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Transmitter repair.

Transmitter repair.

Beitrag #1 von jensenbreck » 15.11.2017 13:15:19

Hi all.

Has anyone successfully repaired a transmitter? The transmitter on mine flashes the LED every 48 seconds (or so) but doesn't put out any RF, I am watching an SDR radio tuned to 433.9 Mhz and have the bandwidth opened right up, nothing being sent out when the light flashes. I could get a spare for £15 from Maplins but as a *very* last resort. The RF stage appears to be an ST4021 capacitively coupled to the "antenna".

Any replies most welcome

I didn't find the right solution from the internet.

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