Re: [Flexradio] FLEX5K Drops Amplifier
I can confirm this happens with my Flex 5K, and Alpha 99, using current release version of PowerSDR. It is difficult to get a stable situation, even as low as 10 watts out on the Flex to safely drive the amp on SSB. Kim K4ATX On Mar 3, 2011, at 8:35 PM, Jeff Anderson wrote: Hi Gerald, From my own experiments, I'm not convinced that it's a problem with the ALC algorithm itself (i.e. that it isn't ALC overshoot), but rather with the placement of the ALC algorithm within the code. With stock code, my measurements show that severe TX overshooting can occur, and it seems to depend upon the type of waveform used for testing. Of course, it's always possible that I made a mistake in my measurements, so if anyone would like to replicate my tests, please do! The testing procedure is simple and straightforward, and I describe it in my blog posting at http://k6jca.blogspot.com/ . All one needs is a scope and some way to monitor one's RF signal with it. (One item I forgot to mention in my blog post was TX bandwidth. I no longer recall what it was for my testing, but 3.8KHz is probably in the ballpark . If anyone is going to try to repeat my tests, it might be worthwhile to experiment with TX bandwidth (both low-cutoff as well as high-cutoff) to see if/how bandwidth affects TX overshoot). Best regards, - Jeff, k6jca Gerald Youngblood wrote: Steve et. al. Well, I am going learn not to propose a public hypothesis based on reading an email. ;) After testing in the lab, there is no glitch whatsoever when switching Tune on and off. I set the spectrum analyzer to 0 Hz span, which makes it able to catch the power of real time glitches. There were none at all. It was perfect. Please disregard my earlier speculation as to the faster TR times causing a problem with spikes on the transmitter. I was simply wrong. However, we will definitely look further into the ALC overshoot reports. I did some initial measurements but they are inconclusive so far. Regards, Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: ger...@flexradio.com Web: www.flexradio.com http://www.flex-radio.com/ Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
Steve, et. al. We significantly decreased TR transition times in firmware in order to deliver the major CW timing improvements in 2.0.19 RC1. It sounds like we need to take another look to see if that speed improvement is causing a transition glitch on voice modes. I will meet with the engineering team to discuss a test and resolution methodology. We will probably want to get a small group of testers to help get to the bottom of the problem without taking up too much reflector bandwidth. If you or others who have good test setups would like to help, please send me a private email. Thanks, Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: ger...@flexradio.com Web: www.flexradio.com http://www.flex-radio.com/ Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems On Wed, Mar 2, 2011 at 3:37 PM, Steve Tripp (K1IIG-1) stephen.tr...@snet.net wrote: Using my FK5 has frequently causes my Acom2000a to false off. It first occurred when running 1000w in USB but now is happening more frequently with USB carefully adjusted so ALC never peaks 0 dbm and the same with the leveler. I can easily duplicate this problem when in the tune position, whereby the amp ALWAYS drops out when tune drive power is 25w or more and even when tune power is down to 10w. I normally have the tune set to 10w. Please note, I have NEVER dropped the amp using CW driving the ACOM to full 1500w with harsh testing. None of my other transceivers, including my PRO3, have ever caused the amp to drop out in any mode. Because the amp consistently drops out when releasing the tune, I wonder if the Flex is sending a full power spike to the amp causing a drop out. The amp NEVER dropping out in CW confuses the issue. Finally, I have had a 3000 and now the 5000 e/w V/U and never experienced this or other problems while the 3000 was running version 1.18. I am not convinced the Flex 5000 is a reliable radio. This is my first post and do not consider myself a whiner but indeed I have struggled with the Flex 5000. Steve K1IIG ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
