10-18-2011, 05:14 PM
Richard is correct. Those switches do get gummy and WD40 is good for dissolving the grease.
More on the .015 caps. The preferred 'modern' replacements are AC-rated caps since its an AC circuit! Justradios sells them under the name of "safety caps" . Its not a must to use them but they do have some worthwhile advantages. He has a page on his site explaining all that. You can get them at Mouser as well. In the old days they used over-rated DC voltage caps but when a little leakage sets in they tend to heat up and pop with spectacular results
Their purpose is simply to bleed off some of the interference that may exist on the incoming power as well as bleeding off any rf from the radio that may bleed backwards. In some cases they aid the RF circuitry in finding a ground path back thru the power neutral. Value is not critical. You can use plain jane 630 vdc yellow caps but theres nothing to lose by spending a few cents more on the 'better mousetrap'.
More on the .015 caps. The preferred 'modern' replacements are AC-rated caps since its an AC circuit! Justradios sells them under the name of "safety caps" . Its not a must to use them but they do have some worthwhile advantages. He has a page on his site explaining all that. You can get them at Mouser as well. In the old days they used over-rated DC voltage caps but when a little leakage sets in they tend to heat up and pop with spectacular results
Their purpose is simply to bleed off some of the interference that may exist on the incoming power as well as bleeding off any rf from the radio that may bleed backwards. In some cases they aid the RF circuitry in finding a ground path back thru the power neutral. Value is not critical. You can use plain jane 630 vdc yellow caps but theres nothing to lose by spending a few cents more on the 'better mousetrap'.
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