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There is some strange noise I have a problem with.It maintains same low level and does not respond to the change in the volume.Let us just say we are between the stations and raise the volume. There will be certain noises, crackling and others. That would be the best comparison to it. It is not loud, and when the set is tuned to the station I can't heat it at all, but with a volume level way down it is heard pretty well. I was told it was the driver tr-r, I tried another one with no positive result.The radio's performance is outstanding otherwise. Do not think it is a band switch. Any ideas? Thanks.

http://www.nostalgiaair.org/PagesByModel...013139.pdf