Easy Ssb peaks equal never exceed the drive setting. If drive is set to 40 watts Ssb peak setting reaches but never exceeds 40 watts. Easy experiment in test section set To 40 watts engage two tone it will be above 40. It may surprise you how much. If using Compression note the difference between CPDR DX. Sent from the land of OZ On Mar 3, 2011, at 9:20 AM, Gerald Youngblood ger...@flexradio.com wrote: Steve, et. al. We significantly decreased TR transition times in firmware in order to deliver the major CW timing improvements in 2.0.19 RC1. It sounds like we need to take another look to see if that speed improvement is causing a transition glitch on voice modes. I will meet with the engineering team to discuss a test and resolution methodology. We will probably want to get a small group of testers to help get to the bottom of the problem without taking up too much reflector bandwidth. If you or others who have good test setups would like to help, please send me a private email. Thanks, Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: ger...@flexradio.com Web: www.flexradio.com http://www.flex-radio.com/ Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems On Wed, Mar 2, 2011 at 3:37 PM, Steve Tripp (K1IIG-1) stephen.tr...@snet.net wrote: Using my FK5 has frequently causes my Acom2000a to false off. It first occurred when running 1000w in USB but now is happening more frequently with USB carefully adjusted so ALC never peaks 0 dbm and the same with the leveler. I can easily duplicate this problem when in the tune position, whereby the amp ALWAYS drops out when tune drive power is 25w or more and even when tune power is down to 10w. I normally have the tune set to 10w. Please note, I have NEVER dropped the amp using CW driving the ACOM to full 1500w with harsh testing. None of my other transceivers, including my PRO3, have ever caused the amp to drop out in any mode. Because the amp consistently drops out when releasing the tune, I wonder if the Flex is sending a full power spike to the amp causing a drop out. The amp NEVER dropping out in CW confuses the issue. Finally, I have had a 3000 and now the 5000 e/w V/U and never experienced this or other problems while the 3000 was running version 1.18. I am not convinced the Flex 5000 is a reliable radio. This is my first post and do not consider myself a whiner but indeed I have struggled with the Flex 5000. Steve K1IIG ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
CPDR on, and set to 1, is very light compression. It is IMPOSSIBLE for it to overshoot. If there is overshoot with that on, it is a hardware spike. I suggest an experiment with CPDR on, set to 1, to see if the ACOM stops tripping. This would isolate it to the DSP sections working on the digital version of the signal. Bob N4HY On Thu, Mar 3, 2011 at 9:02 AM, Jim pywac...@insightbb.com wrote: Easy Ssb peaks equal never exceed the drive setting. If drive is set to 40 watts Ssb peak setting reaches but never exceeds 40 watts. Easy experiment in test section set To 40 watts engage two tone it will be above 40. It may surprise you how much. If using Compression note the difference between CPDR DX. Sent from the land of OZ On Mar 3, 2011, at 9:20 AM, Gerald Youngblood ger...@flexradio.com wrote: Steve, et. al. We significantly decreased TR transition times in firmware in order to deliver the major CW timing improvements in 2.0.19 RC1. It sounds like we need to take another look to see if that speed improvement is causing a transition glitch on voice modes. I will meet with the engineering team to discuss a test and resolution methodology. We will probably want to get a small group of testers to help get to the bottom of the problem without taking up too much reflector bandwidth. If you or others who have good test setups would like to help, please send me a private email. Thanks, Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: ger...@flexradio.com Web: www.flexradio.com http://www.flex-radio.com/ Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems On Wed, Mar 2, 2011 at 3:37 PM, Steve Tripp (K1IIG-1) stephen.tr...@snet.net wrote: Using my FK5 has frequently causes my Acom2000a to false off. It first occurred when running 1000w in USB but now is happening more frequently with USB carefully adjusted so ALC never peaks 0 dbm and the same with the leveler. I can easily duplicate this problem when in the tune position, whereby the amp ALWAYS drops out when tune drive power is 25w or more and even when tune power is down to 10w. I normally have the tune set to 10w. Please note, I have NEVER dropped the amp using CW driving the ACOM to full 1500w with harsh testing. None of my other transceivers, including my PRO3, have ever caused the amp to drop out in any mode. Because the amp consistently drops out when releasing the tune, I wonder if the Flex is sending a full power spike to the amp causing a drop out. The amp NEVER dropping out in CW confuses the issue. Finally, I have had a 3000 and now the 5000 e/w V/U and never experienced this or other problems while the 3000 was running version 1.18. I am not convinced the Flex 5000 is a reliable radio. This is my first post and do not consider myself a whiner but indeed I have struggled with the Flex 5000. Steve K1IIG ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
