Re: [Elecraft] Wish I had a KAT1500
Bill, While it is true what you said, the KAT500 or ATU in the KPA1500 will generally do a good job. The tuner should be "trained" to the antenna(s) in AUTO and then placed in MAN for operation. That will prevent the ATU from attempting to tune when it falsely detects a high SWR - usually only happens with SSB operation, or frequency sensing of a frequency where the ATU has not been "trained" to store the L/C values appropriate to the antenna selected. 73, Don W3FPR On 11/29/2018 9:16 PM, Bill Johnson wrote: And a poor antenna system cannot be "fixed" by any a antenna tuner, especially an automatic one. Good luck turning manually. Even AI cannot fix Imbecilic antennas! 73, Bill K9YEQ *From:* Eric Swartz - WA6HHQ, Elecraft *Sent:* Thursday, November 29, 2018 4:09:05 PM *To:* Victor Rosenthal 4X6GP; Bill Johnson; donw...@embarqmail.com; Elecraft Reflector *Subject:* Re: [Elecraft] Wish I had a KAT1500 Folks - If the untuned SWR presented to the KAT500 is above 3:1 or so at a KW and above, it will automatically go into bypass to protect its components. Eric /elecraft.com/ On 11/27/2018 12:15 PM, Victor Rosenthal 4X6GP wrote: I would worry about exceeding voltage ratings on capacitors even if it was pre-tuned. I believe in judiciously exceeding ratings of conservatively rated devices, but this doesn't seem "judicious!" 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/11/2018 21:53, Bill Johnson wrote: If you manually tune at low power first, then there should rarely be an issue. Frequency hopping with the segments memorized should yield good results as well. If there are changes in the antenna due to wind, moisture, reaction to other materials, etc., then one can expect the tuning to need adjustment even if recently tuned. As you probably know, there is more to tuning than just an SWR reading. I do not hesitate running my KPA1500 into 1.7 to 1 as indicated on my W2 without retuning. 73, Bill K9YEQ https://wrj-tech.com/ -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Victor Rosenthal 4X6GP Sent: Tuesday, November 27, 2018 1:43 PM To: donw...@embarqmail.com; Elecraft Reflector Subject: Re: [Elecraft] Wish I had a KAT1500 My somewhat unique antenna system presents SWRs up to about 8:1 on some bands, so this would be kind of limiting. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/11/2018 18:39, Don Wilhelm wrote: Vic, >From what I have heard, the KAT500 will handle 1500 watts, but at an SWR of only 3:1 - that is the same as the ATU in the KPA1500 can handle. At lower power (its rated power of 500 watts) the KPA500 will tune a 10:1 SWR. 73, Don W3FPR On 11/27/2018 10:32 AM, Victor Rosenthal 4X6GP wrote: I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1 SWR on HF. Oh yes, it has to handle 1.5 kW, too. If Elecraft would beef up the KAT500 to meet the above specs, I'd buy one. __ 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 eric.swa...@elecraft.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
Re: [Elecraft] Wish I had a KAT1500
And a poor antenna system cannot be "fixed" by any a antenna tuner, especially an automatic one. Good luck turning manually. Even AI cannot fix Imbecilic antennas! 73, Bill K9YEQ From: Eric Swartz - WA6HHQ, Elecraft Sent: Thursday, November 29, 2018 4:09:05 PM To: Victor Rosenthal 4X6GP; Bill Johnson; donw...@embarqmail.com; Elecraft Reflector Subject: Re: [Elecraft] Wish I had a KAT1500 Folks - If the untuned SWR presented to the KAT500 is above 3:1 or so at a KW and above, it will automatically go into bypass to protect its components. Eric elecraft.com On 11/27/2018 12:15 PM, Victor Rosenthal 4X6GP wrote: I would worry about exceeding voltage ratings on capacitors even if it was pre-tuned. I believe in judiciously exceeding ratings of conservatively rated devices, but this doesn't seem "judicious!" 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/11/2018 21:53, Bill Johnson wrote: If you manually tune at low power first, then there should rarely be an issue. Frequency hopping with the segments memorized should yield good results as well. If there are changes in the antenna due to wind, moisture, reaction to other materials, etc., then one can expect the tuning to need adjustment even if recently tuned. As you probably know, there is more to tuning than just an SWR reading. I do not hesitate running my KPA1500 into 1.7 to 1 as indicated on my W2 without retuning. 