Re: DX-7.... explain this!
Any updates concerning the Lithium battery thing?
I know that Graupner (=JR) TXes here do strange things, if this battery runs flat after some years or a decade.
So does the BIOS system of your PC.
I would definitely check first, if such a battery is used in your TX, and if yes, if replacing it solves the problem.
Maybe a bad batch of these batterys were used. S*** happens.
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