Re: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500 (Video)
From what I read in the manual, although it would be difficult to satisfy in every way all the non-Elecraft amps, there are some thoughtful safeguards built into the KAT500 which should help. One that comes to mind is that it doesn't drop the key line if the power is over a certain amount (29 watts default). While that would not hurt the KAP500, some other amps would be damaged if the key line was to be opened when they are producing full power. The KAT500 manual is on line and addresses the use of other than Elecraft amps. - Chuck, KE9UW -- View this message in context: http://elecraft.365791.n2.nabble.com/KAT500-Help-with-KeyLine-Interrupt-on-KPA500-Video-tp7566844p7566948.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] Help with KeyLine Interrupt on KPA500 (Video)
From what I read in the manual, although it would be difficult to satisfy in every way all the non-Elecraft amps, there are some thoughtful safeguards built into the KAT500 which should help. One that comes to mind is that it doesn't drop the key line if the power is over a certain amount (29 watts default). While that would not hurt the KAP500, some other amps would be damaged if the key line was to be opened when they are producing full power. The KAT500 manual is on line and addresses the use of other than Elecraft amps. - Chuck, KE9UW -- View this message in context: http://elecraft.365791.n2.nabble.com/KAT500-Help-with-KeyLine-Interrupt-on-KPA500-Video-tp7566844p7566949.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] Help with KeyLine Interrupt on KPA500(Video)
IMHO adapting amplifier to work with KAT500 is not the right way of doing it because KAT500 is supposed to work with many different amps of 600 watt class. Yes, PTT is generated by the radio and then passed to KAT500. KAT500 should generate it's own PTT signal for PA based on it's own KAT500 status and incoming PTT signal from the radio. If incoming PTT is present and antenna is matched then KAT500 generates PTT for the amp. This will create additional delay equal to switching time of KAT500 relays (minimum) plus some time required to analyze frequency and bring KAT500 to matching state. That is the price to pay for use of the automatic tuner. This will exclude PA faults and relays hot switching in KAT500. But then this feature can be user selectable. If you do not need it just do not use it. The question remains, is it possible to do it all in the firmware or hardware mods will be required. 73, Igor UA9CDC - Original Message - From: ke9uw c-haw...@illinois.edu To: elecraft@mailman.qth.net Sent: Saturday, December 08, 2012 6:18 PM Subject: Re: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500(Video) The PTT is generated by the transceiver. The KAT500 passes it thru to the amp unless the KAT is tuning a high SWR. The problem is that the amp goes into fault before the KAT can OPEN the key line. Firmware in the KAT with some delay is not the answer...it's already too slow for the amp. If there is any programmable delay in the KAT, then a firmware change might be to speed that up if possible. But I doubt that it is possible since it's a relay opening in the KAT which requires some milliseconds. I'm guessing the only Elecraft solution is to delay the amp's response to the high SWR so it doesn't Fault giving the KAT time to open the key line. So the change in firmware we are waiting on is for the KPA amp. Help me if I'm missing something here. - Chuck, KE9UW -- View this message in context: http://elecraft.365791.n2.nabble.com/KAT500-Help-with-KeyLine-Interrupt-on-KPA500-Video-tp7566844p7566890.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 __ 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] Help with KeyLine Interrupt on KPA500(Video)
This whole issue has been solved by VHF/UHF stations a long time ago. They use a sequencer to key and unkey various components with appropriate delays to prevent damage. They can be built or bought fairly cheaply. Yes it would be desirable to have the sequencing be automatic. One size is unlikely to fit all though. 73 de Brian/K3KO On 12/9/2012 15:02, Igor Sokolov wrote: IMHO adapting amplifier to work with KAT500 is not the right way of doing it because KAT500 is supposed to work with many different amps of 600 watt class. Yes, PTT is generated by the radio and then passed to KAT500. KAT500 should generate it's own PTT signal for PA based on it's own KAT500 status and incoming PTT signal from the radio. If incoming PTT is present and antenna is matched then KAT500 generates PTT for the amp. This will create additional delay equal to switching time of KAT500 relays (minimum) plus some time required to analyze frequency and bring KAT500 to matching state. That is the price to pay for use of the automatic tuner. This will exclude PA faults and relays hot switching in KAT500. But then this feature can be user selectable. If you do not need it just do not use it. The question remains, is it possible to do it all in the firmware or hardware mods will be required. 