Would second all of this fine advice. I run the KX3 + PX3 + KAT100 into an Ameritron ALS-600S. And those clamp on chokes are essential. Using them liberally, and also making sure all the control mini-cables come no where close to the high-power coax outputs or the output from the KX3. Tidy things up nicely. Keeps the RF going where it should go.
David A., KC0XT > On Jan 31, 2015, at 10:59 AM, Jim GM <[email protected]> wrote: > > Durring the last month of the ARRL Centennial QSO Party I was behind on > points to get into the top tire. So I finally turned on the amp and started > calling CQ on 20 -10 Meters. I noticed the the amp was getting hot and > finally tripped out on high heat. cooling fan helped but not as well as I > hoped. > > I also noticed that the amp ATU would start to re tune on my transmit > frequency more than I would like. I finally tracked down the issue and came > up with a solution. > > RF was coming back on the RF output cable between the KX3 and KXPA100. Some > RF was also coming back on the other cables as well. > > I installed some of those DX Engineering clamp on choke cores. I bundled > the inter-connecting cables and put 3 of those cores around those cables. I > separated the RF output cable from the bundle, and took one clamp on core > and wrapped one turn close to the amp. Took care of my problem and the amp > ran as cold as a cumber in the frig. > > COMMON MODE CHOKE POWER !!! :-) > > -- > Jim K9TF > ______________________________________________________________ > 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 > Message delivered to [email protected] David Ahrendts [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 Message delivered to [email protected]
