SW-7800 Alignment & Problems

[Mark Johnson/Ontario/IBM]

Hello everyone....

I'm working on an SW-7800 SW Receiver. The radio works but the alignment
was out. I started going through the procedure last night and ran into
problems.
By ignoring the procedure (never a good thing, but as a last resort), I
could get all bands working except the high band (29 - 30 mhz). When that
band is selcted, the display reverts back to a freq range of 27 mhz.. And
its "unstable" .It's almost like I can't get the equivalent "Het Osc" going
for that band (29-30 mhz)....Not the right term, but I think I make the
point. According to my Freq Counter, the VCO is putting out the necessary
50.xx to 80.455 mhz signal, so its  something in the synth board....I
think...
Any ideas that might point me to a fix before I start scoping???

Thanks Team!

Mark V. Johnson
VE3DJU

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