Sri, I meant the temp was 55C, not 45C after the automatic power reduction kicked in.
73 Ron AC7AC -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron D'Eau Claire Sent: Sunday, June 18, 2017 4:28 PM To: 'Irma & Linas(LY2H)'; elecraft@mailman.qth.net Subject: Re: [Elecraft] KX2 heatsink Fired up my "stock from the factory" KX2 into a dummy load at 10 watts, key down, and it dropped to 5 watts after 4 minutes running from a 13.8 vdc supply. PA temp was about 45C. Hope that helps with your analysis. 73, Ron AC7AC -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Irma & Linas(LY2H) Sent: Sunday, June 18, 2017 2:33 PM To: elecraft@mailman.qth.net Subject: [Elecraft] KX2 heatsink Hello folks, I am looking for the practical , empyrical, real info based on the individual measurements of the maximum Key-down time/temperature at the 10w output of the KX2 before it drops down to 5 W issuing a message of "HI TEMP". I would also like to learn about comparison of the KX2 stock heatsink vs the Pro-audio Engineering KX22 product. The reason is that I have decided to install the KX22 on my KX2 ( # 148*) after a short dx-pedition to Aland islands in May. I was handling quite a pile-up from the hotel room and after some 5 min of intensive CQ-ing and answering on CW the PA temperature gone up to 59-60C degrees and the power dropped down to 5 W and it was frustrating :) Today I have installed the PAE KX22 heatsink. The key-down at 10 W into a dummy load in CW mode lasted for around 3 minutes starting from the ambient temp. 27C. I don't think this is very impressive baring in mind the Pro-audio's claim of the 250% key-down time improvement. Unfortunately, I was not so smart to test the key-down time with the stock heatsink before I changed it to the new one, :) But I remember Wayne was posting here in the previous thread something abt 7 min of key-down at 10W... So, with the 250% improvement with the KX22 it should last... for some 24 min?! in my case, It doesn't sound very realistic , neither 7 min with the stock heatsink, nor 24 min with the Pro-Audio ( maybe ,bad thermal contact, not enough of grease?). That's why it would be very interesting to compare the real-life empyrical data of the other KX2 owners. 73! Linas LY2H ______________________________________________________________ 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 r...@elecraft.com ______________________________________________________________ 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 r...@elecraft.com ______________________________________________________________ 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