73, Igor UA9CDC - Original Message - From: ke9uw c-haw...@illinois.edu To: elecraft@mailman.qth.net Sent: Saturday, December 08, 2012 6:18 PM Subject: Re: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500(Video) The PTT is generated by the transceiver. The KAT500 passes it thru to the amp unless the KAT is tuning a high SWR. The problem is that the amp goes into fault before the KAT can OPEN the key line. Firmware in the KAT with some delay is not the answer...it's already too slow for the amp. If there is any programmable delay in the KAT, then a firmware change might be to speed that up if possible. But I doubt that it is possible since it's a relay opening in the KAT which requires some milliseconds. I'm guessing the only Elecraft solution is to delay the amp's response to the high SWR so it doesn't Fault giving the KAT time to open the key line. So the change in firmware we are waiting on is for the KPA amp. Help me if I'm missing something here. - Chuck, KE9UW -- View this message in context: http://elecraft.365791.n2.nabble.com/KAT500-Help-with-KeyLine-Interrupt-on-KPA500-Video-tp7566844p7566890.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 __ 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 - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2634/5446 - Release Date: 12/08/12 - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2634/5446 - Release Date: 12/08/12 __ 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] Help with KeyLine Interrupt on KPA500(Video)
Brian, I fully agree that external sequencer could solve some of the issues discussed. Still I have couple of notes. 1)Sequencers are not designed to work with automatic ATUs because the amount of time required for ATU to reach tuned status is not known forehead. Therefore PTT signal to PA should be generated by ATU because only ATU knows when tuned status is achieved. 2) Since there is PTT for PA connector is already build into ATU, why not allow user to set programmable delay thus excluding the necessity for a separate sequencer? When I go on expedition every extra box (with associated cables and connectors) is counted. 73, Igor UA9CDC - Original Message - From: Brian Alsop als...@nc.rr.com To: elecraft@mailman.qth.net Sent: Sunday, December 09, 2012 9:12 PM Subject: Re: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500(Video) This whole issue has been solved by VHF/UHF stations a long time ago. They use a sequencer to key and unkey various components with appropriate delays to prevent damage. They can be built or bought fairly cheaply. Yes it would be desirable to have the sequencing be automatic. One size is unlikely to fit all though. 73 de Brian/K3KO On 12/9/2012 15:02, Igor Sokolov wrote: IMHO adapting amplifier to work with KAT500 is not the right way of doing it because KAT500 is supposed to work with many different amps of 600 watt class. Yes, PTT is generated by the radio and then passed to KAT500. KAT500 should generate it's own PTT signal for PA based on it's own KAT500 status and incoming PTT signal from the radio. If incoming PTT is present and antenna is matched then KAT500 generates PTT for the amp. This will create additional delay equal to switching time of KAT500 relays (minimum) plus some time required to analyze frequency and bring KAT500 to matching state. That is the price to pay for use of the automatic tuner. This will exclude PA faults and relays hot switching in KAT500. But then this feature can be user selectable. If you do not need it just do not use it. The question remains, is it possible to do it all in the firmware or hardware mods will be required. 73, Igor UA9CDC - Original Message - From: ke9uw c-haw...