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Old 9th Oct 2011, 12:24 pm   #23
westcliff
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Join Date: Jan 2011
Location: Essex, UK
Posts: 396
Default Re: KB FB10 "Toaster"

I have done a bit of testing to try to identify the problem with the set and the last thing I tested was the lamp limiter. The 100w bulb was fine, but the 3A fuse had blown. What does this tell me about the radio I was testing?

Something else has been puzzling me - when I replaced the capacitor can with two single capacitors, that's all I did. Do these old capacitor cans additionally contain resistors? I read in another thread about a 680K resistor in a can and now I wonder of there was a resistor in my old can.

What I did was to join the -ve ends of the new capacitors together then attach them to the same wire as was connected to the -ve terminal of the old can. Similarly, the +ve ends of the new capacitors were attached in the same way that the two old +ve can terminals had been. The set then did work on the lamp limiter with the lamp on, until I switched the lamp out of the circuit.

Other tests I have done show that the set's plug, 3A fuse, power lead and on-off switch are all fine.

Gus.
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