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37-650 buzzing
#3

Thanks Ron. I have replaced the electrolytic capacitors. I'm not able to get at paper caps buried in the tuner section. I've re-checked connections and components and everything looks to be where it should. There was a 'jumper resistor' that ran between the 2 6F6 tubes that wasn't on the schematic so I removed it. I've got to replace another resistor (spec is 9k 2w...reading at 14k). Of the 2 6F6 tubes, only 1 will glow blue (maybe more violet after looking closer). When I switch the 2 tubes, the other will go blue. It appears to be more about the socket? I tested both tubes and both are weak-marginal at best. Could bad tubes create the buzzing (definitely more buzz than hum)? I'm not sure this means anything but when I pull the tube from the location that glows and turn the radio on...silence. Replace the tube...buzz.
Bill


Messages In This Thread
37-650 buzzing - by wil - 01-23-2011, 12:15 PM
Re: 37-650 buzzing - by Ron Ramirez - 01-23-2011, 10:07 PM
Re: 37-650 buzzing - by wil - 01-24-2011, 01:14 PM
Re: 37-650 buzzing - by Ron Ramirez - 01-24-2011, 05:21 PM
Re: 37-650 buzzing - by philcoradio1234 - 01-24-2011, 07:32 PM
Re: 37-650 buzzing - by Ron Ramirez - 01-24-2011, 08:03 PM
Re: 37-650 buzzing - by wil - 01-25-2011, 11:04 AM
Re: 37-650 buzzing - by Ron Ramirez - 01-25-2011, 11:24 AM
Re: 37-650 buzzing - by wil - 01-25-2011, 05:08 PM
Re: 37-650 buzzing - by Ron Ramirez - 01-25-2011, 05:20 PM
Re: 37-650 buzzing - by wil - 01-26-2011, 03:16 PM
Re: 37-650 buzzing - by Ron Ramirez - 01-26-2011, 07:46 PM
Re: 37-650 buzzing - by wil - 01-27-2011, 06:56 PM
Re: 37-650 buzzing - by Ron Ramirez - 01-27-2011, 09:00 PM
Re: 37-650 buzzing - by wil - 02-03-2011, 04:14 PM
Re: 37-650 buzzing - by Ron Ramirez - 02-03-2011, 08:06 PM
Re: 37-650 buzzing - by wil - 02-05-2011, 01:05 PM
Re: 37-650 buzzing - by Ron Ramirez - 02-06-2011, 01:42 AM



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