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All good advice. And the tiny tantalum capacitor is C179. Not sure if it's always blue, but it's always tiny. It **MUST** be replaced or at least removed any time the AM modulation gets turned up, even a little. When C179 fails as a short, damage follows. This capacitor has the proper 25-Volt breakdown-voltage rating for legal 100% modulation ONLY. But a 35-Volt (or higher) rated cap lasts longer, and won't kill the relay, power supply etc.

73

[QUOTE="nomadradio, post: 788135, member: 22"] All good advice. And the tiny tantalum capacitor is C179. Not sure if it's always blue, but it's always tiny. It **MUST** be replaced or at least removed any time the AM modulation gets turned up, even a little. When C179 fails as a short, damage follows. This capacitor has the proper 25-Volt breakdown-voltage rating for legal 100% modulation ONLY. But a 35-Volt (or higher) rated cap lasts longer, and won't kill the relay, power supply etc. 73 [/QUOTE]

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