HQ129X and Speaker Hum

[Dave Noon]

I have just finished recapping (including filters) my HQ129X - it works
just great. However, there is a low level hum coming from the speaker when
the audio and sensititvity gains are both turned down. There is nothing
heard through the earphones (150 ohm impeadance). Any thoughts on where the
hum may originate or how to find it?

Thanks

Dave  VA3DN
david.noon at odyssey.on.ca