73, Bill K9YEQ https://wrj-tech.com/ -Original Message- From: elecraft-boun...@mailman.qth.net<mailto:elecraft-boun...@mailman.qth.net> <mailto:elecraft-boun...@mailman.qth.net> On Behalf Of Victor Rosenthal 4X6GP Sent: Tuesday, November 27, 2018 1:43 PM To: donw...@embarqmail.com<mailto:donw...@embarqmail.com>; Elecraft Reflector <mailto:elecraft@mailman.qth.net> Subject: Re: [Elecraft] Wish I had a KAT1500 My somewhat unique antenna system presents SWRs up to about 8:1 on some bands, so this would be kind of limiting. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/11/2018 18:39, Don Wilhelm wrote: Vic, >From what I have heard, the KAT500 will handle 1500 watts, but at an SWR of only 3:1 - that is the same as the ATU in the KPA1500 can handle. At lower power (its rated power of 500 watts) the KPA500 will tune a 10:1 SWR. 73, Don W3FPR On 11/27/2018 10:32 AM, Victor Rosenthal 4X6GP wrote: I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1 SWR on HF. Oh yes, it has to handle 1.5 kW, too. If Elecraft would beef up the KAT500 to meet the above specs, I'd buy one. __ 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 eric.swa...@elecraft.com<mailto:eric.swa...@elecraft.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
Re: [Elecraft] Wish I had a KAT1500
Folks - If the untuned SWR presented to the KAT500 is above 3:1 or so at a KW and above, it will automatically go into bypass to protect its components. Eric /elecraft.com/ On 11/27/2018 12:15 PM, Victor Rosenthal 4X6GP wrote: I would worry about exceeding voltage ratings on capacitors even if it was pre-tuned. I believe in judiciously exceeding ratings of conservatively rated devices, but this doesn't seem "judicious!" 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/11/2018 21:53, Bill Johnson wrote: If you manually tune at low power first, then there should rarely be an issue. Frequency hopping with the segments memorized should yield good results as well. If there are changes in the antenna due to wind, moisture, reaction to other materials, etc., then one can expect the tuning to need adjustment even if recently tuned. As you probably know, there is more to tuning than just an SWR reading. I do not hesitate running my KPA1500 into 1.7 to 1 as indicated on my W2 without retuning. 73, Bill K9YEQ https://wrj-tech.com/ -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Victor Rosenthal 4X6GP Sent: Tuesday, November 27, 2018 1:43 PM To: donw...@embarqmail.com; Elecraft Reflector Subject: Re: [Elecraft] Wish I had a KAT1500 My somewhat unique antenna system presents SWRs up to about 8:1 on some bands, so this would be kind of limiting. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/11/2018 18:39, Don Wilhelm wrote: Vic, From what I have heard, the KAT500 will handle 1500 watts, but at an SWR of only 3:1 - that is the same as the ATU in the KPA1500 can handle. At lower power (its rated power of 500 watts) the KPA500 will tune a 10:1 SWR. 73, Don W3FPR On 11/27/2018 10:32 AM, Victor Rosenthal 4X6GP wrote: I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1 SWR on HF. Oh yes, it has to handle 1.5 kW, too. If Elecraft would beef up the KAT500 to meet the above specs, I'd buy one. __ 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 eric.swa...@elecraft.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
Re: [Elecraft] Wish I had a KAT1500
Try MFJ-998. It matches my 80m flattop fed by ladderline on 160, 80 and 40m (high impedance full wave) using 1:1 balun. I use it for 40 and 80m running at 1.5 KW level. It had a number of small problems but no problems with relays/caps/inductors. When everything is set up well, it recalls old setting in a fraction of a second. It has output for 2 antennas. When each antenna is prematched, once you change frequency with antenna A and the switch to B, it is automatically matched as well. Ignacy, NO9E -- Sent from: http://elecraft.365791.n2.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Wish I had a KAT1500
