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Old 06-04-2015, 12:54 PM
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bigaudioal bigaudioal is offline
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Join Date: Mar 2012
Location: Gaithersburg, MD
Posts: 622
Motorola VT-71 modification question

Seen many posts regarding this set and selenium replacement and ballast replacing. The ballast rebuild seems easy (going with the capacitor/resistor network) as illustrated here back in 2012:

http://www.videokarma.org/attachment...9&d=1290802806

My question is concerning replacing the seleniums with diodes. I know the diodes have less resistance than the seleniums, so need to insert dropping resistors. My questions is where to insert them and do I need one for each diode? Also what are the specs of the dropping resistor(s) needed in addition to where to put them? Attached is a schematic showing each selenium as M1 and M2. Any assistance would be much appreciated.

Thanks.
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