What are the transistors called?
TO-3 case 68P1B (crosses to NTE 121) Germanium PNP
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.
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.
Attachments
How much for shipping to sweden ?
Probaby alot.
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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