Steve et. al. Well, I am going learn not to propose a public hypothesis based on reading an email. ;) After testing in the lab, there is no glitch whatsoever when switching Tune on and off. I set the spectrum analyzer to 0 Hz span, which makes it able to catch the power of real time glitches. There were none at all. It was perfect. Please disregard my earlier speculation as to the faster TR times causing a problem with spikes on the transmitter. I was simply wrong. However, we will definitely look further into the ALC overshoot reports. I did some initial measurements but they are inconclusive so far. Regards, Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: ger...@flexradio.com Web: www.flexradio.com http://www.flex-radio.com/ Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems On Thu, Mar 3, 2011 at 8:20 AM, Gerald Youngblood ger...@flexradio.comwrote: Steve, et. al. We significantly decreased TR transition times in firmware in order to deliver the major CW timing improvements in 2.0.19 RC1. It sounds like we need to take another look to see if that speed improvement is causing a transition glitch on voice modes. I will meet with the engineering team to discuss a test and resolution methodology. We will probably want to get a small group of testers to help get to the bottom of the problem without taking up too much reflector bandwidth. If you or others who have good test setups would like to help, please send me a private email. Thanks, Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: ger...@flexradio.com Web: www.flexradio.com http://www.flex-radio.com/ Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems On Wed, Mar 2, 2011 at 3:37 PM, Steve Tripp (K1IIG-1) stephen.tr...@snet.net wrote: Using my FK5 has frequently causes my Acom2000a to false off. It first occurred when running 1000w in USB but now is happening more frequently with USB carefully adjusted so ALC never peaks 0 dbm and the same with the leveler. I can easily duplicate this problem when in the tune position, whereby the amp ALWAYS drops out when tune drive power is 25w or more and even when tune power is down to 10w. I normally have the tune set to 10w. Please note, I have NEVER dropped the amp using CW driving the ACOM to full 1500w with harsh testing. None of my other transceivers, including my PRO3, have ever caused the amp to drop out in any mode. Because the amp consistently drops out when releasing the tune, I wonder if the Flex is sending a full power spike to the amp causing a drop out. The amp NEVER dropping out in CW confuses the issue. Finally, I have had a 3000 and now the 5000 e/w V/U and never experienced this or other problems while the 3000 was running version 1.18. I am not convinced the Flex 5000 is a reliable radio. This is my first post and do not consider myself a whiner but indeed I have struggled with the Flex 5000. Steve K1IIG ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
Steve, See below. Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: ger...@flexradio.com Web: www.flexradio.com http://www.flex-radio.com/ Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems On Thu, Mar 3, 2011 at 9:02 AM, Jim pywac...@insightbb.com wrote: Easy Ssb peaks equal never exceed the drive setting. If drive is set to 40 watts Ssb peak setting reaches but never exceeds 40 watts. I am not sure I understand what you are talking about here. What is Easy Ssb Easy experiment in test section set To 40 watts engage two tone it will be above 40. It may surprise you how much. If using Compression note the difference between CPDR DX. This sounds perfectly normal. PEP will be 6 dB above the single tone level on two tone testing. Sent from the land of OZ On Mar 3, 2011, at 9:20 AM, Gerald Youngblood ger...@flexradio.com wrote: Steve, et. al. We significantly decreased TR transition times in firmware in order to deliver the major CW timing improvements in 2.0.19 RC1. It sounds like we need to take another look to see if that speed improvement is causing a transition glitch on voice modes. I will meet with the engineering team to discuss a test and resolution methodology. We will probably want to get a small group of testers to help get to the bottom of the problem without taking up too much reflector bandwidth. If you or others who have good test setups would like to help, please send me a private email. Thanks, Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: ger...