@illinois.edu To: elecraft@mailman.qth.net Sent: Saturday, December 08, 2012 6:18 PM Subject: Re: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500(Video) The PTT is generated by the transceiver. The KAT500 passes it thru to the amp unless the KAT is tuning a high SWR. The problem is that the amp goes into fault before the KAT can OPEN the key line. Firmware in the KAT with some delay is not the answer...it's already too slow for the amp. If there is any programmable delay in the KAT, then a firmware change might be to speed that up if possible. But I doubt that it is possible since it's a relay opening in the KAT which requires some milliseconds. I'm guessing the only Elecraft solution is to delay the amp's response to the high SWR so it doesn't Fault giving the KAT time to open the key line. So the change in firmware we are waiting on is for the KPA amp. Help me if I'm missing something here. - Chuck, KE9UW -- View this message in context: http://elecraft.365791.n2.nabble.com/KAT500-Help-with-KeyLine-Interrupt-on-KPA500-Video-tp7566844p7566890.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 __ 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 - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2634/5446 - Release Date: 12/08/12 - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2634/5446 - Release Date: 12/08/12 __ 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] Help with KeyLine Interrupt on KPA500 (Video)
You can use the Utility program to change that power limit so the KPA500 will open the key line at higher powers. See Amplifier Key Interrupt Power in your Owner's manual. 73, Ron AC7AC -Original Message- From what I read in the manual, although it would be difficult to satisfy in every way all the non-Elecraft amps, there are some thoughtful safeguards built into the KAT500 which should help. One that comes to mind is that it doesn't drop the key line if the power is over a certain amount (29 watts default). While that would not hurt the KAP500, some other amps would be damaged if the key line was to be opened when they are producing full power. The KAT500 manual is on line and addresses the use of other than Elecraft amps. - Chuck, KE9UW -- __ 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] Help with KeyLine Interrupt on KPA500 (Video)
The PTT is generated by the transceiver. The KAT500 passes it thru to the amp unless the KAT is tuning a high SWR. The problem is that the amp goes into fault before the KAT can OPEN the key line. Firmware in the KAT with some delay is not the answer...it's already too slow for the amp. If there is any programmable delay in the KAT, then a firmware change might be to speed that up if possible. But I doubt that it is possible since it's a relay opening in the KAT which requires some milliseconds. I'm guessing the only Elecraft solution is to delay the amp's response to the high SWR so it doesn't Fault giving the KAT time to open the key line. So the change in firmware we are waiting on is for the KPA amp. Help me if I'm missing something here. - Chuck, KE9UW -- View this message in context: http://elecraft.365791.n2.nabble.com/KAT500-Help-with-KeyLine-Interrupt-on-KPA500-Video-tp7566844p7566890.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] Help with KeyLine Interrupt on KPA500 (Video)
I think your analysis is right, and in some cases the ATU cannot break or reconnect the key line while RF is present. We have KPA500 firmware in test that does this. It is on its way to public availability. 73 Merry Xmas Dick, K6KR Dick On Dec 8, 2012, at 4:18, ke9uw c-haw...@illinois.edu wrote: The PTT is generated by the transceiver. The KAT500 passes it thru to the amp unless the KAT is tuning a high SWR. The problem is that the amp goes into fault before the KAT can OPEN the key line. Firmware in the KAT with some delay is not the answer...it's already too slow for the amp. If there is any programmable delay in the KAT, then a firmware change might be to speed that up if possible. But I doubt that it is possible since it's a relay opening in the KAT which requires some milliseconds. I'm guessing the only Elecraft solution is to delay the amp's response to the high SWR so it doesn't Fault giving the KAT time to open the key line. So the change in firmware we are waiting on is for the KPA amp. Help me if I'm missing something here. - Chuck, KE9UW -- View this message in context: http://elecraft.365791.n2.nabble.com/KAT500-Help-with-KeyLine-Interrupt-on-KPA500-Video-tp7566844p7566890.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 __ 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] Help with KeyLine Interrupt on KPA500 (Video)
That's of little help for all of us with non Elecraft Amps. Keith, XE3/K5ENS -- View this message in context: http://elecraft.365791.n2.nabble.com/KAT500-Help-with-KeyLine-Interrupt-on-KPA500-Video-tp7566844p7566905.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
[Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500 (Video)
