Mark, if the CW filter is not centered in the passband, try
aligning coil L4 on the PBT (80979) board. This procedure is
described in my Corsair manual (1st printing) on page 3-13.
With the CW filter switched out, and the antenna disconnected,
switch between sideband normal (SB-N) and sideband reversed
(SB-R). While doing this, carefully listen for the change in tonal
quality of the white noise (hiss). Adjust coil L4 on the PBT board
until there is no apprecaible change in the hiss when switching
sidebands. Your CW filter should now work correctly with
the PBT control centered. Make sure the rig is warmed up. I found
that the adjustment has a tendency to drift a little.
73, Bob WB2VUF
--
FAQ on WWW: http://www.contesting.com/tentecfaq.htm
Submissions: tentec@contesting.com
Administrative requests: tentec-REQUEST@contesting.com
Problems: owner-tentec@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|