with bipolars...
The modern industry have others options? For me, NO !!!
The best option is the return to past !!!
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Old 30th July 2007, 05:54 PM   #6
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Default Putz!... essa foi profunda.... that one was great


Now we have a good reason to start a discussion.

Big field town was also great!

regards,

Carlos
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Old 30th July 2007, 06:00 PM   #7
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Germanium devices of old were leaky, highly temperature sensitive, and hard to stabilize. Reliability wasn't as good as today's devices either. IMHO, the perfect device for hi-end audio! Seriously, they do have one advantage. They turn on at or near zero volts. That's why germanium diodes are still used for some small signal RF applications- you can still buy a 1N270. If you could keep the thermal problems under control, there might be the possibility of lower inherent crossover distortion. I didn't read the old stuff, so sorry if this has already been mentioned.
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Old 30th July 2007, 06:01 PM   #8
aldovan is offline aldovan  Brazil
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Default Germanium is a good reason...

Obrigadooo,

Thanks, the Brazil is really beautifull...

Aldovan
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Old 30th July 2007, 06:10 PM   #9
aldovan is offline aldovan  Brazil
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Default Temperature do not is a problem

Temperature do not is a problem, I can use liquid oxygen or a refrigerator chip in the Germanium device...
Seriously, a good termal project help for avoid problems.
In others words, Mosfets have a higher distortion wheen compared to bipolar and is the most used output transistor today...

Aldovan
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Old 30th July 2007, 06:35 PM   #10
Eva is offline Eva  Spain
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After so many years trying to achieve better and better linearity and reliability in audio electronics, we have to face the sad truth about the human being:

1 - We love distortion and metaphysics
2 - Amplifier people doesn't want to learn about loudspeakers and acoustics
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