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If the sound of the noise fluctuates in step with a color-changing LED, that settles it.

The fix is simple. Take the ground wire loose from where it's soldered to the front-panel circuits. The original meter lamp's ground wire is not suitable to use for color-change LEDs.

Or just cut the ground wire. Strip the end and splice a wire long enough to reach the big filter cap towards the rear of the main pc board. On the solder side of the pc board, directly under that cap, solder the end of the new ground wire to the ground foil under that big cap.

Usually fixes this fault.

73

[QUOTE="nomadradio, post: 627921, member: 22"] If the sound of the noise fluctuates in step with a color-changing LED, that settles it. The fix is simple. Take the ground wire loose from where it's soldered to the front-panel circuits. The original meter lamp's ground wire is not suitable to use for color-change LEDs. Or just cut the ground wire. Strip the end and splice a wire long enough to reach the big filter cap towards the rear of the main pc board. On the solder side of the pc board, directly under that cap, solder the end of the new ground wire to the ground foil under that big cap. Usually fixes this fault. 73 [/QUOTE]

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