My bet is on a fried PIN diode (I think the T/R system gets bypassed when you switch to standby mode). Best to contact support....
73, ~iain / N6ML On Sun, Feb 10, 2013 at 12:01 PM, <jpescat...@aol.com> wrote: > > Disconnected PTT line from KPA500, still 15 db attenuation on RX. > > > -----Original Message----- > From: Dick Dievendorff <die...@comcast.net> > To: mcduffie <mcduf...@garymcduffie.com>; 'John K3TN' <jpescat...@aol.com> > Cc: 'elecraft' <elecraft@mailman.qth.net> > Sent: Sun, Feb 10, 2013 5:58 am > Subject: RE: [Elecraft] KPA500 - Rx Attenuation > > > Make sure that the amp's PTT line is not pulled low when you expect to be > receiving. > > 73 de Dick, K6KR > > > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of AG0N-3055 > Sent: Saturday, February 09, 2013 8:24 PM > To: John K3TN > Cc: elecraft > Subject: Re: [Elecraft] KPA500 - Rx Attenuation > > On Sat, 9 Feb 2013 19:51:09 -0800 (PST), John K3TN wrote: > >> I thought 40M signals sounded kinda low, and the noise floor on the P3 >> was down - but then noticed when I turned the KP!500 from OPER to >> STBY, signals came about 15db. No fault indicated. TX power seems fine. > Any thoughts? > > I'm currently investigating a similar problem. To speak to your issue, I > have not seen it at all. However, there is something similar happening on > the frequencies below 160M. > > Gary > -- > Web: http://ag0n.net > NodeOp Page: http://ag0n.net/irlp > Node 3055: http://ag0n.net/irlp/3055 > > ______________________________________________________________ > 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 > > > > ______________________________________________________________ > 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 ______________________________________________________________ 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