Re: [Elecraft] KAT500 LC settings recall -- complete explanation
I have been reading some of the KAT500 traffic and thought I'd weigh in with my particular thoughts. One reason to have the tuner follow the VFO is that I would like to use the KAT500 for receive sometimes for SWL'ing or listening to BCB. In this case, I can't transmit, so it would be nice to have the tuner track the VFO. One option is to use the utility to manually select settings, but my KAT500 is remoted at the base of my antenna in a waterproof box. A USB cable of the required length is not feasible, but I am looking into using a wireless USB extender for the task. I already have some wireless RS232 serial extenders, but have never tried one for USB. The prices are all over the place. Does anyone have any experience with these devices, with or without the KAT500? Would they be safe for flashing firmware? Even with the utility connected, though, there doesn't appear to be any easy way to save setups based on names or frequencies. Maybe I've missed it since I'm not using the utility. 73, Larry N8LP On 12/25/2012 12:00 PM, elecraft-requ...@mailman.qth.net wrote: Date: Mon, 24 Dec 2012 12:54:36 -0800 From: Wayne Burdickn...@elecraft.com To: ab2tcab...@arrl.net Cc:elecraft@mailman.qth.net Subject: [Elecraft] KAT500 LC settings recall -- complete explanation (including auxBus tradeoffs) Message-ID:c5be2d64-b735-4503-a2bf-897794ecf...@elecraft.com Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes So what we're talking about now is whether it would be worth sending frequency data from the K3 to the KAT500--at the time of keying--over either the auxBus or the RS232 port. The answer, IMHO, is no. In either case it would take approximately the same amount of time to send the data as it would for the KAT500 to do RF sensing of the VFO frequency. If someone has a better idea or would like to explain their operating scenario further, I'm all ears. 73, Wayne N6KR __ 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
Re: [Elecraft] KAT500 LC settings recall -- complete explanation
You can retune to a prior memory setting by sending a serial command, MT ; where is the frequency in kHz. But as you note, it requires a serial connection. But if you're not counting Tx frequency, you'd need some sort of connection to adjust the tuner... 73 de Dick, K6KR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Larry Phipps Sent: Wednesday, December 26, 2012 11:29 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KAT500 LC settings recall -- complete explanation I have been reading some of the KAT500 traffic and thought I'd weigh in with my particular thoughts. One reason to have the tuner follow the VFO is that I would like to use the KAT500 for receive sometimes for SWL'ing or listening to BCB. In this case, I can't transmit, so it would be nice to have the tuner track the VFO. One option is to use the utility to manually select settings, but my KAT500 is remoted at the base of my antenna in a waterproof box. A USB cable of the required length is not feasible, but I am looking into using a wireless USB extender for the task. I already have some wireless RS232 serial extenders, but have never tried one for USB. The prices are all over the place. Does anyone have any experience with these devices, with or without the KAT500? Would they be safe for flashing firmware? Even with the utility connected, though, there doesn't appear to be any easy way to save setups based on names or frequencies. Maybe I've missed it since I'm not using the utility. 73, Larry N8LP On 12/25/2012 12:00 PM, elecraft-requ...@mailman.qth.net wrote: Date: Mon, 24 Dec 2012 12:54:36 -0800 From: Wayne Burdickn...@elecraft.com To: ab2tcab...@arrl.net Cc:elecraft@mailman.qth.net Subject: [Elecraft] KAT500 LC settings recall -- complete explanation (including auxBus tradeoffs) Message-ID:c5be2d64-b735-4503-a2bf-897794ecf...@elecraft.com Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes So what we're talking about now is whether it would be worth sending frequency data from the K3 to the KAT500--at the time of keying--over either the auxBus or the RS232 port. The answer, IMHO, is no. In either case it would take approximately the same amount of time to send the data as it would for the KAT500 to do RF sensing of the VFO frequency. If someone has a better idea or would like to explain their operating scenario further, I'm all ears. 73, Wayne N6KR __ 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 __ 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
Re: [Elecraft] KAT500 LC settings recall -- complete explanation
i bought one a while back for about 70 bucks. Its an IO Gear GUCE50. I've had varying success with it. Currently I use it to extend my USB from my media server into the living room to allow for connection of a IR receiver. For a while I was also using a USB to fiber optic sound card so based on that I think that firmware updates would be acceptable. In Linux I'd had some issues with the computer crashing and the dmesg log actually stated that the USB stack blew up and it said Possible EMI?. However in Windows I'd never had any of these issues. Once I changed my antenna system up a bit I've had no issues what-so-ever even with 500 watts. If you have any further questions feel free to ask. ~Brett On Wed, Dec 26, 2012 at 2:51 PM, Dick Dievendorff die...@comcast.netwrote: You can retune to a prior memory setting by sending a serial command, MT ; where is the frequency in kHz. But as you note, it requires a serial connection. But if you're not counting Tx frequency, you'd need some sort of connection to adjust the tuner... 