Silence doesn't mean there are those of us who haven't had issues with other automatics. I have had issues using other tuners, MFJ, Etc. I still use an MFJ 998 external to the shack, and I have some issues with weather; rain, ice and snow with any tuner. I did get MFJ to replace my first 998 after a yearlong hassle. The replacement seems to be better.
Using high power requires lots more care. I know Dick D. will get some of this fixed for the K-Line in firmware, but the antenna, connectors and common current issues are our problems. Running troublesome antenna setups can be hazardous at high power. I have a couple of burned insulators to demonstrate the power of high power RF. Antenna failure can happen. I think it best to focus on the Elecraft equipment rather than get into a discussion of other brands as these are not at issue. 73, Bill K9YEQ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Richard Solomon Sent: Tuesday, December 31, 2013 9:05 AM To: [email protected] Subject: Re: [Elecraft] K3/KPA500/KAT500 SWR problem What concerns me about all this talk of Reflected Power, local High Power Stations, etc., is that none of the other users of Automatic Antenna Tuners (non-Elecraft) have reported similar problems. I hope the issue can be corrected via firmware. We will be awaiting the results of their studies. 73 es HNY, Dick, W1KSZ On 12/31/2013 5:41 AM, Phil & Debbie Salas wrote: > I haven’t had this problem. However, in addition to Igor’s thoughts on a > high reflected signal, here is another thought. A strong signal (like you > can have in contest environment and/or multi-transmitter/multi-antenna > set-up) could be counted by the KAT500 frequency counter resulting in the > KAT500 jumping to a different memorized frequency setting. I don’t know what > the threshold sensitivity of the KAT500 counter is, but incoming signals can > be very high under some conditions. I wonder if disabling the internal > KAT500 frequency counter might be something to try – especially when band > data is provided by the auxbus cable. > > Phil – AD5X > > “It may be not relevant to this particular case but another reason for weird > KAT500 behavior can be strong interfering signal of a neighbor or nearby > broadcasting station. I did run into situations where such signals induced up > to 5 volts into low band antenna. Then KAT500 counts that signal as reflected > and thinks that SWR is very high. One may try to connect broadband spectrum > analyzer to the antenna and see what is going on. If it is broadcasting > signal well below ham bands then high pass filter between the tuner and > antenna can help.73, Igor UA9CDC” > ______________________________________________________________ > 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 ______________________________________________________________ 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 ______________________________________________________________ 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
