Re: [Flexradio] Flex 3K and 5K software shut down QRO.
Steven, I probably should have qualified my statement with In my experience As someone else pointed out, EVERY installation is different reacts differently to the various cures for RF feedback. That being said, I will say that yours is the ONLY occurrence that I have heard of where the Granite Digital cable actually made the situation worse instead of helping. 73, Ray, K9DUR http://k9dur.info ___ 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] Flex 3K and 5K software shut down QRO.
I had to point out a contrary instance. The kicker is I am using the Granite firewire cable now my SDR computer is not attached to the station ground system without problems. I don't recommend this practice however. The stock Firewire cable Flex ships with the radio is pretty darned good with only ferrite at one end. On Tue, Sep 13, 2011 at 5:42 AM, Ray, K9DUR k9...@rnacs.com wrote: Steven, I probably should have qualified my statement with In my experience As someone else pointed out, EVERY installation is different reacts differently to the various cures for RF feedback. That being said, I will say that yours is the ONLY occurrence that I have heard of where the Granite Digital cable actually made the situation worse instead of helping. 73, Ray, K9DUR http://k9dur.info -- Steven L Hess ARS KC6KGE DM05gd22 Skype user flamebait Cell 661 487 0357 (Facetime) Google Voice 661 769 6201 openSUSE Linux 11.3 and 11.4 ___ 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] Flex 3K and 5K software shut down QRO.
All right, back to history. In that period before time began and the only Flex radio was the 1000 and we still had (but didn't know it) another three or four months before the 5000A would begin ordinary shipping there was much discussion on the reflector on various topics: all speculation and mostly forgotten today. For example, at one point the equalizers had not been mentioned as a part of PowerSDR but thought to be recommended and thus there is now such a separate box in my shack that has never been connected. And then there was the discussion on the supply voltage accuracy needed by this marvelous rig and since one opinion was given that plus one tenth and minus two tenths from 13.8 would be a good idea you will now find a one farad capacitor in my system. Now, when it came to this strange new fire wire thing that no one knew anything about the discussion included admonishment to avoid cheap cables. And I think I was among the first to find this Granite Digital doubly shielded cable on line and since it also cost an arm and a leg I thought it must be good and purchased it---several months before the radio arrived at the door and I also told John Basilotto that I had found this marvelous product and the next thing I knew it was being recommended. I have used it since day one and have not had any RFI but I will say that there is very little distance between the radio and computer (two feet). Of course, by the time the 3000 was in the pipeline there had been enough complaints and Flex had started to ship their cable with the radio and that is what I use with the 3000. Again, no RFI problems but the computer-radio distance is short and I do believe in grounding as best I can. And I do continue to feel guilty that I have these exciting radios that others don't have for reasons of price or ignorance. 73 Lee K9WRU - Original Message - From: Steven Hess flameb...@gmail.com To: FlexRadio@flex-radio.biz Sent: Tuesday, September 13, 2011 6:58 AM Subject: Re: [Flexradio] Flex 3K and 5K software shut down QRO. I had to point out a contrary instance. The kicker is I am using the Granite firewire cable now my SDR computer is not attached to the station ground system without problems. I don't recommend this practice however. The stock Firewire cable Flex ships with the radio is pretty darned good with only ferrite at one end. On Tue, Sep 13, 2011 at 5:42 AM, Ray, K9DUR k9...@rnacs.com wrote: Steven, I probably should have qualified my statement with In my experience As someone else pointed out, EVERY installation is different reacts differently to the various cures for RF feedback. That being said, I will say that yours is the ONLY occurrence that I have heard of where the Granite Digital cable actually made the situation worse instead of helping. 73, Ray, K9DUR http://k9dur.info -- Steven L Hess ARS KC6KGE DM05gd22 Skype user flamebait Cell 661 487 0357 (Facetime) Google Voice 661 769 6201 openSUSE Linux 11.3 and 11.4 ___ 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] Flex 3K and 5K software shut down QRO
