This indicates that the Lo Band VCO (up through 20M) is unlocked. If
you change the Bandswitch to 15M, the Hi Band VCO takes over and will
show about 35 MHz if unlocked.
In either (or both) case(s), if board reseating doesn't fix the problem,
it will probably take an alignment to fix it. The Lo Band VCO is
actually "free-running" a little high, and so may be on the edge of
locking. If so, just adjusting L501 per the Service Manual "might" fix
it.
The TR-7 is a very complex piece of equipment, and if you're not
comfortable working on it there are several guys that do excellent
repair work at reasonable prices. A couple of them are listed at
<http://www.wb4hfn.com/DRAKE/DrakePartsService.htm>.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>
[email protected] wrote:http://www.wb4hfn.com/DRAKE/DrakePartsService.htm
My TR-7 won't lock onto frequency with the internal VFO selected. The
only way it will work is off the R-7 VFO. The frequency readout shows
about 17900 Khz until you go to the R-7 VFO, then it locks on OK. At
first I could correct this problem by reseating boards but now that
has no effect. Reseating the boards only corrected the problem for a
little while then it would go out again. Can anyone offer any
suggestions about where to look for this problem. The only way it will
work now is off the R-7 VFO. I would appreciate any help you can offer.
Thanks and 73,
Terry W8NJR
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