Bravo Delta,
I've read almost every message since the summer of 2022, but I don't remember a melted transformer. Could you give me a link to what I missed.
If you read my post today about v2, then I don't need to write more. Use a current-limiting power supply and an antenna that is tuned to the frequency and you will have few problems. Another important thing is the quality of the mechanical and electrical connections.
The components go through a lot of checks during production, but despite this, failures can occur.
The last time I opened the device was to replace the CR2032, because the date display went crazy.
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Gyula HA3HZ
HA3HZ