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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