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39-19 Background Noise
#3

(02-20-2017, 01:14 PM)Radioroslyn Wrote:  Hi,
Looks like you did a swell job restoring it. You may want to consider that the noise is coming from the AC mains. Things like cell phone and laptop chargers and computer P/S use what are called switching p/s (read no power transformer) and these thing generate a LOT of Garbage on to the mains. The worst of it is when the battery is low in the devise that is being charged up. This puts the most load on the p/s. Unplug all of this modern junk and I'll bet you will a big improvement.

GL

No. It's an internal problem. I installed X1Y2 safety caps on the line in and ran this radio off an isolation transformer. I've done scores of restorations and have isolated all the area noise sources. The hardest one to track down was a dimmer on a lamp two floors up and on the other side of the house!


Messages In This Thread
39-19 Background Noise - by Olskuul - 02-20-2017, 12:47 PM
RE: 39-19 Background Noise - by Radioroslyn - 02-20-2017, 01:14 PM
RE: 39-19 Background Noise - by Olskuul - 02-20-2017, 02:12 PM
RE: 39-19 Background Noise - by morzh - 02-20-2017, 03:31 PM
RE: 39-19 Background Noise - by Olskuul - 02-20-2017, 05:20 PM
RE: 39-19 Background Noise - by morzh - 02-20-2017, 06:17 PM
RE: 39-19 Background Noise - by Olskuul - 02-22-2017, 08:23 AM
RE: 39-19 Background Noise - by Radioroslyn - 02-22-2017, 11:34 AM



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