@flexradio.com Web: www.flexradio.com http://www.flex-radio.com/ Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems On Wed, Mar 2, 2011 at 3:37 PM, Steve Tripp (K1IIG-1) stephen.tr...@snet.net wrote: Using my FK5 has frequently causes my Acom2000a to false off. It first occurred when running 1000w in USB but now is happening more frequently with USB carefully adjusted so ALC never peaks 0 dbm and the same with the leveler. I can easily duplicate this problem when in the tune position, whereby the amp ALWAYS drops out when tune drive power is 25w or more and even when tune power is down to 10w. I normally have the tune set to 10w. Please note, I have NEVER dropped the amp using CW driving the ACOM to full 1500w with harsh testing. None of my other transceivers, including my PRO3, have ever caused the amp to drop out in any mode. Because the amp consistently drops out when releasing the tune, I wonder if the Flex is sending a full power spike to the amp causing a drop out. The amp NEVER dropping out in CW confuses the issue. Finally, I have had a 3000 and now the 5000 e/w V/U and never experienced this or other problems while the 3000 was running version 1.18. I am not convinced the Flex 5000 is a reliable radio. This is my first post and do not consider myself a whiner but indeed I have struggled with the Flex 5000. Steve K1IIG ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
I was trying to say it's easy to check so a comma needed to be after the word or I could have said it's easy, I know on my K3 or Icom 7600 if I set my drive in RTTY to 45 watts (45 watts is what it takes to drive my 2000A to around 1500) key down I will see approx 1500 watts out then push the SSB button to go to SSB and begin talking I will see again approx 1500 watts out...no overshoot or spikes. It doesn't work this way on the 5K ...I set the drive to 45 watts key down a carrier to ensure it's 45 watts and yes it is..go to SSB and start talking and wow! overshoot like crazy several times from key to unkey. 1600, 1800 etc KE4WY JIM d Sent: Thursday, March 03, 2011 6:53 PM. To: Jim Cc: Steve Tripp (K1IIG-1) ; flexradio@flex-radio.biz Subject: Re: [Flexradio] FLEX5K Drops Amplifier Steve, See below. Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: ger...@flexradio.com Web: www.flexradio.com Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems On Thu, Mar 3, 2011 at 9:02 AM, Jim pywac...@insightbb.com wrote: Easy Ssb peaks equal never exceed the drive setting. If drive is set to 40 watts Ssb peak setting reaches but never exceeds 40 watts. I am not sure I understand what you are talking about here. What is Easy Ssb Easy experiment in test section set To 40 watts engage two tone it will be above 40. It may surprise you how much. If using Compression note the difference between CPDR DX. This sounds perfectly normal. PEP will be 6 dB above the single tone level on two tone testing. Sent from the land of OZ On Mar 3, 2011, at 9:20 AM, Gerald Youngblood ger...@flexradio.com wrote: Steve, et. al. We significantly decreased TR transition times in firmware in order to deliver the major CW timing improvements in 2.0.19 RC1. It sounds like we need to take another look to see if that speed improvement is causing a transition glitch on voice modes. I will meet with the engineering team to discuss a test and resolution methodology. We will probably want to get a small group of testers to help get to the bottom of the problem without taking up too much reflector bandwidth. If you or others who have good test setups would like to help, please send me a private email. Thanks, Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: ger...@flexradio.com Web: www.flexradio.com http://www.flex-radio.com/ Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems On Wed, Mar 2, 2011 at 3:37 PM, Steve Tripp (K1IIG-1) stephen.tr...@snet.net wrote: Using my FK5 has frequently causes my Acom2000a to false off. It first occurred when running 1000w in USB but now is happening more frequently with USB carefully adjusted so ALC never peaks 0 dbm and the same with the leveler. I can easily duplicate this problem when in the tune position, whereby the amp ALWAYS drops out when tune drive power is 25w or more and even when tune power is down to 10w. I normally have the tune set to 10w. Please note, I have NEVER dropped the amp using CW driving the ACOM to full 1500w with harsh testing. None of my other transceivers, including my PRO3, have ever caused the amp to drop out in any mode. Because the amp consistently drops out when releasing the tune, I wonder if the Flex is sending a full power spike to the amp causing a drop out. The amp NEVER dropping out in CW confuses the issue. Finally, I have had a 3000 and now the 5000 e/w V/U and never experienced this or other problems while the 3000 was running version 1.18. I am not convinced the Flex 5000 is a reliable radio. This is my first post and do not consider myself a whiner but indeed I have struggled with the Flex 5000. Steve K1IIG ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com
