Rich,
I suggest you look closely at the connectors between the control board
and the RF board for a poorly soldered or unsoldered connection.
Especially pins 35 and 36 of control board P2 and RF board J7. Also
pins 1, 2 and 5 of control board P3 and RF board J8. These latter AF
control pot lines go to RF Board P1 pins 1, 2 and 3 and Front Panel
board J1 pins 1, 2, and 3.
The reason I suspect an unsoldered connection is that you caused the
problem when you removed/re-installed the control board - and in the
process, something moved. An unsoldered connection can work just by
physical contact for a while, but will break the connection if it is moved.
You can use your ohmmeter to check continuity along all these paths -
use the schematic to see where the wire starts and ends up.
73,
Don W3FPR
RICHARD MC KINNEY wrote:
I removed the control board as suggested in 065 of the guide. Heard relays
click as the book said. But when I put the control board back in I lost Rx. I
know it worked good on 40 meters as I played with it a few days after alignment
II procedure. I can inject a signal on 40 meters and the s meter pegs out but
it is just barely audible in the headphones. The side tone audio is ok when I
key. It's like the Rx is muted. I can touch pin 2 and 3 of the audio amp and
hear finger noise. This Rx problem is not from something installed wrong as it
worked fine before I removed the control board. Please somebody tell me I can
just push some button and clear up the Rx problem so I can chase the problem on
Tx. 73 Rich WB4VFN
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