[srawcliffe]

Hi,

Recently acquired an excellent Eddystone 730/4 and almost everything seems to be OK ... except the BFO.

When I move the knob from the off position to past the detent and into the "on" zone, there's just the slightest of clicks from the speaker, as if something were happening ... but no beat tone.

I've replaced the associated valve (V12), but no change.

Has anyone else had this fault, and/or can anyone suggest a fault-finding strategy? I don't own a signal generator or oscilloscope, so am limited to what can be tested using a meter.

Despite having held a full licence for 40 years, I am not the world's greatest technician, so all suggestions and inspiration will be gratefully received!

73
Steve
G4YXU