Hi Guys, I made a video and posted it on youtube to better explain the issue I'm having. Please watch and then reply to it here if you would. Much appreciated http://www.youtube.com/watch?v=QtCPvKKM3_c Chris K6OZY __ 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] Help with KeyLine Interrupt on KPA500 (Video)
I think what happens is KAT500 needs few msec to determine the operating frequency and measure SWR. There is currently no delay between PTT going into KAT500 from the radio and PTT going out into the KPA500. These few msec is enough for KPA500 to switch itself to fault condition. Here programmable PTT delay in KAT500 would be very helpful. Especially so with other makes of the amplifiers. I have discussed it with Elecraft tech support and they say this feature is on their to do list. Lets hope that the next firmware revision of KAT500 will have that feature implemented. 73, Igor UA9CDC - Original Message - From: Chris Johnson elecr...@ozy.us To: Elecraft@mailman.qth.net Sent: Friday, December 07, 2012 3:35 PM Subject: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500 (Video) Hi Guys, I made a video and posted it on youtube to better explain the issue I'm having. Please watch and then reply to it here if you would. Much appreciated http://www.youtube.com/watch?v=QtCPvKKM3_c Chris K6OZY __ 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] Help with KeyLine Interrupt on KPA500 (Video)
Make sure you are only routing the AMP keying line from the rig through the KAT 500 to the amp. The tuner always interrupts this line when it is tuning. This can be done either via the the AMP keying line RCA connectors on the Rig, KAT500 and the AMP, or via the KPAK3AUX cable connections between the K3 and KAT500 and between the KAT500 and the KPA500 when the K3 is used. Some customers have hooked up the AMP keying line to the amp two ways in parallel. One correctly through the KAT500 to the amp (usually via the KPAK3AUX cable), and the other incorrectly via a second path directly from the Rig's Key out RCA connector directly to the amp. This second path will nullify the KAT500's attempt to open the AMP keying line to theMAP during tune. 73, Eric --- www.elecraft.com On 12/7/2012 1:35 AM, Chris Johnson wrote: Hi Guys, I made a video and posted it on youtube to better explain the issue I'm having. Please watch and then reply to it here if you would. Much appreciated http://www.youtube.com/watch?v=QtCPvKKM3_c Chris K6OZY __ 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] Help with KeyLine Interrupt on KPA500 (Video)
It should be noted that the KAT500 does not regenerate the PTT signal, rather it (only) interrupts it (by opening relay contacts). Therefore it can't really delay the initial PTT signal going to the amp... it can only interrupt it as fast as it can, when it detects high VSWR. As Gary mentioned, there is newer KPA500 firmware that alleviates the problem of hard faults when it detects high VSWR before the KAT500 has time to interrupt the keying line, but it appears that that new KPA500 firmware has not been generally released yet. 73, ~iain / N6ML On Fri, Dec 7, 2012 at 4:10 AM, Igor Sokolov ua9...@gmail.com wrote: I think what happens is KAT500 needs few msec to determine the operating frequency and measure SWR. There is currently no delay between PTT going into KAT500 from the radio and PTT going out into the KPA500. These few msec is enough for KPA500 to switch itself to fault condition. Here programmable PTT delay in KAT500 would be very helpful. Especially so with other makes of the amplifiers. I have discussed it with Elecraft tech support and they say this feature is on their to do list. Lets hope that the next firmware revision of KAT500 will have that feature implemented. 73, Igor UA9CDC - Original Message - From: Chris Johnson elecr...@ozy.us To: Elecraft@mailman.qth.net Sent: Friday, December 07, 2012 3:35 PM Subject: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500 (Video) Hi Guys, I made a video and posted it on youtube to better explain the issue I'm having. Please watch and then reply to it here if you would. Much appreciated http://www.youtube.com/watch?v=QtCPvKKM3_c Chris K6OZY __ 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
Re: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500 (Video)
