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January 8th 08, 09:39 PM
posted to rec.radio.shortwave
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Scratchy RF gain knob on 535D
labtech_one wrote:
You can use contact cleaner, or just plain ole WD40, spray and work the control back and forth a few times to break loose the 'dirt' and then spray again to rinse it away. Wait about 1 hour, for the spray to dry, before using the radio again. WD and some contact cleaners are a) flamable and/or b) conductive "CelticDude" wrote in message ... Hello all, I took a break from SWL for a few months (competing obsession), and when I went to listen a couple of nights ago, I got a scratchy sound from the speaker when adjusting the RF gain knob. On stereo equipment, when that happens I pull the offending knob off, and spritz the pot with some Radio Shack Tuner Control Cleaner & Lubricant. However, I don't want to start spraying stuff into my good SW radio without finding out what the risks, if any, are. The radio is a JRC NRD-535D, bought on EBay about a year ago. Until now it's been working pretty well. Is the spray cleaner the way to deal with this problem? Or is there a better way to deal with it? What do you all recommend? Thanks, DWP Huh? How hot a spark can you make with 6 V? |
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