Sold new in 1988 for $995. Used market today about $450 to $650 depending on condition. Rated at 2KW with 10:1 SWR 1.8 MHz to 30 MHz. 73 Bob, K4TAX On 11/27/2018 7:21 PM, AB4IQ wrote: Ten Tec made the 253 automatic tuner and a friend of mine bought his in 1988 or so and still uses it daily with his Orion II and 425 Titan. Ed.. AB4IQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Peter Dougherty (W2IRT) Sent: Tuesday, November 27, 2018 6:40 PM To: 'Victor Rosenthal 4X6GP' ; 'Elecraft Reflector' Subject: Re: [Elecraft] Wish I had a KAT1500 I agree, Victor! I have a newer HF-Auto which is even more problematic than the AT-Auto. The issues for me are 40 and 80. I have a shorty forty Yagi, with about 175 kHz between the 2:1 points. Since I normally operate in the bottom end of the band (CW and occasionally FT8) I set the resonant point around 7040, which makes it usable all the way to the bottom of the phone band. But on phone, the SWR varies from 2:1 at 7128 to about 8:1 at 7300. It's equally problematic on 80 (resonant 3575, 3:1 points 3500 to 3675 to make the KPA-1500 happy). Above 40, and 160m, my antennas are resonant. I'd pay anything for an auto-tuner that can handle full power, works properly every time and uses band data, rather than RF sensing (which is how the HF-Auto works). I don't have a tower that can handle a full-size/full-bandwidth 40m Yagi as well as everything else I need up there, so I'm reliant on a tuner to make things usable. I remote in to my station once in a while, and I'm at a big disadvantage on 40 when I need to go on phone. I'm almost never on 80 phone (except for two contest weekends a year) so that's not a big problem. I can't believe that nobody in the ham community has come out with a 5kW-rated 10:1 fully automatic tuner, with everything else that's been done lately. Regards, Peter Dougherty, W2IRT DXCC Card Checker/CQ-WAZ Checkpoint www.facebook.com/W2IRT -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Victor Rosenthal 4X6GP Sent: Tuesday, November 27, 2018 10:32 AM To: Elecraft Reflector Subject: [Elecraft] Wish I had a KAT1500 I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1 SWR on HF. Oh yes, it has to handle 1.5 kW, too. If Elecraft would beef up the KAT500 to meet the above specs, I'd buy one. -- 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ __ 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 li...@w2irt.net __ 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 ab...@comcast.net __ 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 rmcg...@blomand.net __ 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
Re: [Elecraft] Wish I had a KAT1500
Ten Tec made the 253 automatic tuner and a friend of mine bought his in 1988 or so and still uses it daily with his Orion II and 425 Titan. Ed.. AB4IQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Peter Dougherty (W2IRT) Sent: Tuesday, November 27, 2018 6:40 PM To: 'Victor Rosenthal 4X6GP' ; 'Elecraft Reflector' Subject: Re: [Elecraft] Wish I had a KAT1500 I agree, Victor! I have a newer HF-Auto which is even more problematic than the AT-Auto. The issues for me are 40 and 80. I have a shorty forty Yagi, with about 175 kHz between the 2:1 points. Since I normally operate in the bottom end of the band (CW and occasionally FT8) I set the resonant point around 7040, which makes it usable all the way to the bottom of the phone band. But on phone, the SWR varies from 2:1 at 7128 to about 8:1 at 7300. It's equally problematic on 80 (resonant 3575, 3:1 points 3500 to 3675 to make the KPA-1500 happy). Above 40, and 160m, my antennas are resonant. I'd pay anything for an auto-tuner that can handle full power, works properly every time and uses band data, rather than RF sensing (which is how the HF-Auto works). I don't have a tower that can handle a full-size/full-bandwidth 40m Yagi as well as everything else I need up there, so I'm reliant on a tuner to make things usable. I remote in to my station once in a while, and I'm at a big disadvantage on 40 when I need to go on phone. I'm almost never on 80 phone (except for two contest weekends a year) so that's not a big problem. I can't believe that nobody in the ham community has come out with a 5kW-rated 10:1 fully automatic tuner, with everything else that's been done lately. Regards, Peter Dougherty, W2IRT DXCC Card Checker/CQ-WAZ Checkpoint www.facebook.com/W2IRT -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Victor Rosenthal 4X6GP Sent: Tuesday, November 27, 2018 10:32 AM To: Elecraft Reflector Subject: [Elecraft] Wish I had a KAT1500 I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1 SWR on HF. Oh yes, it has to handle 1.5 kW, too. If Elecraft would beef up the KAT500 to meet the above specs, I'd buy one. -- 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ __ 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 li...@w2irt.net __ 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 ab...@comcast.net __ 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
