Speaking of changing out pots or encoders on the front panel, my four encoder knobs to the right of the column knobs were really stiff to push on. I mean so stiff, I don't think they could ever be removed without some sort of tool(s). Has anyone else had this issue and gotten the knobs removed? I bought extra knobs and thought if I had to remove them, I would maybe slice them along their length carefully with a dremel to release the tension and just replace them.
Sent from my iPad On Jul 8, 2012, at 10:02 AM, "Guy Olinger K2AV" <[email protected]> wrote: > Those knobs are actual potentiometers, not encoders, acting as voltage > dividers off a fixed voltage, which are followed an an A/D chip which > converts the wipe voltage to a three digit number which is multiplexed > and sent to the MPU. The audio does NOT flow through the pot. The > setting of the pot is turned into numerical advice to the MPU. > > If the voltage on the pot wipe goes out of range or the wipe loses > contact, the number sent to the MPU will be weird. It won't be > scratchy like an analog volume pot gone bad, just go to unpredictable > and undesired volume settings. The pots are not killer to change out, > but you need moderate to good soldering skills to do it. I bunged one > and had to change it out. Done this on both my K2 and K3 now. > > 73, Guy. > > On Sun, Jul 8, 2012 at 10:40 AM, Matt Zilmer <[email protected]> wrote: >> Many K3 users have seen this same rotation problem with the AF/SUB and >> RF/SUB controls. Try adjusting the set screw(s). If that doesn't >> work, you may need to contact support for new ones. With early K3s, >> there were some problems with these controls. >> >> Not sure about your audio/volume problem though. I'd contact support >> on this too. >> >> 73, >> matt W6NIA >> >> On Sun, 08 Jul 2012 08:45:35 -0400, you 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 >> ______________________________________________________________ >> 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 > ______________________________________________________________ > 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 ______________________________________________________________ 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
