Need to have recent firmware in both the KAT500 and KPA500 also. The KPA500 for this was updated shortly after the KAT500 was created. In any case, the latest firmware for both devices is strongly recommended.
73! Jack, W6FB > On Nov 29, 2018, at 6:48 PM, Don Wilhelm <donw...@embarqmail.com> wrote: > > Randy, > > That indicates that you do not have your KAT500 and amplifier properly > connected. > > The KEYOUT line from the transceiver should go first to the KAT500, and then > from the KAT500 to the amplifier. > When the KAT500 needs to tune, the amplifier will not be keyed and tuning > will take place at the power output of the transceiver. > After tuning, the amplifier will be engaged. > > 73, > Don W3FPR > > On 11/29/2018 7:42 PM, Randy Farmer wrote: >> I've had difficulties with my KAT500 / KPA500 combo (only) on 160 meters, >> apparently due to the tuner relying on RF sensing. I've carefully "trained" >> my KAT500 all across the 160 meter band. Since the manual states that the >> tuning bins are 10 kHz wide below 3 MHz, I do a tune at 1805, 1815 ... up to >> about 1895. My antenna is an impossible load above 1900 kHz, so I don't try >> to tune up there. Since I don't have exactly a great antenna system, I >> almost always stick to S&P operation in 160 meter contests. As I tune across >> the band I can hear the relays selecting the appropriate tuning solutions. >> But... every once in awhile, as soon as I key the transmitter I hear the >> relays in the KAT500 switch, presumably out of the commanded tuning bin due >> to frequency measurement error in the RF detection circuit. This shouldn't >> be a problem, since the tuning doesn't change significantly between adjacent >> bins. However, since the amp is being keyed while the tuner is changing >> presets, the a mp immediately faults and goes off line. This is very annoying, and probably not so good for either the amp or the tuner. If the RF measurement resolution is really as poor as 8kHz, I don't see why there's any point in providing for 10 kHz wide tuning bins on the low bands. I would also strongly agree that if good frequency information is available to the tuner via the serial bus that's what it should use to select tuning bins. The RF sensing information should be a backup source, to be relied on only in the absence of such data. > ______________________________________________________________ > 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 jackbrin...@me.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
