Doing the switching outside the amplifier box may be an easier and more economical way to achieve that isolation. There may be further economy as well as simplification to be had if this switching hardware is combined as a single product with the antenna selection switch (2 antennas out of 6 etc). While some may be happy running without tuner, many would want duplicated tuners external to the shared amplifier. Incorporating separate tuners would not impose additional RF switching requirements, but possibly some additional considerations relating to the control scheme. Of course, the user would want to be able to purchase the amp without built-in tuner.
73. Erik K7TV -----Original Message----- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Igor Sokolov Sent: Thursday, April 27, 2017 5:00 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500 Enhancement May I mention that for SO2R in the same box the isolation should be in order of 80db for 1500 w power level. This is not that easy to obtain. 73, Igor UA9CDC 27.04.2017 7:59, Erik Basilier пишет: > Of course, in an SO2R scenario where the shared amplifier alternates > between two different bands with every transmission, a shared ATU > would exercise the relays a lot. Separate tuners might be needed in > order to avoid the relays wearing out. > > 73, > Erik K7TV > > -----Original Message----- > From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of > Matthew Cook > Sent: Wednesday, April 26, 2017 5:45 PM > To: Thomas Donohue <tomdo...@gmail.com> > Cc: Elecraft Reflector <Elecraft@mailman.qth.net> > Subject: Re: [Elecraft] KPA1500 Enhancement > > If that were to happen then adding a second 15-way connector at the > same time to said module to allow two K3/K3s to drive the one amp > through each respective antenna input and matched output would start > this amp towards the "basic" SO2R path. From there a smart 2x6 > antenna switching unit some well designed BPF filters and your well on > your way. The rest of the magic is then just firmware (says he that > writes said firmware every day) within the upgraded processor the KPA1500 has > been blessed with. > > I'm fingers crossed.. > > 73 > > Matthew > VK5ZM > > On 26 April 2017 at 22:37, Thomas Donohue <tomdo...@gmail.com> wrote: > >> Hi to all: >> >> Wayne or Eric. Are there any plans or thoughts about adding a second >> RF input to the amp, similar to what the Yaesu VL-1000 has? >> >> Best 73, >> Tom/W1QU >> >> >> Sent from my iPad >> ______________________________________________________________ >> 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 >> vk...@bistre.net >> > ______________________________________________________________ > 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 > ebasil...@cox.net > > ______________________________________________________________ > 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 > ua9...@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 ebasil...@cox.net ______________________________________________________________ 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