73 de Dick, K6KR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Larry Phipps Sent: Wednesday, December 26, 2012 11:29 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KAT500 LC settings recall -- complete explanation I have been reading some of the KAT500 traffic and thought I'd weigh in with my particular thoughts. One reason to have the tuner follow the VFO is that I would like to use the KAT500 for receive sometimes for SWL'ing or listening to BCB. In this case, I can't transmit, so it would be nice to have the tuner track the VFO. One option is to use the utility to manually select settings, but my KAT500 is remoted at the base of my antenna in a waterproof box. A USB cable of the required length is not feasible, but I am looking into using a wireless USB extender for the task. I already have some wireless RS232 serial extenders, but have never tried one for USB. The prices are all over the place. Does anyone have any experience with these devices, with or without the KAT500? Would they be safe for flashing firmware? Even with the utility connected, though, there doesn't appear to be any easy way to save setups based on names or frequencies. Maybe I've missed it since I'm not using the utility. 73, Larry N8LP On 12/25/2012 12:00 PM, elecraft-requ...@mailman.qth.net wrote: Date: Mon, 24 Dec 2012 12:54:36 -0800 From: Wayne Burdickn...@elecraft.com To: ab2tcab...@arrl.net Cc:elecraft@mailman.qth.net Subject: [Elecraft] KAT500 LC settings recall -- complete explanation (including auxBus tradeoffs) Message-ID:c5be2d64-b735-4503-a2bf-897794ecf...@elecraft.com Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes So what we're talking about now is whether it would be worth sending frequency data from the K3 to the KAT500--at the time of keying--over either the auxBus or the RS232 port. The answer, IMHO, is no. In either case it would take approximately the same amount of time to send the data as it would for the KAT500 to do RF sensing of the VFO frequency. If someone has a better idea or would like to explain their operating scenario further, I'm all ears. 73, Wayne N6KR __ 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 __ 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 __ 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
[Elecraft] KAT500 LC settings recall -- complete explanation (including auxBus tradeoffs)
ab2tc wrote: ...the question is if it's worth doing to save that one little squirt of RF needed to tell the tuner the exact frequency. At present the KAT500 works exactly the same as the KAT3: (1) On any band change or antenna change, the last-used LC settings for that band and antenna are immediately recalled. (2) Every time you transmit, the VFO frequency is determined (using RF sensing in the case of the KAT500). This is then converted to a segment number within the present band. The segment number is used to look up LC settings from the current segment or from the closest one for which LC settings are available. If the LC settings need to be changed, this is accomplished very quickly -- typically in 5 to 10 ms. When we first wrote the KAT3 firmware, we tried having LC settings recalled as you tune, in receive mode. This was extremely distracting. It would be even more so with the KAT500 since it has much larger relays. So what we're talking about now is whether it would be worth sending frequency data from the K3 to the KAT500--at the time of keying--over either the auxBus or the RS232 port. The answer, IMHO, is no. In either case it would take approximately the same amount of time to send the data as it would for the KAT500 to do RF sensing of the VFO frequency. If someone has a better idea or would like to explain their operating scenario further, I'm all ears. 73, Wayne N6KR __ 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
Re: [Elecraft] KAT500 LC settings recall -- complete explanation (including auxBus tradeoffs)
Wayne wrote: So what we're talking about now is whether it would be worth sending frequency data from the K3 to the KAT500--at the time of keying--over either the auxBus or the RS232 port. The answer, IMHO, is no. In either case it would take approximately the same amount of time to send the data as it would for the KAT500 to do RF sensing of the VFO frequency. Well, if at at key time the KAT500 already knew the new frequency it could update the relays immediately without measuring the frequency. If this takes 5-10ms, the normal keytime to RF output time delay should prevent hot switching of the relays. What this means in practice is that operators could go right ahead with full power. AB2TC - Knut -- View this message in context: http://elecraft.365791.n2.nabble.com/KAT500-and-OT-Is-a-tuner-using-VNA-feasible-tp7567559p7567652.html Sent from the Elecraft mailing list archive at Nabble.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
Re: [Elecraft] KAT500 LC settings recall -- complete explanation (including auxBus tradeoffs)
During a contest and for many ops with headphones on you wouldn't hear the relays. Make it an option. As for the timing if the KAT500 tunes as the receiver is tuned timing is zero. 73, Keith, XE3/K5ENS -- View this message in context: http://elecraft.365791.n2.nabble.com/KAT500-and-OT-Is-a-tuner-using-VNA-feasible-tp7567559p7567654.html Sent from the Elecraft mailing list archive at Nabble.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
Re: [Elecraft] KAT500 LC settings recall -- complete explanation (including auxBus tradeoffs)
Keith-K5ENS wrote: During a contest and for many ops with headphones on you wouldn't hear the relays. Make it an option. It's a possibility. I'll look into it. Wayne __ 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