So with the new firmware the KPA500 would tolerate a high VSWR for a few more milliseconds to give the tuner time to interrupt keying? I was thinking of ways to not send a keying line with the K3 when using tune. But this doesn't seem possible with the K3...I take it the PTT is used internally in the K3 or no RF comes out. I deal with turning the KPA to standby now anyway for the MFJ 998 tuner, so I'm used to remembering...but am looking forward to tha KAT500...and if the KPA doesn't mind a little non-hard fault, so much the better. Sent from my iPad Chuck, KE9UW (Jack for BMW motorcycles) On Dec 7, 2012, at 12:31 PM, iain macdonnell - N6ML a...@dseven.org wrote: It should be noted that the KAT500 does not regenerate the PTT signal, rather it (only) interrupts it (by opening relay contacts). Therefore it can't really delay the initial PTT signal going to the amp... it can only interrupt it as fast as it can, when it detects high VSWR. As Gary mentioned, there is newer KPA500 firmware that alleviates the problem of hard faults when it detects high VSWR before the KAT500 has time to interrupt the keying line, but it appears that that new KPA500 firmware has not been generally released yet. 73, ~iain / N6ML On Fri, Dec 7, 2012 at 4:10 AM, Igor Sokolov ua9...@gmail.com wrote: I think what happens is KAT500 needs few msec to determine the operating frequency and measure SWR. There is currently no delay between PTT going into KAT500 from the radio and PTT going out into the KPA500. These few msec is enough for KPA500 to switch itself to fault condition. Here programmable PTT delay in KAT500 would be very helpful. Especially so with other makes of the amplifiers. I have discussed it with Elecraft tech support and they say this feature is on their to do list. Lets hope that the next firmware revision of KAT500 will have that feature implemented. 73, Igor UA9CDC - Original Message - From: Chris Johnson elecr...@ozy.us To: Elecraft@mailman.qth.net Sent: Friday, December 07, 2012 3:35 PM Subject: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500 (Video) Hi Guys, I made a video and posted it on youtube to better explain the issue I'm having. Please watch and then reply to it here if you would. Much appreciated http://www.youtube.com/watch?v=QtCPvKKM3_c Chris K6OZY __ 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 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] Help with KeyLine Interrupt on KPA500 (Video)
Hi Eric, I do not have the AUX cable. As described in the video, I am only using the RCA cable from the Flex 3000 into the KAT500 and then another cable from the KAT500 down to the KPA500. I am not using this with a K3 radio, which in that case, would only use the AUX cable and no RCA Key Line. On Dec 7, 2012, at 11:22 AM, Eric Swartz - WA6HHQ, Elecraft e...@elecraft.com wrote: Make sure you are only routing the AMP keying line from the rig through the KAT 500 to the amp. The tuner always interrupts this line when it is tuning. This can be done either via the the AMP keying line RCA connectors on the Rig, KAT500 and the AMP, or via the KPAK3AUX cable connections between the K3 and KAT500 and between the KAT500 and the KPA500 when the K3 is used. Some customers have hooked up the AMP keying line to the amp two ways in parallel. One correctly through the KAT500 to the amp (usually via the KPAK3AUX cable), and the other incorrectly via a second path directly from the Rig's Key out RCA connector directly to the amp. This second path will nullify the KAT500's attempt to open the AMP keying line to theMAP during tune. 73, Eric --- www.elecraft.com On 12/7/2012 1:35 AM, Chris Johnson wrote: Hi Guys, I made a video and posted it on youtube to better explain the issue I'm having. Please watch and then reply to it here if you would. Much appreciated http://www.youtube.com/watch?v=QtCPvKKM3_c Chris K6OZY __ 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] Help with KeyLine Interrupt on KPA500 (Video)
On Fri, Dec 7, 2012 at 11:00 AM, hawley, charles j jr c-haw...@illinois.edu wrote: So with the new firmware the KPA500 would tolerate a high VSWR for a few more milliseconds to give the tuner time to interrupt keying? Yes. It may still kick in the attenuator temporarily, but it shouldn't hard-fault. I was thinking of ways to not send a keying line with the K3 when using tune. But this doesn't seem possible with the K3...I take it the PTT is used internally in the K3 or no RF comes out. I deal with turning the KPA to standby now anyway for the MFJ 998 tuner, so I'm used to remembering...but am looking forward to tha KAT500...and if the KPA doesn't mind a little non-hard fault, so much the better. I used a MFJ-998 before I got the KAT500 too. I had the KPA500 configured to switch to standby mode on band-change, then I'd transmit a bit to get the MFJ to tune, then put the KPA500 in Operate. I operated the KAT500 that way at first too (during early field-test), but since the firmware for both KAT500 and KPA500 have matured, I've turned off the option to standby-on-band-change on the KPA500, and have been happily QSYing around with no resulting hard faults. 