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Michael Black[_2_] · February 11th 17, 07:49 PM posted to rec.radio.shortwave

On Fri, 10 Feb 2017, wrote:

On Friday, February 10, 2017 at 11:21:08 PM UTC-5, wrote:
Have you tried powering it on with AC?

Or a different set of batteries?

The set needs a 9V DC external power adapter . The tip is NEGATIVE(-)!

I wsa trying to remember if the receiver had any "backup" inside, like a
tiny nicad or just a supercap. If either were there, they might need a
bit of being on before they could be of value. I'm not sure why them not
charged up would cause the radio to not work, but I've seen boomboxes that
needed the backup batteries or they'd not work. But I remember losing
things when the regular batteries died on the Grundig, so I suspect
there's no backup.

The 500 and 700, which I realize are in another class and maybe era,
there's lots of connectors that seem to oxidize and need some cleaning, if
just unplugging and plugging. But I've not really looked inside the 400.

Maybe just leaving it powered and on for a bit might clear things up, I
doubt it can hurt.

Michael