On Tue, Sep 13, 2011 at 4:42 AM, Chris ctsee...@cox.net wrote: My shack is on the second floor... == When attacking RF-in-the-shack problems, ferrites are the second level of defense. The first thing to do is to get rid of as much as possible at its source, viz. common mode currents on the feedline. Even if your shack is on the first floor, grounding rods are likely to be of little or no use for RF. The key to an RF ground is a counterpoise system. This does not have to be fancy. A few wires of various lengths will usually do. My second-floor shack has three wires that run out the window and lie along the garage roof. One is in the garage's rain gutter and presumably couples some RF into that. My antenna is an end-fed long wire that comes right into the shack. It goes to the hot side of a 4:1 Unun, and the counterpoise wires go to the cold side. After the Unun, there is an RF isolator from Radio Works (it's really just a choke balun sold under a different name). Then a short length of coax goes across the room to my rig. When I first set up the rig, I had RFI distortion in my audio on certain frequencies, and I attacked it with ferrites. But later when I made a nice solid star-system ground lashup for all the gear on the operating table, the RFI went away with no need for the ferrites, and I'm able to run 500 watts on all bands with no problem. I like the Radio Works line isolators, and in addition to the one at the antenna, there's one between transceiver and amplifier. Here's a link to a Unun page: http://www.iv3sbe.webfundis.net/html/UNUN.htm It's the same as a 4:1 balun except a couple of connections are swapped. I built mine from an Amidon balun kit. If the problem is confined to single band, it's surely common mode RF -- choke it off at its source, and you'll need few or no ferrites. 73, Tony KT0NY -- http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352 ___ 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] Flex 3K and 5K software shut down QRO
I have been holding off to weigh in here on this discussion and now I feel the need. First, I am going to blaspheme and tell you that grounding doesn't matter. That's right, you heard me -- grounding doesn't matter ... at the radios. In fact, it is entirely possible that grounding will exacerbate the problem! The real problem is that the different components in your shack are at different RF potentials and if you connect them with conductors, RF currents will traverse those conductors. This is why chokes help the problem: they introduce impedance to the RF currents flowing on the outsides of conductors. What IS important is *bonding*. We want very short (much less than 1/10 wavelength), low-impedance connections between components. We want them all at the same RF potential. If they are, RF currents won't flow between them. And what RF currents do flow, we want them to flow over the bonding straps, not flowing over the signal cables. Make the signal cables high-impedance (with chokes) to the RF. So why do people find that a good ground at the radios helps things? It is because, in their attempt to create a good ground they have actually created a good BOND between the components, and that IS useful. So, if you really want to solve the problems, try the following: 1. Create a proper entry for your antenna cables entering the building. In the case of coax this is a ground-plate with a very short ground cable to a good RF and protective ground (not necessarily the same thing) at the entry to the building. Your lightning arrestors are mounted to this plate too. Each coax cable connects to a lightning arrester that is mounted directly to the ground plate. This ensures that the coax shield is at RF ground potential where the coax enters your building. BTW, do this at the base of the antenna too if the base of the antenna and the entrance of the building are separated by more than a few feet. 2. Place common mode chokes both before and after this ground plate. 3. Dispense with the RF ground at the shack itself unless you can make that ground be 1/10 wave or less. BTW, 1/10 wave at 10m is 1m or a little over 3 feet. That same ground at 20m needs to be 6 feet or less. Can you get within 3 feet of a good RF ground from your operating position? I didn't think so. Neither can I so I don't bother. Once the ground wire reaches 1/4 wave it no longer functions as a ground. It is an open circuit to RF current flow -- completely useless. 4. Move the computer as close the radio as is physically possible. Having the radio setting on top of the computer is not too close. Put a short and heavy bonding strap between computer and radio. The worst thing you can do is have the computer separated from the radio by 3-6 feet, e.g. with the radio on the top of the operating surface and the computer under it, separated by some space for your legs. Does this sound familiar? 