If the tuning cap is freely moving and when strung, the drum won't move, it's almost certain to be wrongly strung. You must have the right number of turns on the spindle and in the right direction, and when the cord leaves the drum, it must go the right way round. There are three service sheets covering the FB10 - Trader, R&TV, and ERT. Only the Trader and ERT sheets show a diagram for the stringing, and I think the ERT one is clearest. I've attached it and hope it might clarify the arrangement Mark. Not the position of the drum with the tuning cap fully enmeshed, and make sure the drum is tightened in that position so that when the cap is fully open or fully closed, the cord enters and leaves the drum as it should. (Entry slots at top with the cap fully closed).
I think you said earlier that if you inject a tone at the volume control centre pin you get a tone out of the speaker, so if the set is dead, you need to check with the tracer RF probe at say pin 5 of V3 (from IFT2 to detector), and if no sigs there, pin 1 of V2 (Grid, from IFT1) to see if you can tune any signals in. If not, the problem is most likely in the front end.
Best of luck with it!
I think you said earlier that if you inject a tone at the volume control centre pin you get a tone out of the speaker, so if the set is dead, you need to check with the tracer RF probe at say pin 5 of V3 (from IFT2 to detector), and if no sigs there, pin 1 of V2 (Grid, from IFT1) to see if you can tune any signals in. If not, the problem is most likely in the front end.
Best of luck with it!
Regards, David.
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
