OOPS ... K3 SN is 3786 ... senior moment! Mike N9QR
From: [email protected] Date sent: Tue, 19 Jan 2010 15:59:45 EST To: [email protected] Subject: [Elecraft] K3 and Alpha 91b > I have an Alpha 91b hooked to the K3 (SN 8376) and I'm having an > "Odd" > problem ... on 75/80 meter SSB, if I run the amp at 45 watts, which > is what > works on CW without issue, I encounter significant nuisance tripping > of the > Amplifier to the fault condition. The amp also exhibits a power > spike into > the 2KW range often times when it faults. If I reduce the power to > 30 > watts on the K3, the amp runs 1500 watts OK without tripping. > Please .... > resist the temptation to say "Run at 30 watts then". All other > bands ... > except 6 meters which I didn't check, do not exhibit this issue. > Power out from > the K3 is 45 watts and the amp runs 1500 watts out with NO > nuisance > tripping. I've talked to the tech's at Alpha and at least one > other K3 owner > has had this same problem. He asked me to check the amp with > another radio > so, using my spare radio, Yaesu FT-450, to drive the amp I have no > nuisance > tripping on any band while running 45-50 watts into the amp. > Neither radio > has ALC hooked up, only the TR relay. Both radios and amp are > grounded to > the same ground buss. RF calibration was done when the radio was > assembled and I have not re-done that process. > > Any ideas as to why the radio would exhibit a tendency to over drive > the > amp just on 75/80 meters? > > Mike N9QR > ______________________________________________________________ > 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
