hp13a transistors

[Ed Kotkiewicz]

Dave Larson wrote:

> Hello Heathkit folks.  I have a hp13a with shorted transistors. Looks like
> they have been replaced before with RCA SK3009 transistors.
> Does anyone know what types should be used as replacements?

EK> Dave, they used 417-120's.  I suspect Heath sold them as a matched set.
That crosses over to an ECG-179.  They are PNP-ge AF Pwr. Amp

> I believe the original parts where germanium transistors.

EK> Correct

> Has anyone
> tried converting this power supply to use silicon transistors?

EK> Can't help out there.  I'd look for the 179 if possible.

Ed

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