Re: [Elecraft] K3 & KX3 with KPA500/KAT500
I use this four position AV switch to select the keying line. Since it can switch three connections (L/R audio, video) you can get creative. Although I don't use ALC it could also be switched along with the keying line. https://smile.amazon.com/gp/product/B00KXVBB3Q/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8=1 Ken WA2LBI On Fri, Jul 30, 2021 at 3:37 PM Jim Brown wrote: > On 7/30/2021 9:43 AM, Phil Hystad via Elecraft wrote: > > Can this be done and if so has this been written up or documented > someplace? > > The KAT500, KPA500, and KPA1500 have excellent frequency sensing, so > nothing more than a SPDT coax switch is required. I suspect that the key > lines from the KX3 and K3 can be paralleled. For many years, I've run > the Key inputs of a KPA500 (and now KPA1500) wired in parallel. > > In my station, a K3 is switched between an 87A and a KPA1500. I'm doing > it with a pair of Tohtsu SPDT coax relays on input and output. Before > the KPA1500, the KPA500 gave me 500W on 6M, while the 87A was the HF > contesting amp. Now the 87A is standby. > > 73, Jim K9YC > > > __ > 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 wa2...@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 arch...@mail-archive.com
Re: [Elecraft] K3 & KX3 with KPA500/KAT500
On 7/30/2021 9:43 AM, Phil Hystad via Elecraft wrote: Can this be done and if so has this been written up or documented someplace? The KAT500, KPA500, and KPA1500 have excellent frequency sensing, so nothing more than a SPDT coax switch is required. I suspect that the key lines from the KX3 and K3 can be paralleled. For many years, I've run the Key inputs of a KPA500 (and now KPA1500) wired in parallel. In my station, a K3 is switched between an 87A and a KPA1500. I'm doing it with a pair of Tohtsu SPDT coax relays on input and output. Before the KPA1500, the KPA500 gave me 500W on 6M, while the 87A was the HF contesting amp. Now the 87A is standby. 73, Jim K9YC __ 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
[Elecraft] K3 & KX3 with KPA500/KAT500
I currently run a full K-line (K3/P3 -> KPA500 -> KAT500) and I have a KX3/PX3 with KXPA100 as my backup and portable radio. When I first got my KX3 I wanted to use it with the KPA500 but at the time, as far as I remember, it was not possible without some fiddling of cables (physical switching) or operating one of the radios with less then full functionality on the interface. Is this still true? Ideally I would want to cable up the two radios to operate with full Elecraft intended functionality without having the need to unplug/plug cables or switch cables. Today I see commercial dual RF input amplifiers that enable this sort of operation. It is also possible with a number of third party linear amplifiers but this means dropping some of the nice features that Elecraft has enabled for automatic band selection, VOX, and other operations. Operating with one of the radios fully in off position is fine with me in such a dual configuration. Can this be done and if so has this been written up or documented someplace? 73, phil, K7PEH __ 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
