Transmitter repair.

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jensenbreck
Beiträge: 1
Registriert: 08.11.2017 10:37:26

#1 Transmitter repair.

Beitrag von jensenbreck »

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.
References:
https://forums.adafruit.com/viewtopic.php?f=5&t=15342

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