Are all 116X electrolytics negative ground? - Printable Version

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+--- Thread: Are all 116X electrolytics negative ground? (/showthread.php?tid=5439)

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Are all 116X electrolytics negative ground? - rocketeer - 11-08-2012

I've finally caught up a bit and gotten back to the 116X. My eyes are getting funny and I'm driving myself nuts trying to trace the schematic so before Jack Daniels and I settle in for the night, are all 116X electrolytics negative ground? The radio played and then I replaced the electrolytics. Now it hums and with the variac set at 90 volts, the ammeter slowly climbs up and goes past 3 amps before I shut it down. Nothing smokes or acts goofy otherwise. I've tripled checked (and more) the lytics and they seem to be installed correctly, hence the question, do I have one (or more) bass ackwards?

[Image: http://i863.photobucket.com/albums/ab191/rocketeer_2010/Radio%20schematics/philco116xschematic-1b.jpg]

[Image: http://i863.photobucket.com/albums/ab191/rocketeer_2010/Radio%20schematics/philco116xschematic-1c.jpg]

Thanks,
Larry

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RE: Are all 116X electrolytics negative ground? - Ron Ramirez - 11-08-2012

Larry

All are negative ground save one: the 10 uF, 100 volt cap connected from B- (center tap of high voltage secondary) to ground. That one has its positive lead going to ground, and the negative lead to B-.

Before I hit the "Post Reply" button, one clarification: Caps (103) and (104) have their negative leads going to B-.

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RE: Are all 116X electrolytics negative ground? - rocketeer - 11-08-2012

Thanks Ron, much appreciated. I think I'll let my head clear for a day and tackle it tomorrow evening.

Larry

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