Re: [Elecraft] KX3 with KPA100/KAT100
Ed and all, It is more complicated than "build an interface". The KPA100 and KAT100 depend on internal signals in the K2 for proper operation. The first is '12CTRL' which is used to tell the KPA100 that the K2 has 12 volts present. Second is '8R' which tells the KPA100 that the K2 has been put into transmit. I will admit that those 2 above could be 'dummied up' by a 12 volt "ON" switch and 'PTT'. But there are other critical signals that are not possible except with the K2 base. The first of those is the 'AUXBUS' which is necessary for the KPA100 and KAT100 firmware to operate. This 'one wire' signal is the main signal to communicate among the various firmware processors in the K2 system. It includes band data as well as PA temperature, fan state, current indication, fan speed control, control of the KPA100 T/R state, TUNE power and KAT100 tuning control, detection of actual power output over the VRFDET line so the K2 firmware can control the power output. It is also necessary to calculate the SWR as well as measuring the actual power output and feeding that information to the base K2 firmware for drive power control. Those latter signal lines would be quite impossible to drag out of a KX3, yet they are essential to the proper operation of the KPA100/KAT100. If one were to redesign the hardware and firmware of the KPA100 and KAT100, it may be possible to run them as a standalone amplifier and tuner, but given the magnitude of the task, selling the KPA100/KAT100 and using the money to buy a KXPA100 and KXAT100 would be the best way to make a 100 watt system for the KX3. 73, Don W3FPR On 1/25/2020 2:41 PM, Edward R Cole wrote: At first I read KXPA100, not KPA100. Of course the KXPA100 was designed to be a companion to the KX3. I have one and drive it with either my KX3 or K3/10 (10w version of the K3). I suppose one could build an interface from KX3 to KPA100. Basic need would be PTT, RF drive, and Band switching. __ 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] KX3 with KPA100/KAT100
At first I read KXPA100, not KPA100. Of course the KXPA100 was designed to be a companion to the KX3. I have one and drive it with either my KX3 or K3/10 (10w version of the K3). I suppose one could build an interface from KX3 to KPA100. Basic need would be PTT, RF drive, and Band switching. Years ago, I bought the 100w PA module for a HF mobile with thoughts to make a "cheap 100w amp". Never got around to it. I did build some CCI HF kits (300w and 140w) but finally decided on the KXPA100/KXTA100 combo. http://www.kl7uw.com/fs.htm KX3+KXPA100 works nice in my mobile on HF/6m. http://www.kl7uw.com/Mobile.htm 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: dubus...@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] KX3 with KPA100/KAT100
Kev, Sorry, but that will not work. The KPA100/KAT100 needs internal signals from the K2. Those signals are not available from the KX3. 73, Don W3FPR On 1/23/2020 11:20 PM, Kev Schache wrote: I'm confined to operating from home due to age restraints but I'm also the very proud builder/owner of a K2 and a separate EC2 cased KPA100 and KAT100 - along the lines of W3DVX 'twins'. In addition to that combo, I'm also the proud owner of a KX3 which seems to be developing a yearning for 100W. I'm wondering if anyone has successfully used the KPA100/KAT100 with the KX3 ? Is that practical or is that simply not feasible ?? __ 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] KX3 with KPA100/KAT100
I'm confined to operating from home due to age restraints but I'm also the very proud builder/owner of a K2 and a separate EC2 cased KPA100 and KAT100 - along the lines of W3DVX 'twins'. In addition to that combo, I'm also the proud owner of a KX3 which seems to be developing a yearning for 100W. I'm wondering if anyone has successfully used the KPA100/KAT100 with the KX3 ? Is that practical or is that simply not feasible ?? Any comments or thoughts would be appreciated. Thanks and 73, Kev VK5KS ex vk3zka __ 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] KX3 and KPA100/KAT100
I have built the KPA100/KAT100 in a separate enclosure for my K2 and would like to know if anyone has experience of using these two kits with a KX3? 73, Larry - G0IKE __ 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
Re: [Elecraft] KX3 and KPA100/KAT100
I think that would be problematic as the KPA100/KAT100 depends on the MCU/firmware in the K2 to control it. 73, Matt VK2RQ On 04/09/2013, at 3:15 AM, Larry Dodson larry...@googlemail.com wrote: I have built the KPA100/KAT100 in a separate enclosure for my K2 and would like to know if anyone has experience of using these two kits with a KX3? 73, Larry - G0IKE __ 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 __ 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
Re: [Elecraft] KX3 and KPA100/KAT100
Larry, Sorry, but the KPA100 and KAT100 both depend on internal K2 signals for control - T-R switching, band selection, etc. That makes the KPA100 an amplifier dedicated to the K2, and the KAT100 autotuner is also dedicated to the K2. 73, Don W3FPR On 9/3/2013 1:15 PM, Larry Dodson wrote: I have built the KPA100/KAT100 in a separate enclosure for my K2 and would like to know if anyone has experience of using these two kits with a KX3? 73, Larry - G0IKE __ 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
