> Then at some point, you just need a K3S. Not quite: you would also need a new KPAIO3A interface board - and even then, it would only be a partial upgrade.
My very early K3S/10 was probably the first to undergo a comprehensive 'module migration' in the wild (5000 miles away from the factory). Elecraft's support was exemplary - as ever - but we discovered that the older KPAIO3 does not function correctly with the K3S mainboard. It does not correctly control the relays and the fans, so it fails the PAIO TST procedures. When the KPAIO3 is replaced by a KPAIO3A, then the KPA3 does become compatible with the K3S and will function much the same as it did in the K3. But migrating a KPA3 into a K3S can only ever be an *incomplete* upgrade. As Joe has already pointed out, it does not include many of the other improvements that Elecraft made in this area of the K3S - not only the increased number of power pins but also the KPA3A itself, which is a completely new design using power MOSFETs. So even though it is possible to migrate a KPA3 into a K3S, the result can never be a true K3S/100. Therefore it isn't surprising that Elecraft does not recommend this procedure, and does not offer it as part of the factory migration service. 73 from Ian GM3SEK >From: elecraft-boun...@mailman.qth.net [mailto:elecraft- >boun...@mailman.qth.net] On Behalf Of hawley, charles j jr >Sent: 31 March 2018 21:22 >To: Joe Subich, W4TV >Cc: elecraft@mailman.qth.net >Subject: Re: [Elecraft] Migrating a KPA3 POWER module to a K3S > >Thanks. Then at some point, you just need a K3S. > >Chuck Jack >KE9UW > >Sent from my iPhone, cjack > >> On Mar 31, 2018, at 9:00 AM, Joe Subich, W4TV <li...@subich.com> >wrote: >> >> >> >> >> >>> On 3/31/2018 9:45 AM, ke9uw wrote: >>> In that the KPA3A has more pins carrying power, would an older K3 >benefit >>> from a KPA3A? >> >> No. >> >>> Are the pins already there and useable in the old K3? >> >> No. The connectors are longer in the K3S. P67B/J67B are 30 pins in >the >> K3S (KPAIO3A) vs 24 pins in the K3 (KPAIO3) and P68B/J68B are 24 >pins >> in the K3S (KPAIO3A) vs. 20 pins in the K3 (KPAIO3). >> >> >> 73, >> >> ... Joe, W4TV >> >> >> >__________________________________________________________ >____ >> 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 c-haw...@illinois.edu >__________________________________________________________ >____ >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 gm3...@ifwtech.co.uk ______________________________________________________________ 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
