Hi Don, thanks for the reply.
>check the green winding, it is easy to pull the leads too
>much and end up with a badly tinned lead.
Absolutely correct - that was the problem, RF gain now restored.
73
Trevor G0KTN
-------- Original Message --------
Trevor,
An RF Gain with severely limited range is normally an indication that
there is something wrong with T2 - check the toroid leads for good
tinning. If you cannot see a bit of tinned lead on the toroid side of
the board, it probably was not tinned close enough to the core -
especially check the green winding, it is easy to pull the leads too
much and end up with a badly tinned lead.
73,
Don W3FPR
Trevor Smithers wrote:
> I've just completed part 1 of the 3080 build and re-done the alignment. All appears well,
> 40/20 rx working as expected.
> However I've noticed that the rf gain control (R1) appears to now have very limited
range
> in fact it hardly seems to make any difference at all - is this because the rest of the
build
> has yet to be completed or does it indicate a possible problem. When I did the
> resistance check of R1 I got around 900 ohms.
>
> 73 to all
> Trevor G0KTN
>
>
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