Re: [Elecraft] Wish I had a KAT1500
I agree, Victor! I have a newer HF-Auto which is even more problematic than the AT-Auto. The issues for me are 40 and 80. I have a shorty forty Yagi, with about 175 kHz between the 2:1 points. Since I normally operate in the bottom end of the band (CW and occasionally FT8) I set the resonant point around 7040, which makes it usable all the way to the bottom of the phone band. But on phone, the SWR varies from 2:1 at 7128 to about 8:1 at 7300. It's equally problematic on 80 (resonant 3575, 3:1 points 3500 to 3675 to make the KPA-1500 happy). Above 40, and 160m, my antennas are resonant. I'd pay anything for an auto-tuner that can handle full power, works properly every time and uses band data, rather than RF sensing (which is how the HF-Auto works). I don't have a tower that can handle a full-size/full-bandwidth 40m Yagi as well as everything else I need up there, so I'm reliant on a tuner to make things usable. I remote in to my station once in a while, and I'm at a big disadvantage on 40 when I need to go on phone. I'm almost never on 80 phone (except for two contest weekends a year) so that's not a big problem. I can't believe that nobody in the ham community has come out with a 5kW-rated 10:1 fully automatic tuner, with everything else that's been done lately. Regards, Peter Dougherty, W2IRT DXCC Card Checker/CQ-WAZ Checkpoint www.facebook.com/W2IRT -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Victor Rosenthal 4X6GP Sent: Tuesday, November 27, 2018 10:32 AM To: Elecraft Reflector Subject: [Elecraft] Wish I had a KAT1500 I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1 SWR on HF. Oh yes, it has to handle 1.5 kW, too. If Elecraft would beef up the KAT500 to meet the above specs, I'd buy one. -- 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ __ 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 li...@w2irt.net __ 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
Re: [Elecraft] Wish I had a KAT1500
I would worry about exceeding voltage ratings on capacitors even if it was pre-tuned. I believe in judiciously exceeding ratings of conservatively rated devices, but this doesn't seem "judicious!" 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/11/2018 21:53, Bill Johnson wrote: If you manually tune at low power first, then there should rarely be an issue. Frequency hopping with the segments memorized should yield good results as well. If there are changes in the antenna due to wind, moisture, reaction to other materials, etc., then one can expect the tuning to need adjustment even if recently tuned. As you probably know, there is more to tuning than just an SWR reading. I do not hesitate running my KPA1500 into 1.7 to 1 as indicated on my W2 without retuning. 73, Bill K9YEQ https://wrj-tech.com/ -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Victor Rosenthal 4X6GP Sent: Tuesday, November 27, 2018 1:43 PM To: donw...@embarqmail.com; Elecraft Reflector Subject: Re: [Elecraft] Wish I had a KAT1500 My somewhat unique antenna system presents SWRs up to about 8:1 on some bands, so this would be kind of limiting. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/11/2018 18:39, Don Wilhelm wrote: Vic, From what I have heard, the KAT500 will handle 1500 watts, but at an SWR of only 3:1 - that is the same as the ATU in the KPA1500 can handle. At lower power (its rated power of 500 watts) the KPA500 will tune a 10:1 SWR. 73, Don W3FPR On 11/27/2018 10:32 AM, Victor Rosenthal 4X6GP wrote: I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1 SWR on HF. Oh yes, it has to handle 1.5 kW, too. If Elecraft would beef up the KAT500 to meet the above specs, I'd buy one. __ 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
Re: [Elecraft] Wish I had a KAT1500
