[Elecraft] KX1 3080 module part 1 test

Trevor Smithers tsmithers at cix.co.uk
Wed May 28 12:52:00 EDT 2008


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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