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Old 13th September 2010, 03:47 AM   #1
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Default Anyone want this?

Not sure of the age or if it works.

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Old 13th September 2010, 03:55 AM   #2
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What are the transistors called?
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Old 13th September 2010, 04:23 AM   #3
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Quote:
Originally Posted by lineup View Post
What are the transistors called?
TO-3 case 68P1B (crosses to NTE 121) Germanium PNP
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Old 13th September 2010, 10:39 AM   #4
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It is a 45V, 10A, 90W PNP Audio Output TO3 GERMANIUM transistor.
At least NTE121 and 68P1B is something like.
... See attached data ....
The hFE gain is good: 50-165, typ 90
VBE at 1A is only 0.38V ... which is a Germanium feature
fT, upper transistion frequency is low: 300 kHz
but this enough to make a good output follower stage

I am sure someone would like to try those.
Always nice to explore nice things. New challenges.
We have had several threads about old Germanium devices.
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Old 13th September 2010, 10:46 AM   #5
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Thanks for the info. This amp is free to anyone here who might like it. I don't have a use for it so it's better to go to someone here who might like it then find it's way into a landfill. Cover shipipng it's yours. Just thought I'd offer.
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Old 24th September 2010, 09:11 AM   #6
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I had a chance to test this amp. It does work. Doesn't sound half bad either. It originally powered 2 of the speakers in the picture. 12" woofer and a horn tweeter. I'd guess it's ~25w/ch or so.

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Old 24th September 2010, 09:39 AM   #7
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How much for shipping to sweden ?
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Old 24th September 2010, 09:41 AM   #8
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Originally Posted by Tekko View Post
How much for shipping to sweden ?
Probaby alot.
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Old 24th September 2010, 09:48 AM   #9
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25-30 USD ? Im willing to spend about that much for a free amp.
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Old 24th September 2010, 10:15 AM   #10
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Originally Posted by Tekko View Post
25-30 USD ? Im willing to spend about that much for a free amp.
I really don't have any idea. Last time I shipped something out of the states (dvd player) it was over $100 in shipping.
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