[amsat-bb] TR-751

Dear friend!

I like to ask you:

If my Kenwood TR-751 is in scanning mode I hear impulse noise(about in every 0.1 second) from speaker if I near the speaker(5cm) or use a headphone if volume is 12clock position. Can you check it with other TR-751? What cause this problem? Other people doesnt have this problem with TR-751. I realised that if I rotate the main dial I hear also this sound .Why?

Thanks Zoli/HG5AZR