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My next project, dad's Philco 40-81
Arran
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#8

01-21-2013, 11:19 PM
I looked up the schematic again after this and it seems to note B+ readings of 69 volts so the special battery pack may have been in the 70 volt range rather then 67-1/2. I'm sure you could connect 72 volts to it without cooking anything, but if you are worried about it you could connect a few silicon diodes in series with the + side, or between B+ and B- to cut it down.
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Arran
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RE: My next project, dad's Philco 40-81 - by Arran - 01-21-2013, 11:19 PM



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