The 360 degree rotation of the knob could be a cracked knob or loose set screw in the knob.
Loosen the set screw in the knob and pull it off. Then inspect it for cracks. If you find no cracks then reinstall it and tighten the set screw GENTLY. After doing the above, if it still rotates 360 degrees, follow Don's suggestion. 73, Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member On Sun, 08 Jul 2012 09:12:41 -0400, Don Wilhelm <[email protected]> wrote: >Jan, > >It sounds like it may be just a broken AF Gain control. Contact support >- if you have the capability to repair the board yourself, then a part >can be sent to you, but if not, the whole board will have to go in for >repair. > >73, >Don W3FPR >On 7/8/2012 8:45 AM, Jan Ditzian wrote: >> I suddenly came up with several problems related to audio volume on my >> K3, MCU 4.51. >> >> I was listening on USB with slow AGC and I noticed that the volume would >> suddenly drop and remain low until I hit the T/R button, whereupon it >> would come back again, and then disappear. I switched to fast AGC and >> the problem diminished but did not disappear. So I reached for the >> audio volume control and discovered that it now turns 360 degrees >> without a stop, although there is a slight detent at the regular >> stopping point. I tried to turn AGC off, and although the display >> indicates that it is off, there appears to be no increase in volume. I >> now feel that the volume is lower than it was when I first built the unit. >> >> There may be some troubleshooting to do here. I notice this less with >> strong signals. I guess I would like to know what to do about the >> rotation first, and then pursue the overall volume problem. >> >> Thank you, >> >> Jan, KX2A >> > >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[email protected] > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
