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How to Repair Vintage Tube Radio Filter Capacitor Fix Hum Antique Receivers - YouTube
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Safety
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The sound of bad filter caps - hum and ghost notes. - YouTube
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That Elusive Valve Amp Sound, For Not A Lot! (There Has To Be A Catch) | Hackaday
Capacitance Multiplier Power Supplies
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That Elusive Valve Amp Sound, For Not A Lot! (There Has To Be A Catch) | Hackaday
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Eliminating Troublesome Hum & Buzz Created By Electric Guitars - ProSoundWeb
Easy solutions to Radio Frequency Interference
