Lyle is on vacation and didn't get that memo. He's above and beyond the call of duty posting at all :)
Also note that the latest production KX3 RF board (rev. E) has the synth circuitry a lot farther from the PA and driver. This significantly reduced the thermal gradient. (The other major Rev. E RF board improvement was tighter 17/15/12/10 meter band-pass filters. These were inherited by the KX2 as well.) Wayne N6KR On May 29, 2016, at 8:50 PM, D Howard <va...@me.com> wrote: > Lyle > Such data would be very beneficial. > And result in more KX2 sales - ha if that could be handled!! > Note that Wayne just posted that a temp comp procedure will be posted. > Dan VA3MA > >> On May 29, 2016, at 11:45 PM, Lyle <kk7p4...@gmail.com> wrote: >> >> The local oscillator design of the KX2 is very different from the KX3, as >> are the thermal isolation of the oscillator from the PA and the high current >> paths in the radio. There is as yet no field temperature compensation >> procedure available for the KX2 nor is it clear that one is needed. At >> least one KX2 field tester operated JT65 successfully with the KX2. >> >> There are enough KX2 radios in the field now that it should be a simple >> matter for an owner to measure the stability of the radio in this mode and >> report the results to the group to satisfy the curious... >> >> 73, >> >> Lyle KK7P (on "vacation") >> >> Sent from my iPhone >> >>> On May 29, 2016, at 8:14 PM, Dan - VA3MA <va...@me.com> wrote: >>> >>> Luke >>> Thanks - just what I needed to know! >>> Have you tried JT9 ? >>> Perhaps some sort of heatsink/handles added to the case might help?? >>> 73 >>> Dan VA3MA >>> >>> >>> On 2016-05-29, at 22:37, Luke <auric...@yahoo.com> wrote: >>> >>> Hmm, not sure why it cut out my message. Here's what I wrote: >>> >>> I've used my KX2 on WSPR and JT65 and it appears to be plenty stable. I >>> used to have a KX3 and sold it because it wouldn't decode WSPR between >>> transmit cycles due to excessive drift. I've kept the KX2 to <5 watts >>> because the right sideplate gets very hot with the high duty cycle. >>> >>> I've actually just been sitting here running JT65 @ 10 watts when I got >>> your email, and it is doing pretty well. I had 3 back to back QSO's and on >>> the last transmission the PA Temp got up to 47C (~117F) which doesn't seem >>> too bad. As it cools off there is no drifting or slanting of signals on the >>> waterfall either. I think the 1 minute on/off duty cycle of JT65 is very >>> doable with the KX2, and WSPR might be pushing it. The other night the >>> sideplate got quite hot running WSPR at 5 watts. >>> >>> Luke >>> AD0KI >>> >>> >>> From: Dan - VA3MA <va...@me.com> >>> To: Luke <auric...@yahoo.com> >>> Sent: Sunday, May 29, 2016 8:12 PM >>> Subject: Re: [Elecraft] KX2 on JT65 & JT9 ?? >>> >>> Luke >>> No content???? >>> >>>> On May 29, 2016, at 8:51 PM, Luke via Elecraft <elecraft@mailman.qth.net> >>>> wrote: >>>> >>>> >>>> ______________________________________________________________ >>>> 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 va...@me.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 kk7p4...@gmail.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 n...@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
