KB FB10 toaster

[Yorkie]

I got one of these at the last Golborne event, Someone has already changed a couple of caps and the mains smoothers.
Having switched on noise from the speaker, which has also been repaired, but no stations.

So it will give me the chance to try out Yorkie's signal injector/tracer at the same time

cheers Mark

Yuors looks like the FB10/2 later version with the 9 pin valves Mark, from serial number 110,001. (A lot of FB10 radios produced if the numbers started at 000,001!).

Try injecting a signal at pin 2 of the output valve. If you get a loud tone from the speaker, that exonerates the audio stage. If no signal from the speaker - fault in the audio stage.

If the audio stage is OK, inject a signal at the slider of the volume control, and if the detector/AVC stage is working, again, you should get a loud tone from the speaker. If you got such a tone at pin 2 of the output valve, but not at the slider of the volume control, suspect a fault in the detector stage. (valve u/s?).

Try the RF tracer probe on the slider of the volume control. If the mixer and IF stages are working, you should hear tunable signals in the speaker of the injector/tracer, because when used with the RF probe, the tracer performs the same role as the detector/output stage of the radio.

If no tunable signals there, try the RF probe on pin 1 of V2 - the input to IF amp, (from the secondary if the first IFT/output of the mixer stage).

If no tunable signals there, save it till the 25 March Swapmeet and let 'Bodgit and Scarper' sort it out for you, while you try to keep Freya under control and I eat all the pies!

Hope that helps a bit Mark.

David