Re: [Flexradio] FLEX5K Drops Amplifier
What we've got here...is (a) failure to communicate ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
On Thu, Mar 3, 2011 at 4:31 PM, Ross Stenberg ross.stenb...@charter.netwrote: What we've got here...is (a) failure to communicate Perhaps. I certainly see what everyone is saying and everyone is right. It all depends on what you are looking for. Clearly there needs to be a limiter function with fast attack and reduction in gain to keep peaks from exceeding the setpoint. Bob McGwier stated that the compander function set to one would function as a peak limiter. OTOH it seems to me that the ALC module in PSDR should do the same thing all the time independent of any other settings. Gerald suggested that the peak level of a two-tone test should be +6dB relative to the peak with either tone and that makes sense since the algebraic sum of the two waves will have a peak voltage 2x the average (RMS) voltage. You know, it seems to me that the ALC module should have a clear, I am limiting, indication and should have a clear 0dB output setting that is not dependent on any other gain setting -- Brian Lloyd, WB6RQN/J79BPL 3191 Western Dr. Cameron Park, CA 95682 br...@lloyd.com +1.767.617.1365 (Dominica) +1.931.492.6776 (USA) (+1.931.4.WB6RQN) ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
Hi Gerald, From my own experiments, I'm not convinced that it's a problem with the ALC algorithm itself (i.e. that it isn't ALC overshoot), but rather with the placement of the ALC algorithm within the code. With stock code, my measurements show that severe TX overshooting can occur, and it seems to depend upon the type of waveform used for testing. Of course, it's always possible that I made a mistake in my measurements, so if anyone would like to replicate my tests, please do! The testing procedure is simple and straightforward, and I describe it in my blog posting at http://k6jca.blogspot.com/ . All one needs is a scope and some way to monitor one's RF signal with it. (One item I forgot to mention in my blog post was TX bandwidth. I no longer recall what it was for my testing, but 3.8KHz is probably in the ballpark . If anyone is going to try to repeat my tests, it might be worthwhile to experiment with TX bandwidth (both low-cutoff as well as high-cutoff) to see if/how bandwidth affects TX overshoot). Best regards, - Jeff, k6jca Gerald Youngblood wrote: Steve et. al. Well, I am going learn not to propose a public hypothesis based on reading an email. ;) After testing in the lab, there is no glitch whatsoever when switching Tune on and off. I set the spectrum analyzer to 0 Hz span, which makes it able to catch the power of real time glitches. There were none at all. It was perfect. Please disregard my earlier speculation as to the faster TR times causing a problem with spikes on the transmitter. I was simply wrong. However, we will definitely look further into the ALC overshoot reports. I did some initial measurements but they are inconclusive so far. Regards, Gerald Gerald Youngblood, K5SDR President and CEO FlexRadio Systems(TM) 13091 Pond Springs Road, #250 Austin, TX 78729 Phone: 512-535-4713 Ext. 202 Email: ger...@flexradio.com Web: www.flexradio.com http://www.flex-radio.com/ Tune In Excitement (TM) PowerSDR(TM) is a trademark of FlexRadio Systems ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
I can attest to Steve's credibility and observation. I have not had my 2000a on line for 6+ months and just hooked everything back up this weekend. It will trip with 25 watts, cw, psk, etc. I do not know if there is a spike in the key up or key down but I would suspect the latter based on what I see when it trips. 73 On Wed, Mar 2, 2011 at 4:37 PM, Steve Tripp (K1IIG-1) stephen.tr...