Forgot to mention, That recording was made using QSK CW in the TX Test mode.
AB3LS On Thu, Jun 30, 2011 at 8:12 AM, Geoff Wolf AB3LS <[email protected]>wrote: > I haven't had a chance to try to run the rig off a battery. > > However, I was able to record the sound using my iPhone. > > I have uploaded the audio file here: > http://alien.liltechdude.com/files/Recordings/kpasqueal.mp3 > > I made sure the fan power cables weren't touching the fans/each other. > > AB3LS > > > > > On Mon, Jun 27, 2011 at 10:14 PM, Guy Olinger K2AV > <[email protected]>wrote: > >> If you can do it, see if you still have the noise running off a >> battery. 73, Guy. >> >> On Mon, Jun 27, 2011 at 8:37 PM, Adi Andrei <[email protected]> >> wrote: >> > 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 >> > > ______________________________________________________________ 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