5. If you really want to get carried away with doing this right, make a bonding plate at your operating position. Get a sheet of copper or brass that will sit under all your equipment and even extends out to the operating position. Use short, fat bonding cables/straps directly from each piece of equipment to the bonding plate. That will ensure a low-impedance, low-inductance path between all components and keep RF potential difference between components to a minimum, thus ensuring that little or no RF current flows over the signal cables between components. If you don't want it to have to polish it, throw a coat of clear polyurethane over it. Yeah, I know, this sounds like hard work. Isn't there an easier way? Sure, cut corners and hope it works. If it does, you win. If it didn't then you need to start approaching the problem using understanding of the flow of RF currents on conductors. Good luck! -- Brian Lloyd, WB6RQN/J79BPL 3191 Western Dr. Cameron Park, CA 95682 br...@lloyd.com +1.767.617.1365 (Dominica) +1.916.877.5067 (USA) ___ 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] Flex 3K and 5K software shut down QRO
Very well put, Brian. This is exactly the right and professional way to do things, and it always works. I'd add just one more suggestion, which most hams won't be able to use. Locate your antenna far enough away so that your shack isn't in the near field, if possible. This prevents currents from being induced on the cables in your shack. George, PJ5/KJ6VW On 13-Sep-11 11:29, Brian Lloyd wrote: I have been holding off to weigh in here on this discussion and now I feel the need. First, I am going to blaspheme and tell you that grounding doesn't matter. That's right, you heard me -- grounding doesn't matter ... at the radios. In fact, it is entirely possible that grounding will exacerbate the problem! The real problem is that the different components in your shack are at different RF potentials and if you connect them with conductors, RF currents will traverse those conductors. This is why chokes help the problem: they introduce impedance to the RF currents flowing on the outsides of conductors. What IS important is *bonding*. We want very short (much less than 1/10 wavelength), low-impedance connections between components. We want them all at the same RF potential. If they are, RF currents won't flow between them. And what RF currents do flow, we want them to flow over the bonding straps, not flowing over the signal cables. Make the signal cables high-impedance (with chokes) to the RF. So why do people find that a good ground at the radios helps things? It is because, in their attempt to create a good ground they have actually created a good BOND between the components, and that IS useful. So, if you really want to solve the problems, try the following: 1. Create a proper entry for your antenna cables entering the building. In the case of coax this is a ground-plate with a very short ground cable to a good RF and protective ground (not necessarily the same thing) at the entry to the building. Your lightning arrestors are mounted to this plate too. Each coax cable connects to a lightning arrester that is mounted directly to the ground plate. This ensures that the coax shield is at RF ground potential where the coax enters your building. BTW, do this at the base of the antenna too if the base of the antenna and the entrance of the building are separated by more than a few feet. 2. Place common mode chokes both before and after this ground plate. 3. Dispense with the RF ground at the shack itself unless you can make that ground be 1/10 wave or less. BTW, 1/10 wave at 10m is 1m or a little over 3 feet. That same ground at 20m needs to be 6 feet or less. Can you get within 3 feet of a good RF ground from your operating position? I didn't think so. Neither can I so I don't bother. Once the ground wire reaches 1/4 wave it no longer functions as a ground. It is an open circuit to RF current flow -- completely useless. 4. Move the computer as close the radio as is physically possible. Having the radio setting on top of the computer is not too close. Put a short and heavy bonding strap between computer and radio. The worst thing you can do is have the computer separated from the radio by 3-6 feet, e.g. with the radio on the top of the operating surface and the computer under it, separated by some space for your legs. Does this sound familiar? 5. If you really want to get carried away with doing this right, make a bonding plate at your operating position. Get a sheet of copper or brass that will sit under all your equipment and even extends out to the operating position. Use short, fat bonding cables/straps directly from each piece of equipment to the bonding plate. That will ensure a low-impedance, low-inductance path between all components and keep RF potential difference between components to a minimum, thus ensuring that little or no RF current flows over the signal cables between components. If you don't want it to have to polish it, throw a coat of clear polyurethane over it. Yeah, I know, this sounds like hard work. Isn't there an easier way? Sure, cut corners and hope it works. If it does, you win. If it didn't then you need to start approaching the problem using understanding of the flow of RF currents on conductors. Good luck! ___ 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] Flex 3K and 5K software shut down QRO