@snet.net wrote: Using my FK5 has frequently causes my Acom2000a to false off. It first occurred when running 1000w in USB but now is happening more frequently with USB carefully adjusted so ALC never peaks 0 dbm and the same with the leveler. I can easily duplicate this problem when in the tune position, whereby the amp ALWAYS drops out when tune drive power is 25w or more and even when tune power is down to 10w. I normally have the tune set to 10w. Please note, I have NEVER dropped the amp using CW driving the ACOM to full 1500w with harsh testing. None of my other transceivers, including my PRO3, have ever caused the amp to drop out in any mode. Because the amp consistently drops out when releasing the tune, I wonder if the Flex is sending a full power spike to the amp causing a drop out. The amp NEVER dropping out in CW confuses the issue. Finally, I have had a 3000 and now the 5000 e/w V/U and never experienced this or other problems while the 3000 was running version 1.18. I am not convinced the Flex 5000 is a reliable radio. This is my first post and do not consider myself a whiner but indeed I have struggled with the Flex 5000. Steve K1IIG ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
Connect an RF sensor(connected to a fast scope) to the cable between the 5000 and the Acom and see if you can catch it in action. Pete, wa2cwa On Wed, 2 Mar 2011 17:04:21 -0500 Neal Campbell abrohamn...@gmail.com writes: I can attest to Steve's credibility and observation. I have not had my 2000a on line for 6+ months and just hooked everything back up this weekend. It will trip with 25 watts, cw, psk, etc. I do not know if there is a spike in the key up or key down but I would suspect the latter based on what I see when it trips. 73 On Wed, Mar 2, 2011 at 4:37 PM, Steve Tripp (K1IIG-1) stephen.tr...@snet.net wrote: Using my FK5 has frequently causes my Acom2000a to false off. It first occurred when running 1000w in USB but now is happening more frequently with USB carefully adjusted so ALC never peaks 0 dbm and the same with the leveler. I can easily duplicate this problem when in the tune position, whereby the amp ALWAYS drops out when tune drive power is 25w or more and even when tune power is down to 10w. I normally have the tune set to 10w. Please note, I have NEVER dropped the amp using CW driving the ACOM to full 1500w with harsh testing. None of my other transceivers, including my PRO3, have ever caused the amp to drop out in any mode. Because the amp consistently drops out when releasing the tune, I wonder if the Flex is sending a full power spike to the amp causing a drop out. The amp NEVER dropping out in CW confuses the issue. Finally, I have had a 3000 and now the 5000 e/w V/U and never experienced this or other problems while the 3000 was running version 1.18. I am not convinced the Flex 5000 is a reliable radio. This is my first post and do not consider myself a whiner but indeed I have struggled with the Flex 5000. Steve K1IIG ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
On Wed, Mar 2, 2011 at 2:51 PM, manual...@juno.com wrote: Connect an RF sensor(connected to a fast scope) to the cable between the 5000 and the Acom and see if you can catch it in action. I have a station monitor. Right now I have it attached to the 3000 at school but can bring it home and check out the 5000 tonight. -- Brian Lloyd, WB6RQN/J79BPL 3191 Western Dr. Cameron Park, CA 95682 br...@lloyd.com +1.767.617.1365 (Dominica) +1.931.492.6776 (USA) (+1.931.4.WB6RQN) ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
A fast Storage Scope would be better, the pulse, which only occurs when the T/R circuit is activated, would be quite fast. 73, Dick, W1KSZ -Original Message- From: Brian Lloyd brian-wb6...@lloyd.com Sent: Mar 2, 2011 4:23 PM To: manual...@juno.com Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] FLEX5K Drops Amplifier On Wed, Mar 2, 2011 at 2:51 PM, manual...@juno.com wrote: Connect an RF sensor(connected to a fast scope) to the cable between the 5000 and the Acom and see if you can catch it in action. I have a station monitor. Right now I have it attached to the 3000 at school but can bring it home and check out the 5000 tonight. -- Brian Lloyd, WB6RQN/J79BPL 3191 Western Dr. Cameron Park, CA 95682 br...@lloyd.com +1.767.617.1365 (Dominica) +1.931.492.6776 (USA) (+1.931.4.WB6RQN) ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
It might possibly show up on the scope function of the panadaptor panel. Several of us had a pulse affecting RTTY tx a few versions back, and it showed clearly on the 5000a scope function. Jerry W4UK At 07:32 PM 3/2/2011, Richard W. Solomon wrote: A fast Storage Scope would be better, the pulse, which only occurs when the T/R circuit is activated, would be quite fast. 73, Dick, W1KSZ -Original Message- From: Brian Lloyd brian-wb6...@lloyd.com Sent: Mar 2, 2011 4:23 PM To: manual...@juno.com Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] FLEX5K Drops Amplifier On Wed, Mar 2, 2011 at 2:51 PM, manual...@juno.com wrote: Connect an RF sensor(connected to a fast scope) to the cable between the 5000 and the Acom and see if you can catch it in action. I have a station monitor. Right now I have it attached to the 3000 at school but can bring it home and check out the 5000 tonight. -- Brian Lloyd, WB6RQN/J79BPL 3191 Western Dr. Cameron Park, CA 95682 br...@lloyd.com +1.767.617.1365 (Dominica) +1.931.492.6776 (USA) (+1.931.4.WB6RQN) ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
