Re: [Elecraft] KPA-500 HUM from PA and not from Speaker !!!
The hum seems to be the 50 Hertz power supplies? -- View this message in context: http://elecraft.365791.n2.nabble.com/KPA-500-HUM-from-PA-and-not-from-Speaker-tp6647675p6652787.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-500 HUM from PA and not from Speaker !!!
I have experienced absolutely no hum, either mechanical or electrical, associated with my KPA500 in either of my two ham shacks. /Rick N6XI On Tue, Aug 2, 2011 at 11:08 PM, Klaus Koppendorfer k...@ccf.net wrote: discussion is drifting away to amplified speakers but there is realy a problem with HUM comming from KPA500 1) HUM during transmit 2) HUM somes sometimes when the KPA500 is off, but on line and backswitch on -- Rick Tavan N6XI Truckee, CA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-500 HUM from PA and not from Speaker !!!
Klaus, I know you've already contacted Elecraft Support about this. Right? If you have not, you will have a good deal more success contacting them, since they have probably already seen this before and know what to look for. 73, Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member On Wed, 3 Aug 2011 06:08:42 +, Klaus Koppendorfer k...@ccf.net wrote: discussion is drifting away to amplified speakers but there is realy a problem with HUM comming from KPA500 1) HUM during transmit 2) HUM somes sometimes when the KPA500 is off, but on line and backswitch on [snip] __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-500 HUM from PA and not from Speaker !!!
Bob, our KPA500 engineering project manager, will be contacting Klaus. 73, Eric WA6HHQ --- www.elecraft.com On 8/3/2011 1:37 PM, n...@n5ge.com wrote: Klaus, I know you've already contacted Elecraft Support about this. Right? If you have not, you will have a good deal more success contacting them, since they have probably already seen this before and know what to look for. 73, Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member On Wed, 3 Aug 2011 06:08:42 +, Klaus Koppendorferk...@ccf.net wrote: discussion is drifting away to amplified speakers but there is realy a problem with HUM comming from KPA500 1) HUM during transmit 2) HUM somes sometimes when the KPA500 is off, but on line and backswitch on __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-500 HUM from PA and not from Speaker !!!
On 8/3/2011 9:40 AM, Rick Tavan N6XI wrote: I have experienced absolutely no hum, either mechanical or electrical, associated with my KPA500 in either of my two ham shacks. /Rick N6XI Nor have I in my one ham shack. In fact, the only time I've heard the fans come on is when I shut the amp off at the front panel *and* have my hearing aids back in. YMMV, but my K3 and KPA500 appear to be silent devices. 73, Fred K6DGW - Northern California Contest Club - CU in the 2011 Cal QSO Party 1-2 Oct 2011 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA-500 HUM from PA and not from Speaker !!!
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