Re: Sad reality of stock vfo
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quote ====
I changed C91, C92 to 680pF polystyrene, C94, C95 to 47pF polypropylene,
C96 to 150pF polystyrene, C95 to 82pF polystyrene, just what I had in
the junk box, stability very good.
unquote ==== Yes ,polystyrene caps are excellent for VFOs I built a single FET 80 m VFO? (ugly construction)for the " UK Intermediate Licence" training , running on a 9V battery , all on an open chassis. Once in operation for 5 minutes drift was no more than 50 Hz longer term . Frank? ,? GM0CSZ / KN6WH??????? in IO87AT
On Mon, Jan 2, 2017 at 11:53 PM, Alfred fpdbase@... [BITX20] <BITX20@...> wrote:
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ohwenzelph@... [BITX20] wrote:
>
> Who has "changed the on-board chip capacitors to leaded polystyrene
> types and report
> good stability." With the BitX40v3, and
>
>
> which caps did you replace and with what values?
>
> Jer aa1of
>
> ?
>
> .
>
>
I changed C91, C92 to 680pF polystyrene, C94, C95 to 47pF polypropylene,
C96 to 150pF polystyrene, C95 to 82pF polystyrene, just what I had in
the junk box, stability very good.
Cheers Alf vk2yac
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