One of my favorite transceivers was the ICOM IC-781. It had a spike of 150 watts before the ALC took over. Quite a few low drive amps died due to this problem. ICOMs answer was That is the way it works. The users of this rig figured out the problem and corrected it. It required swapping a couple of resistors and changing a couple of capacitors. This in a $6,000 transceiver in 1988. Isn't it great to turn in a bug report instead of searching schematics? 73, Barry KD5VC --Original Message-- From: Richard W. Solomon To: flexradio@flex-radio.biz ReplyTo: Richard W. Solomon Subject: Re: [Flexradio] FLEX5K Drops Amplifier Sent: Mar 2, 2011 6:32 PM A fast Storage Scope would be better, the pulse, which only occurs when the T/R circuit is activated, would be quite fast. 73, Dick, W1KSZ -Original Message- From: Brian Lloyd brian-wb6...@lloyd.com Sent: Mar 2, 2011 4:23 PM To: manual...@juno.com Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] FLEX5K Drops Amplifier On Wed, Mar 2, 2011 at 2:51 PM, manual...@juno.com wrote: Connect an RF sensor(connected to a fast scope) to the cable between the 5000 and the Acom and see if you can catch it in action. I have a station monitor. Right now I have it attached to the 3000 at school but can bring it home and check out the 5000 tonight. -- Brian Lloyd, WB6RQN/J79BPL 3191 Western Dr. Cameron Park, CA 95682 br...@lloyd.com +1.767.617.1365 (Dominica) +1.931.492.6776 (USA) (+1.931.4.WB6RQN) ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
On Wed, Mar 2, 2011 at 4:32 PM, Richard W. Solomon w1...@earthlink.netwrote: A fast Storage Scope would be better, the pulse, which only occurs when the T/R circuit is activated, would be quite fast. I was planning to use a microcontroller to key and unkey the rig repeatedly so I have a repetitive waveform to look at on the 'scope. But you are right that a DSO would be nice. Now I am lusting after a mixed-signal oscilloscope. -- Brian Lloyd, WB6RQN/J79BPL 3191 Western Dr. Cameron Park, CA 95682 br...@lloyd.com +1.767.617.1365 (Dominica) +1.931.492.6776 (USA) (+1.931.4.WB6RQN) ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
Re: [Flexradio] FLEX5K Drops Amplifier
This is more like an ALC overshoot than a keying spike like in the IC-781 Especially noted when using a low drive Amp and several spikes will be noted from key to unkey while in SSB. I have noticed it since owning a 5K since 2008 almost 3 years; However have seen it improved since intro of Beta 1.19 beta thru 2.0.19 Rc1 But it's still there. KE4WY Jim Sent from the land of OZ On Mar 2, 2011, at 9:21 PM, Williams, Barry barry.willi...@nov.com wrote: One of my favorite transceivers was the ICOM IC-781. It had a spike of 150 watts before the ALC took over. Quite a few low drive amps died due to this problem. ICOMs answer was That is the way it works. The users of this rig figured out the problem and corrected it. It required swapping a couple of resistors and changing a couple of capacitors. This in a $6,000 transceiver in 1988. Isn't it great to turn in a bug report instead of searching schematics? 73, Barry KD5VC --Original Message-- From: Richard W. Solomon To: flexradio@flex-radio.biz ReplyTo: Richard W. Solomon Subject: Re: [Flexradio] FLEX5K Drops Amplifier Sent: Mar 2, 2011 6:32 PM A fast Storage Scope would be better, the pulse, which only occurs when the T/R circuit is activated, would be quite fast. 73, Dick, W1KSZ -Original Message- From: Brian Lloyd brian-wb6...@lloyd.com Sent: Mar 2, 2011 4:23 PM To: manual...@juno.com Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] FLEX5K Drops Amplifier On Wed, Mar 2, 2011 at 2:51 PM, manual...@juno.com wrote: Connect an RF sensor(connected to a fast scope) to the cable between the 5000 and the Acom and see if you can catch it in action. I have a station monitor. Right now I have it attached to the 3000 at school but can bring it home and check out the 5000 tonight. -- Brian Lloyd, WB6RQN/J79BPL 3191 Western Dr. Cameron Park, CA 95682 br...@lloyd.com +1.767.617.1365 (Dominica) +1.931.492.6776 (USA) (+1.931.4.WB6RQN) ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ ___ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
