IP-27 Transistors

[Mark Graalman WB8JKR]

 Hi Greg,

 Those are germainium but I see no reason why silicon
units wouldn't work. Any silicon with TO-3 case,
col E rating of about 70 v and 5 to 10 amps with a Hfe
of at least 80 should work fine. Actually, a 2N3055
would probably work.

BTW, the 2N301 crosses to a ECG 121

Mark  WB8JKR


On Tue, 1 Oct 2002 17:49:50 -0700 Greg WB8NGA <greg at BOWSER.COM> writes:
> Just wondering if someone knows of a good replacement
> for the two series pass transistors for the IP-27 power
> supply?  Mine are 2N301's but they aren't being made
> anymore.
>
> Thanks in advance,
> Greg
>
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