SB-303 Audio Amp board

[Michael Tallent]

Al:

I think that is a MJE-521 that goes with the MJE-371.  If anybody needs
a few of these, I have some left over from my SSTV kit building days.

Mike Tallent W6MXV

al winfrey wrote:
>
> Tim,
>
> My SB-303 manual and schematic clearly shows a matched pair of transistors in the final
> audio amp.  Q511 and Q512 are Motorola MJE-371 and MJE-512 respectively.  You should also
> check the 100 uf electrolytic for possible failure as well. The driver transistor Q509 is
> an RCA 2N3053.
>
> 73's and good luck,
>
> al winfrey - wa9hsl
> ....
>
> Tim WB4BAH wrote:
>
> > Trying to get my old rigs up and running after several inactive years.
> >
> > Have a SB-303 in which the audio amplifier transistor fried.  The manual
> > gives no real information on the diode except the Heathkit part number
> > which means nothing in any substitution books I have found. I need
> > suggestions on an easy to find transistor to replace it with.  Anything
> > from "Ripoff Shack"?  A diode and some resistors also fried, but they
> > will be easy enough to figure out.
> > --
> >
> > Tim Kemp WB4BAH      | Homepage http://www.mindspring.com/~tkemp/
> > P.O. Box 775         | Genealogical info on these surnames:
> > Fuquay-Varina,NC     | KEMP, STROTHER, MURPHY, and allied families.
> > 27526                | Links to other Genealogy pages
> > tkemp at mindspring.com | Amateur Radio and Railroading links
> >
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