"Mark D. Zacharias" wrote in message ...
Blow out the tuning capacitor with a compressor. Fairly common problem.
Naturally happens more towards the lower end of the scale, since this is
where the tuning capacitor's vanes are fully meshing.

Mark Z.

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"Colin B." wrote in message
...
Hey all;

Next on my agenda is to fix up an old but fantastic tuner I have here;
a Pioneer TX-9800.

Now I'm not looking at doing a full alignment--that can be left for the
professionals. However the major problem seems like it should be easily
fixable. Basically, the tuning jumps around terribly. If I'm tuned to
my favorite station (93.7, CKUA!), it'll be fine for a while and then
disappear entirely. To retune it, I have to go to 94.1; and the tuning
capacitor sounds (and looks on the meters) NOISY when I turn it.

Any pointers? Once I get it out of my rack, I'm going to look for crap
on the tuning cap, but beyond that, I'm not sure.

Thanks!
Colin

Vacuum instead of blow, and use a paint brush with long, soft
bristles (natural preferable to synthetic, less chance of static build
up) to knock the dust and stuff off the capacitor's plates into the
vacuum's airstream. Brush the dust out of the rest of the tuner while
you're at it.