The cable between the IC-7610 and the KAT500 does two things. First, it supplies power to the KAT500 so it turns on when the IC-7610 is powered up. Second, it allows the TUNER button on the IC-7610 to cause the '7610 to switch to CW mode and transmit an approximate 10W signal. That, in turn, causes the KAT500 to attempt to find a matching solution to the selected antenna. You shouldn't need one of those "tuner plugs" as that function is built into the KAT500 when connected by the AH-4 Molex cable wiring. The above assumes that you have the KAT500 connected to the IC-7610 ANT1 antenna port.
If your KAT500 is not working that way with the IC-7610 TUNER button then I would recheck the cable wiring and verify that the KAT500 is connected to ANT1 on the IC-7610. If those are good it is possible there is a problem with the KAT500. Good luck! Ken WA2LBI On Mon, Apr 19, 2021 at 3:06 PM Buck <[email protected]> wrote: > Auto-sense works. I just don't understand why Icom/Elecraft would even > suggest hooking up the molex connector to the KAT500 if it doesn't do > anything. It is a waste of time. > > I got the W2GNY plug to fool the 7610 into transmitting as 10 signal and > it works. I guess I will stick with that. > > Buck, k4ia > Honor Roll > 8BDXCC > EasyWayHamBooks.com > > On 4/19/2021 2:31 PM, Ken Winterling wrote: > > Buck, > > > > I have had the IC-7610 and KAT500/KPA500 for almost three years and they > > are a very nice pair (or trio..). The IC-7610 doesn't "control" the > > KAT500 per se. Changing bands/frequencies on the IC-7610 doesn't cause > > any response from the KAT500. Only when the IC-7610 transmits does the > > tuner detect (sense) the RF and then adjust the capacitors and inductors > > to match to the current antenna. An Elecraft transceiver, OTOH, does > > communicate with the KAT500 (and KPA500) and changes > > bands/frequencies/antenna ports as the bands and frequencies are changed. > > > > The KPA500 responds the same way and changes bands by sensing transmit > > RF. You can build a "band data" cable to interface the IC-7620 to the > > KP500 and it will, with restrictions, follow the band selected by the > > IC-7610. The restriction is that Icom's band data voltages do not > > support the WARC bands. As a result, both 24 mHz and 28 mHz select > > 28mHz; both 18 mHz and 21 mHz select 21mHz. So, for all bands except > > WARC, the KPA500 will follow band selections made on the IC-7610 (or > > almost any other Icom such as the IC-7300, etc.). > > > > I can send you a diagram of the band data cable if you would like. It is > > only marginally useful and most ops of non Elecraft gear seem to just > > let the KPA500 (and KAT500) RF sense the transmitted RF to make > > necessary selections. Be sure to read the KAT500 manual section > > regarding "training" your tuner. > > > > GL! > > > > Ken > > WA2LBI > > > > > > > > > > On Mon, Apr 19, 2021 at 2:05 PM Buck <[email protected] > > <mailto:[email protected]>> wrote: > > > > I made up the cable from the Molex to the TUNE on the KAT500 as > > described and have checked continuity from end to end. All OK. > > > > I have the SEND from the 7610 connected to the PTT RLY on the KAT500. > > > > When I change bands, nothing happens. Is there another setting I > need > > to change in the 7610? > > > > Buck, k4ia > > Honor Roll > > 8BDXCC > > EasyWayHamBooks.com > > > > On 4/19/2021 10:35 AM, Lyn Norstad wrote: > > > Buck - > > > > > > The KAT500 Rev D1 Manual, pages 13, 14 and 15 cover the Icom > > connections. > > > > > > The "AH4" cable (the one you're describing) powers the KAT500 and > > controls > > > the "Tune" function. If yours isn't doing anything, the cable is > > probably > > > defective. > > > > > > What else do you have connected? > > > > > > 73 > > > Lyn, W0LEN > > > > > > > > > -----Original Message----- > > > From: [email protected] > > <mailto:[email protected]> > > > [mailto:[email protected] > > <mailto:[email protected]>] On Behalf Of Buck > > > Sent: Monday, April 19, 2021 7:42 AM > > > To: [email protected] <mailto:[email protected]> > > > Subject: [Elecraft] Controlling KAT500/KPA500 with Icom 7610 > > > > > > Anyone who has succeeded, I could use some help. The connection > from > > > the 7610 molex antenna tuner jack to the "Icom in" jack on the > > KSAT500 > > > doesn't do anything. > > > > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > <http://mailman.qth.net/mailman/listinfo/elecraft> > > Help: http://mailman.qth.net/mmfaq.htm > > <http://mailman.qth.net/mmfaq.htm> > > Post: mailto:[email protected] <mailto: > [email protected]> > > > > This list hosted by: http://www.qsl.net <http://www.qsl.net> > > Please help support this email list: http://www.qsl.net/donate.html > > <http://www.qsl.net/donate.html> > > Message delivered to [email protected] <mailto:[email protected]> > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
