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audio woes on the 38-5
#14

After 4 hours tiding up solder joints, changing a few resistors and micas in the area of the 6J5 I'm still no further ahead. No improvement. The set still howls and whistles and at full volume motorboats. I tried several different 6A8's with no improvement. I tried listening for the oscillator signal on a known good radio that’s nearby and that seemed to work. I was not able to get a strong station to come in very clear on the 38-5 but the one I was using was at 620 and I could hear the faint howling / whistling that was in the background at around 1100 on the dial on my freshly restored hippo I placed next to it on the workbench. When I turned off the 38-5, I could hear the whistling / howling go away on the hippo. So I think the OSC is working or trying to.

With my antenna wire clipped on to the grid of the 6K7, and my finger on the grid of the 6A8 tube, I can get that station AM 620 coming through loud and clear, sounding as it should. But that's the only station I can get. The local station (much stronger signal) on the upper end of the dial at 1470 doesn't come through with the same antenna / finger configuration.

Any thoughts on what to try next? I'm at a loss. I'm about ready to gator wire a new tube socket to the 6J5 and try that tube externally in a new socket to see if I'm not getting a good connection or have a damaged socket.

Greg V.
West Bend, WI
Member WARCI.org


Messages In This Thread
audio woes on the 38-5 - by NostalgiaRadioTime - 01-24-2018, 10:30 PM
RE: audio woes on the 38-5 - by morzh - 01-24-2018, 10:56 PM
RE: audio woes on the 38-5 - by Radioroslyn - 01-26-2018, 12:15 PM
RE: audio woes on the 38-5 - by morzh - 01-26-2018, 01:41 PM
RE: audio woes on the 38-5 - by Ron Ramirez - 01-26-2018, 11:12 PM
RE: audio woes on the 38-5 - by Radioroslyn - 01-26-2018, 11:49 PM
RE: audio woes on the 38-5 - by morzh - 01-28-2018, 09:53 AM
RE: audio woes on the 38-5 - by Steve Chambers - 01-28-2018, 10:14 AM
RE: audio woes on the 38-5 - by NostalgiaRadioTime - 01-28-2018, 06:39 PM



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