8640B variale AF oscillator

[J. Forster]

Try ArtekMedia.com. Dave H can likely tell you from looking at the manual
page.

Best,
-John

=============


> Hello,
>
> I am struggling with the variable AF oscillator (option 001) in my
> 8640B.  I suspect someone* has installed JFET A11Q11 incorrectly.  The
> information on page 8-4 of the manual shows two different connection
> schemes for black plastic FETs.  The one shown in the 2010 ARRL handbook
> for a MPF-102 JFET ( and it agrees with Motorolla's spec) is not like the
> two shown in the 8640 manual!
>
> Perhaps someone on this list has one of these oscillators that works and
> can check how Q11 is wired up.
>
> Thanks.
>
> *John,  W0GN
>
>
>
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