Monday (Labor Day) I setup my buddipole in the backyard as a 20 meter vertical and operated portable for about 3 hours sitting in the shade and enjoying the 96 degree F temperature in the shade and the high humidity. I ran both SSB and data (PSK31) during the time I was outside. With the temperature in the shade at 96 degrees, running 10 watts on 20 meters I made a lot of contacts. At no time did the radio overheat, or have any performance issues with the KB8UHN hat sink installed. I was quite happy with the operation and plan to repeat the setup on the coast once the temperatures drop. I am quite confident that the KB8UHN heat sink will serve my needs.
I have tested it running JT-65 at 10 watts and may do the mode, but it is not very exciting. 73 Randy Moore AI4CO -----Original Message----- From: Gary W. Hvizdak [mailto:gary.hviz...@cfl.rr.com] Sent: Monday, September 01, 2014 3:54 PM To: 'Randy Moore' Subject: RE: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks) P.S. I deleted several comments from my Reflector post before sending it (for the sake of brevity), including ... 1) Mentioning that the KB8UHN heatsink might have performed slightly better (versus the factory heatsink) had the tests been run at higher power. (Essentially higher power would have magnified the difference between each candidate.) Adrian probably chose those power levels so he wouldn't over-stress his radio. 2) Pointing out that the PAs got hotter running 0.5 Watts on 6 meters, than they did running 5.0 Watts on 20 meters! 3) Mentioning that a lower ambient temperature might have magnified the difference between the heatsinks. Reference http://www.ve7fmn.ca/this-is-cool/pdfs/performance_page/theoretical_performa nce_c.pdf -----Original Message----- From: Randy Moore [mailto:ai...@outlook.com] Sent: Monday 01 Sep 2014 1229 To: 'Gary W. Hvizdak'; elecraft@mailman.qth.net Cc: 'Adrian Ryan'; 'Fred'; 'Edouard Lafargue'; matt421...@gmail.com Subject: RE: [Elecraft] [KX3] A Comparative Performance Assessment (of Aftermarket KX3 Heatsinks) Thank you very much for the comparison of the available heat sinks for the KX3. I bought the KB8UHN heat sink and I am quite happy with it. Using his heat sink I am able to run Digital modes at 10 watts on 20 and 40 meters with no problems and my radio temperature is lower than the comparison at 5 watts. I did use the included heat sink compound so perhaps that makes a difference. I did some testing on my own using assorted heat sinks from old audio and video cards and found that almost any heat sink will make a big difference. Thank you for supporting the Elecraft KX3 with your aftermarket accessories. Randy Moore AI4CO <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 Message delivered to arch...@mail-archive.com
