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philco 48-1270 burning out r315/ updates
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I just got a philco console I stated above and when I first got it it had no sound at all. Total silence just wanted to see what I was looking at. I did the preliminary tests that are written in the schematic info and I was getting low volts on the first few test points. Only 200 volts instead of 250 from the rectifier ,a 5u4g. so I went ahead and replaced all the electrolytics and any other resistors it said could be bad . I also found two resistors blown. The r 315 which is listed as a screen dropping resistor 3300 ohm was burned right in half and the r 313 82,000 ohm was reading 1.5 megs after I replace them both. And I restored power the 3300 plohm resistor burned in half in about 5 seconds. I have ordered a new rectifier tube and two new 6v6 power tubes any other advice as to what could cause this I know it's a lot to think about , could it also be a bad 7h7 tube , or should I just start checking and replacing all caps attached to the resistors

http://www.nostalgiaair.org/PagesByModel...013617.pdf


Messages In This Thread
philco 48-1270 burning out r315/ updates - by magicclocks - 04-11-2012, 06:50 PM
RE: philco 48-1270 burning out r315 - by John R - 04-12-2012, 12:47 PM
RE: philco 48-1270 burning out r315 - by John R - 04-13-2012, 12:37 AM
RE: philco 48-1270 burning out r315 - by codefox1 - 04-13-2012, 02:16 AM
RE: philco 48-1270 burning out r315 - by rghines1 - 04-14-2012, 09:06 AM
RE: philco 48-1270 burning out r315 - by Arran - 04-14-2012, 11:38 PM



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