22-03-2017, 06:30 PM
Problem found, it was V1, 20D2 heater is open circuit. Luckily I have a KB 880 which has the same valve line up.
I could also have looked at the 880 to see how the tuning drive went, but thats done now.
The KB 830 is working very well, I have given it a quick RF alignment, not the most sensitive of sets but more than adequate volume and easy to operate smooth 2 speed tuning.
I have changed the tome control as well as the track was burnt out, probably caused by a leaky tone control capacitor. It now has one of those 470k switched pots that Maplin sells.
I have been trying to carefully clean the glass dial, one has to be so careful that the print does not rub off, it is looking cleaner now and still has its print, after a good huff and careful wipe with a clean duster.
I am on the look out for a 20D2 valve with a working heater, I dont think these are so common, so will put something in the wanted sections of here and UKVRR.
Mike
I could also have looked at the 880 to see how the tuning drive went, but thats done now.
The KB 830 is working very well, I have given it a quick RF alignment, not the most sensitive of sets but more than adequate volume and easy to operate smooth 2 speed tuning.
I have changed the tome control as well as the track was burnt out, probably caused by a leaky tone control capacitor. It now has one of those 470k switched pots that Maplin sells.
I have been trying to carefully clean the glass dial, one has to be so careful that the print does not rub off, it is looking cleaner now and still has its print, after a good huff and careful wipe with a clean duster.
I am on the look out for a 20D2 valve with a working heater, I dont think these are so common, so will put something in the wanted sections of here and UKVRR.
Mike