73, ~iain / N6ML On Dec 7, 2012, at 12:31 PM, iain macdonnell - N6ML a...@dseven.org wrote: It should be noted that the KAT500 does not regenerate the PTT signal, rather it (only) interrupts it (by opening relay contacts). Therefore it can't really delay the initial PTT signal going to the amp... it can only interrupt it as fast as it can, when it detects high VSWR. As Gary mentioned, there is newer KPA500 firmware that alleviates the problem of hard faults when it detects high VSWR before the KAT500 has time to interrupt the keying line, but it appears that that new KPA500 firmware has not been generally released yet. 73, ~iain / N6ML On Fri, Dec 7, 2012 at 4:10 AM, Igor Sokolov ua9...@gmail.com wrote: I think what happens is KAT500 needs few msec to determine the operating frequency and measure SWR. There is currently no delay between PTT going into KAT500 from the radio and PTT going out into the KPA500. These few msec is enough for KPA500 to switch itself to fault condition. Here programmable PTT delay in KAT500 would be very helpful. Especially so with other makes of the amplifiers. I have discussed it with Elecraft tech support and they say this feature is on their to do list. Lets hope that the next firmware revision of KAT500 will have that feature implemented. 73, Igor UA9CDC - Original Message - From: Chris Johnson elecr...@ozy.us To: Elecraft@mailman.qth.net Sent: Friday, December 07, 2012 3:35 PM Subject: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500 (Video) Hi Guys, I made a video and posted it on youtube to better explain the issue I'm having. Please watch and then reply to it here if you would. Much appreciated http://www.youtube.com/watch?v=QtCPvKKM3_c Chris K6OZY __ 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 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] Help with KeyLine Interrupt on KPA500 (Video)
That may be cure for KPA500 + KAT500 combo but KAT500 supposed to work with amps of other manufacturers. My conversation with Elecraft tech support led me to believe that some sort of TX delay can be implemented in future firmware release. 73, Igor UA9CDC - Original Message - From: iain macdonnell - N6ML a...@dseven.org To: Igor Sokolov ua9...@gmail.com Cc: Chris Johnson elecr...@ozy.us; Elecraft@mailman.qth.net Sent: Saturday, December 08, 2012 12:31 AM Subject: Re: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500 (Video) It should be noted that the KAT500 does not regenerate the PTT signal, rather it (only) interrupts it (by opening relay contacts). Therefore it can't really delay the initial PTT signal going to the amp... it can only interrupt it as fast as it can, when it detects high VSWR. As Gary mentioned, there is newer KPA500 firmware that alleviates the problem of hard faults when it detects high VSWR before the KAT500 has time to interrupt the keying line, but it appears that that new KPA500 firmware has not been generally released yet. 73, ~iain / N6ML On Fri, Dec 7, 2012 at 4:10 AM, Igor Sokolov ua9...@gmail.com wrote: I think what happens is KAT500 needs few msec to determine the operating frequency and measure SWR. There is currently no delay between PTT going into KAT500 from the radio and PTT going out into the KPA500. These few msec is enough for KPA500 to switch itself to fault condition. Here programmable PTT delay in KAT500 would be very helpful. Especially so with other makes of the amplifiers. I have discussed it with Elecraft tech support and they say this feature is on their to do list. Lets hope that the next firmware revision of KAT500 will have that feature implemented. 73, Igor UA9CDC - Original Message - From: Chris Johnson elecr...@ozy.us To: Elecraft@mailman.qth.net Sent: Friday, December 07, 2012 3:35 PM Subject: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500 (Video) Hi Guys, I made a video and posted it on youtube to better explain the issue I'm having. Please watch and then reply to it here if you would. Much appreciated http://www.youtube.com/watch?v=QtCPvKKM3_c Chris K6OZY __ 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
Re: [Elecraft] [KAT500] Help with KeyLine Interrupt on KPA500 (Video)
Hello Chris, Your video shows what I am experiencing also. Firmware v.1.15 seems to have been distributed to field testers to deal with the key line problem. So far v.1.11 is all that is available to us at this time. Roy Morris W4WFB __ 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
