Thanks. That's good detail. I'll recheck the manual once more. I made a common mistake of assuming too much and not reading enough. I have tremendous respect and faith in the engineering put into the system of the Elecraft line.. That's a long way of saying, It works brilliantly.
I just want to avoid a mistake in where the ATU-500 and KPA-500 are trying to resolve a tune whilst the CW spews forth. This comment and the prior comment about the Kenwood aspect (and related command-set mentioned) are interesting. Thanks. Aside from all that -- when folks here use the "SWR Thresholds" and use the K3+KAT+KPA chain via Aux Serial data sharing -- what do you use for the three metrics in SWR Thresholds? There's a KPA Inhibit SWR, Re-tune SWR and Bypass SWR value. The recommended values in the manuals seem frightfully high for my nerves to handle. Any advice on *that* would be welcomed. HNY, Thanks. --- 73, Jeff W7BRS https://blog.w7brs.com On Monday, January 1st, 2024 at 4:37 PM, G4GNX <g4...@g4gnx.com> wrote: > AFAICR the manual says that if an AUX cable is connected between the KAT500 > and the radio, the KAT500 will follow any frequency/band change and if a > tuning solution has already been stored for that frequency/band it will be > employed before the radio goes into TX. In other words, whilst the radio is > still in RX mode. > > However, elsewhere in the manual it says that when the KAT500 receives RF, it > will also pickup the nearest tuning solution, which is a fail-safe action in > case the KAT500 does not receive data from the radio, for any reason. > > This is only if the radio is a K3, K3S or K4 and if a KPA500 is in use, RF > from it is sent to the KAT500 but the AUX cable must be connected AFTER the > KAT500. i.e. K3———KAT500———KPA500. > > I make no comment about using the KAT500 with a Kenwood (or other) rig. > > 73, > Alan - G4GNX > South Coast UK > Elecraft K4D / KPA500 / KAT500 / IC-9700 > > > > > On 1 Jan 2024, at 21:56, Andy Durbin a.dur...@msn.com wrote: > > > > "> How does your KAT500 know what frequency to use? Does it have a serial > > data interface or does it depend only on the internal RF counter? > > > > W7BRS> AUX cable between K3 to KAT-500 and KAT-500 to KPA-500. They are in > > serial communication per Elecraft protcol(s), whatever those are. > > > > > What KAT500 mode (AUTO, MAN, BYP) is selected when you observe this > > > anomaly? > > > > W7BRS> Per manual for KAT-500/KPA-500 the stated "nominal" mode is MAN. So > > I leave the KAT-500 in MAN after tuning the antenna to 1.1." > > > > Your problem sounded a bit like the conflict between serial data frequency > > and RF count when operating near a "bin" boundary. However, my only > > experience with that problem is with Kenwood rigs using serial data to > > provide frequency to KAT500. I have no experience with AUXBus. > > > > For Kenwood owners one solution was to use the FDT command to desensitize > > the RF counter so serial data frequency always had priority. The command > > description implies it is equally applicable to AUXBus so may be worth > > experimenting. > > > > "FDT Frequency Counter Distance for Retune > > GET format: FDT; > > SET/RESPONSE format: FDT nn; where nn is the distance, in kHz, between the > > current ATU frequency and the most recent TX frequency count for the ATU to > > change ATU settings to the new frequency. The value is between 0 > > (interpreted as the default of 10 kHz) thru 65535, which disables ATU > > tuning based on frequency count. This is intended for customers that prefer > > the KAT500 only follow the frequency provided by a serial port command or > > the K3/K3S/K4 AUXBUS, or select a minimum distance between current ATU > > frequency and a newly counted frequency. > > FDT was introduced in firmware version 01.99." > > > > Andy, k3wyc > > > ______________________________________________________________ > 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 j...@w7brs.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
