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Picking up FM radio on Randall RGT100
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<blockquote data-quote="hypernovablast" data-source="post: 57309" data-attributes="member: 2226"><p>Thanks for the quick reply kc2eeb.</p><p></p><p>I tried the master and gain controls on both channels and this has no effect on the radio interference. Also tried the tone, presence, and reverb controls with no effect. The RFI volume never changes except when I move the power cord causing a change in reception (or possibly a change in grounding?). So I guess it's safe to say the RFI is not going through the amplification circuitry.</p><p></p><p>Thanks for the advice on installing caps, but wouldn't the power conditioner be similar in that it's removing the RFI from the line before getting to the amp? Although, if the RFI is somehow being generated in the power cord, that's after the power conditioner. If that's the case, it seems that the shielding I tried on the cord would have done something, but it had no effect. Granted my tin foil shielding probably wasn't real technically sound.</p><p></p><p>Does anyone think installing a shielded power cable would help?</p><p></p><p>Could this be a grounding issue even though the power cord connections and chassis ground checked okay with a meter?</p><p></p><p>Thanks, Steve</p></blockquote><p></p>
[QUOTE="hypernovablast, post: 57309, member: 2226"] Thanks for the quick reply kc2eeb. I tried the master and gain controls on both channels and this has no effect on the radio interference. Also tried the tone, presence, and reverb controls with no effect. The RFI volume never changes except when I move the power cord causing a change in reception (or possibly a change in grounding?). So I guess it's safe to say the RFI is not going through the amplification circuitry. Thanks for the advice on installing caps, but wouldn't the power conditioner be similar in that it's removing the RFI from the line before getting to the amp? Although, if the RFI is somehow being generated in the power cord, that's after the power conditioner. If that's the case, it seems that the shielding I tried on the cord would have done something, but it had no effect. Granted my tin foil shielding probably wasn't real technically sound. Does anyone think installing a shielded power cable would help? Could this be a grounding issue even though the power cord connections and chassis ground checked okay with a meter? Thanks, Steve [/QUOTE]
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Picking up FM radio on Randall RGT100
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