The KAT500 will only initiate a tune based on SWR being above a threshold when it is in auto mode. Its manual mode requires a press of the tune button on the ATU first, followed by RF from the K3, for it to tune.
73, Eric www.elecraft.com _..._ On Dec 8, 2012, at 6:32 PM, iain macdonnell - N6ML <[email protected]> wrote: > On Sat, Dec 8, 2012 at 6:07 PM, John Reilly <[email protected]> wrote: >> I don't think I understand how the tuning works with the KAT500. I have a >> K3, KPA500, and the two 15-pin cables (K3 to KAT, and KAT to KPA). >> >> I set my K3 Tune Power to 25w. I thought when I press tune on the K3, the >> KAT500 should tune, and it shouldn't key the Amp; however, when I do this, I >> continue to get around 500w from the Amp. >> >> Could someone please explain how this is supposed to work? > > When you invoke the K3's TUNE function (hold the XMIT button), the K3 > will make a 25W key-down signal. Nothing more fancy than that happens > at the K3. > > If the KAT500 detects VSWR higher than the configured auto-tune > threshold, it will inhibit keying to the amp, and attempt to tune > (from memory first, then a full search if no suitable memory is > available). If the KAT500 does not detect VSWR higher than the > threshold, it will not inhibit keying, nor attempt any tune function. > > Are you seeing high VSWR when you invoke the K3's TUNE function? > > 73, > ~iain / N6ML ______________________________________________________________ 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
