Question about X-10 (RTM75) Transceiver

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Tm751 My TM751s activate with every command from my remote but do not send a reliable X10 signal to appliance or lamp modules even on the same circuit even though the TM751 relay kicks in every time. Whats wrong. (FWIW I have an MSEE degree)

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Re: tm751

Is it an appliance module x10 otherwise it's not strong enough

Posted on Dec 05, 2007

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Transceiver signal interference

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Dec 23, 2007 | Transceivers

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Working principle of super heterodying receiver

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I experienced very similar or the same problem with FT-840. When power is inceased over about 50 W, an AM on RF signal arises. Even when TCVR is supplied from accu and connected to dummy load. Period of interferencing signal is about 7.5 ms (130 Hz), so it cannot be hum from mains. I have not opened the PA block yet but i guess, it could be caused by damaged capacitor(s). Jiri

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XE103 stealing bandwidth

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