OK. Are the lamps, or their 220VAC wiring, anywhere near the antenna? Are lamp dimmers used around the antenna, feed lined or receiver. I have an idea (attached), but uses a triac. These are the noisest (RF wise) when that are partially on. My circuit would have it either on or off.
The attached circuit is just off the top of my head. When I1 is ON, the current through R1 generated a voltage that drives Q1 and shorts out the LED in U1. If I1 burns out, Q1 turns off and allows the LED in U1 to turn on and trigger the triac ON, so I2 lights. This is untried and the component values are estimates.
It might be modified so Q1 drives a relay that controls I2. Maybe Ill add that.
Ken
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