"Karel Jansen" wrote in message .. .

I expect it is a capacitor getting old.

This is what I was going to say, I just couldn't work out where in
this tangled thread to say it!

I have made several '70s tuners usable again by replacing aged
electrolytic capacitors. These dry out over time, especially where
there are lots of bulbs in the unit to light up the display.

I have recently upgraded to digital preset tuning, on a lovely JVC
FX-1010 I saw going cheap. Sensitive, low noise, two antennas,
accurate signal readout, optically isolated gubbins, mmm...

ALex