04-21-2024, 06:11 PM
Hello Everyone;
I picked up a British made Bush DAC 90A today, it was the second generation in a series of post war AC/DC radios made by Bush Radio. In any event it is a series string set, much like an AA5, but unlike an AA5 the audio output tube runs at 190 VDC. What I was wondering is if it would make sense to rewire the set to include a voltage doubler for the plate/anode voltages whilst operating the tube heaters from the 120 volt power line (string adds up to 116.6 volts not including the pilot lamps)? https://www.radio-workshop.co.uk/service...dac90a.pdf
When I'm asking about a voltage doubler is it possible to use the UY41, a half wave tube rectifier, as the first of the diodes, whilst using something like a silicon 1N4007 as the second diode?
Regards
Arran
I picked up a British made Bush DAC 90A today, it was the second generation in a series of post war AC/DC radios made by Bush Radio. In any event it is a series string set, much like an AA5, but unlike an AA5 the audio output tube runs at 190 VDC. What I was wondering is if it would make sense to rewire the set to include a voltage doubler for the plate/anode voltages whilst operating the tube heaters from the 120 volt power line (string adds up to 116.6 volts not including the pilot lamps)? https://www.radio-workshop.co.uk/service...dac90a.pdf
When I'm asking about a voltage doubler is it possible to use the UY41, a half wave tube rectifier, as the first of the diodes, whilst using something like a silicon 1N4007 as the second diode?
Regards
Arran