If you manually tune at low power first, then there should rarely be an issue. Frequency hopping with the segments memorized should yield good results as well. If there are changes in the antenna due to wind, moisture, reaction to other materials, etc., then one can expect the tuning to need adjustment even if recently tuned. As you probably know, there is more to tuning than just an SWR reading. I do not hesitate running my KPA1500 into 1.7 to 1 as indicated on my W2 without retuning. 73, Bill K9YEQ https://wrj-tech.com/ -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Victor Rosenthal 4X6GP Sent: Tuesday, November 27, 2018 1:43 PM To: donw...@embarqmail.com; Elecraft Reflector Subject: Re: [Elecraft] Wish I had a KAT1500 My somewhat unique antenna system presents SWRs up to about 8:1 on some bands, so this would be kind of limiting. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/11/2018 18:39, Don Wilhelm wrote: > Vic, > > From what I have heard, the KAT500 will handle 1500 watts, but at an > SWR of only 3:1 - that is the same as the ATU in the KPA1500 can handle. > At lower power (its rated power of 500 watts) the KPA500 will tune a > 10:1 SWR. > > 73, > Don W3FPR > > On 11/27/2018 10:32 AM, Victor Rosenthal 4X6GP wrote: >> I am using an older Palstar AT-Auto automatic tuner. It has a coil >> and capacitor operated by stepper motors. When it works, it's fine; >> but it requires a lot of maintenance and fiddling. What I need is >> something that works as well as the KAT3 in my K3; quick, >> trouble-free, and good for a 10:1 SWR on HF. >> >> Oh yes, it has to handle 1.5 kW, too. >> >> If Elecraft would beef up the KAT500 to meet the above specs, I'd buy >> one. __ 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 k9...@live.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
Re: [Elecraft] Wish I had a KAT1500
My somewhat unique antenna system presents SWRs up to about 8:1 on some bands, so this would be kind of limiting. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 27/11/2018 18:39, Don Wilhelm wrote: Vic, From what I have heard, the KAT500 will handle 1500 watts, but at an SWR of only 3:1 - that is the same as the ATU in the KPA1500 can handle. At lower power (its rated power of 500 watts) the KPA500 will tune a 10:1 SWR. 73, Don W3FPR On 11/27/2018 10:32 AM, Victor Rosenthal 4X6GP wrote: I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1 SWR on HF. Oh yes, it has to handle 1.5 kW, too. If Elecraft would beef up the KAT500 to meet the above specs, I'd buy one. __ 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
Re: [Elecraft] Wish I had a KAT1500
From the KAT500 manual: 3 - 30 MHz 1000 W into 16 ohms to 150 ohms (3:1 SWR) 1.8 - 2 MHz 600 W into 10 ohms to 500 ohms(5:1 Low Impedance, 10:1 High Impedance SWR) 30 - 60 MHz 500 W into 5:1 SWR (10 ohms to 250 ohms) "The cabling diagrams show how to use the KAT500 with any transceiver and amplifier in the 10 to 1000 watt output range." I find with mine, in some cases the ATU will resolve a match at 20 watts, but at 500 watts it goes into a FAULT mode. This indicates power must be reduced to prevent damage as the SWR being resolved is outside of the power range of the tuner. In all aspects, with the KPA500 and my antennas, it provides outstanding performance. 73 Bob, K4TAX On 11/27/2018 10:39 AM, Don Wilhelm wrote: Vic, From what I have heard, the KAT500 will handle 1500 watts, but at an SWR of only 3:1 - that is the same as the ATU in the KPA1500 can handle. At lower power (its rated power of 500 watts) the KPA500 will tune a 10:1 SWR. 73, Don W3FPR On 11/27/2018 10:32 AM, Victor Rosenthal 4X6GP wrote: I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1 SWR on HF. Oh yes, it has to handle 1.5 kW, too. If Elecraft would beef up the KAT500 to meet the above specs, I'd buy one. __ 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 rmcg...@blomand.net __ 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
Re: [Elecraft] Wish I had a KAT1500
Vic, From what I have heard, the KAT500 will handle 1500 watts, but at an SWR of only 3:1 - that is the same as the ATU in the KPA1500 can handle. At lower power (its rated power of 500 watts) the KPA500 will tune a 10:1 SWR. 73, Don W3FPR On 11/27/2018 10:32 AM, Victor Rosenthal 4X6GP wrote: I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1 SWR on HF. Oh yes, it has to handle 1.5 kW, too. If Elecraft would beef up the KAT500 to meet the above specs, I'd buy one. __ 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
[Elecraft] Wish I had a KAT1500
I am using an older Palstar AT-Auto automatic tuner. It has a coil and capacitor operated by stepper motors. When it works, it's fine; but it requires a lot of maintenance and fiddling. What I need is something that works as well as the KAT3 in my K3; quick, trouble-free, and good for a 10:1 SWR on HF. Oh yes, it has to handle 1.5 kW, too. If Elecraft would beef up the KAT500 to meet the above specs, I'd buy one. -- 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ __ 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
