You may want to also look at the SGC Tuners. Far superior to the Icom. You can just send it an low power AM signal and it will tune.
I have used them in cars and many temporary installations and they 'just work'. http://www.sgcworld.com/ Mike On Sat, Apr 8, 2017 at 8:36 PM, Jim Allen <[email protected]> wrote: > > I am looking at remote antenna tuners. I have seen several controllers > for the ICOM AH-4 tuner. My questions are about operation with a K3s. > > 1. Is there a limit to the time that 10w of RF can be sent to the > AH-4 via the K3s Tune button? > > 2. All circuits specify a momentary switch, but does momentary mean > 0.1sec, 1.0sec or 5seconds? Does the time matter? > > 3. When the complete signal returns from the AH-4 should the Tune RF > or the momentary be terminated immediately? > > 4. Is there a combination of momentary or Tune RF that will damage > the AH-4? > > I have an AH-4 which worked with a home built controller for some > months, and then became operationally intermittent and final fails to work > at all. That makes me gun-shy, about buying another even though the AH-4 > gets excellent reviews on eHam, almost all of which are based on an ICOM > rig control. > I have used an AH-4 for many years, with a 706MKIIG and with various other > manufacturer's radios, including now a K2. Other than the limitation to > ~125 watts, these are excellent. I only run 5 watts so it is not an > issue. I do not recall a situation where the AH-4 would not give a useable > match, provided I provided it a plausible antenna. I use a separate > SWR/watt meter that shows it working. > > The momentary switch is push on, release off, no time specified. Pushing > the button signals the AH-4 to run through its paces for a match. Most > often, it is very quick. Occasionally, when you have gone from, say, 15M > to 80M, it might take a little longer, but never more than several > seconds. If no match can be found, it just stops. Either way, you stop > the power. I wouldn't let it just run like that, but have never heard of > damage because of it. You need to reduce power with non-Icom rigs that > don't do it automatically. > > You might join the Icom tuner Yahoo group, if you can stand Yahoo. Lots > of user experience there. > > I've never seen a store bought controller for the AH-4. Where have you > seen them? > 73 Jim Allen W6OGC > > Sent from my iPad > ______________________________________________________________ > 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] > ______________________________________________________________ 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]
