The fans are still but I still hear it. Almost like some switching PSU noise.
Adi 2e0ttx On 27/06/2011 15:21, Guy Olinger K2AV wrote: > Check to make sure that the cables routed in front of the fans are not > touching. A light touch will result in a sound like that. It will > change or go away with the fan speed. > > 73, Guy. > > On Mon, Jun 27, 2011 at 9:10 AM, Adi Andrei<[email protected]> wrote: >> I have the same thing happening, similar series K3 (5k something) , also >> assembled in March. >> >> Adi >> 2E0TTX >> >> >> On 27/06/2011 13:38, Joe Harris wrote: >>> I have very similar symptoms in my K3/100 (SN 5284) that I assembled in >>> March. It makes the sound even if I am in TX test mode. Again, no >>> performance issues, just a slightly bothersome squeal / whine. >>> >>> >>> >>> On Sun, Jun 26, 2011 at 8:23 PM, Geoffrey >>> Wolf<[email protected]>wrote: >>> >>>> First off it was a great Field Day and my new K3 impressed me extremely not >>>> only in performance but in it's functionality. >>>> >>>> To kick off Field Day I installed a new KPA100 into the K3. I did all the >>>> necessary TX gain calibrations using a dummy load. >>>> >>>> One thing I noticed immediately was that I was hearing a very high pitched >>>> squeal coming from either the PA board or possibly the KIO3 (the board the >>>> amp plugs into). The squeal seems to vary in frequency each time the >>>> transmitter keys up (can only hear it when the radio is in TX). The squeal >>>> is not very loud but its loud enough for me to hear it if I listen closely. >>>> It doesn't seem to be power related. The squeal is there even if the radio >>>> is in TX but no power going out (RF Pwr set to 0W). The closest thing I can >>>> compare the sound to is perhaps a tiny leak in an air hose. Is this typical >>>> of a bad solder joint or something? >>>> >>>> This squeal only pertains to the new KPA100 installation. Before the amp >>>> was installed I didn't hear a thing. >>>> >>>> I should also note that nothing appears to be affecting performance. Puts >>>> out 100 watts no problem. Clean modulation, etc. >>>> >>>> -------------- >>>> Geoffrey Wolf >>>> AB3LS (Amateur Radio Callsign) >>>> University of Pittsburgh '14 >>>> [email protected] >>>> [email protected] >>>> >>>> ______________________________________________________________ >>>> 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
