The input circuit is bypassed by the relay so the only thing in the path is the relay, coax connectors and the wires. I think it is the wires. I have no such difficulty on 10 meters. My amp is the Dentron Clipperton L with the AD5X QSK mod. The connecting wires are about 2.5 inches long. The QSK mod works great on low bands when the amp is on. The relay noise is less than the fan noise and it has survived several thousand QSOs with no problem other than 6 meters. The Dentron is the predecessor to the AL572 with the same tube lineup and a bit more compact layout. Willis 'Cookie' Cooke K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart
________________________________ From: K4ia <[email protected]> To: WILLIS COOKE <[email protected]> Cc: Elecraft Reflector <[email protected]> Sent: Sun, July 17, 2011 10:35:19 AM Subject: Re: [Elecraft] low power on 6 meters I notice high swr when my AL572 is in the antenna circuit - even when turned off. When I hook the coax directly to the K3, the swr is 1:1. Haven't figured out why except maybe there is a low pass filter built in the amp that is in line all the time. Craig Buck On Jul 17, 2011, at 11:07 AM, WILLIS COOKE <[email protected]> wrote: > Bob, do you have an amplifier in line on 6 meters? I have noticed that my > Clipperton L absorbs about 15 watts on 6 meters even when it it turned off. > It > > does not do this on the lower bands. You can easily find out by taking the > connectors loose on the amp and replacing with a short barrel connector. May > not be your problem, but it is mine. > Willis 'Cookie' Cooke > K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart > > > > > ________________________________ > From: Robert Garceau <[email protected]> > To: Elecraft <[email protected]> > Sent: Sun, July 17, 2011 6:11:59 AM > Subject: [Elecraft] low power on 6 meters > > I have seen this issue posted before, but no answers that I can see. > > > > I have a K3 and the output is no more than 52 watts with an swr of > 1.23..sometime get it up to 62. > > > > Now I have the KPA500 and using 40 watts to exite the amp, I get just a tad > over 425 watts. > > > > Don't think I want to push it over 40 watts. And to be honest there probably > isn't much difference between 425 and 500, but would like to know why I > can't get the 100 like I should.. > > > > Bob, W1EQ > > > > ______________________________________________________________ > 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
