Big, Bad*s*, and ugly 660L
Posts: 7,323
Threads: 270
Joined: Dec 2009
City: Roslyn Pa
Restrung the cord for the arrow mask and started in on the SG voltage problem. After half a day of troubleshooting I found that I had installed a wrong value resistor. Now the screen buss is up to 75v. Hum was found to be a bad resistor over in the tone circuit. Also had an intermittent, volume would change all by it self. Was a bad connection at the ant post. Disassembled the spkr plug someone in the past did a bad job repairing the wiring. Cleaned it up evened up the wires and add some heat shrink tubing to give it a bit of strength. I was playing with it a bit and changed the value of #14 and it improved the high frequency response of the audio. Sound really good!
It's been playing for about 8hrs with out a problem. If I could only get that 42-854 to do the same!!! Waiting on a few small parts bulbs and such. Also want to do the SW/LW alignment BC and IF are good.
Currently It's playing Information Please, I always feel smarter after listening to it!
Terry
Messages In This Thread
RE: Big, Bad*s*, and ugly 660L - by Radioroslyn - 06-26-2016, 08:33 PM
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here is this one
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here is a link to the schematic .
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that great news glad it worked out for you !!
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