OK...this is a shameless plug. If anyone is working on a project to do this I have a Polyphaser 8PEEP-M gounding panel/cable entry unit available that includes the 1.5 inch copper straps to connect to surge protectors. 73 Greg AB7R On 9/13/2011 8:29 AM, Brian Lloyd wrote: I have been holding off to weigh in here on this discussion and now I feel the need. First, I am going to blaspheme and tell you that grounding doesn't matter. That's right, you heard me -- grounding doesn't matter ... at the radios. In fact, it is entirely possible that grounding will exacerbate the problem! The real problem is that the different components in your shack are at different RF potentials and if you connect them with conductors, RF currents will traverse those conductors. This is why chokes help the problem: they introduce impedance to the RF currents flowing on the outsides of conductors. What IS important is *bonding*. We want very short (much less than 1/10 wavelength), low-impedance connections between components. We want them all at the same RF potential. If they are, RF currents won't flow between them. And what RF currents do flow, we want them to flow over the bonding straps, not flowing over the signal cables. Make the signal cables high-impedance (with chokes) to the RF. So why do people find that a good ground at the radios helps things? It is because, in their attempt to create a good ground they have actually created a good BOND between the components, and that IS useful. So, if you really want to solve the problems, try the following: 1. Create a proper entry for your antenna cables entering the building. In the case of coax this is a ground-plate with a very short ground cable to a good RF and protective ground (not necessarily the same thing) at the entry to the building. Your lightning arrestors are mounted to this plate too. Each coax cable connects to a lightning arrester that is mounted directly to the ground plate. This ensures that the coax shield is at RF ground potential where the coax enters your building. BTW, do this at the base of the antenna too if the base of the antenna and the entrance of the building are separated by more than a few feet. 2. Place common mode chokes both before and after this ground plate. 3. Dispense with the RF ground at the shack itself unless you can make that ground be 1/10 wave or less. BTW, 1/10 wave at 10m is 1m or a little over 3 feet. That same ground at 20m needs to be 6 feet or less. Can you get within 3 feet of a good RF ground from your operating position? I didn't think so. Neither can I so I don't bother. Once the ground wire reaches 1/4 wave it no longer functions as a ground. It is an open circuit to RF current flow -- completely useless. 4. Move the computer as close the radio as is physically possible. Having the radio setting on top of the computer is not too close. Put a short and heavy bonding strap between computer and radio. The worst thing you can do is have the computer separated from the radio by 3-6 feet, e.g. with the radio on the top of the operating surface and the computer under it, separated by some space for your legs. Does this sound familiar? 5. If you really want to get carried away with doing this right, make a bonding plate at your operating position. Get a sheet of copper or brass that will sit under all your equipment and even extends out to the operating position. Use short, fat bonding cables/straps directly from each piece of equipment to the bonding plate. That will ensure a low-impedance, low-inductance path between all components and keep RF potential difference between components to a minimum, thus ensuring that little or no RF current flows over the signal cables between components. If you don't want it to have to polish it, throw a coat of clear polyurethane over it. Yeah, I know, this sounds like hard work. Isn't there an easier way? Sure, cut corners and hope it works. If it does, you win. If it didn't then you need to start approaching the problem using understanding of the flow of RF currents on conductors. Good luck! ___ 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] Flex 3K and 5K software shut down QRO.
No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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] Flex 3K and 5K software shut down QRO.
Hi John. I run full legal limit power on both SSB and AM using a 5000A. While I never had the exact problem you describe, I did have RF getting into the audio and some other strange symptoms while operating high power. My solution was to install snap-on ferrites on every cable plugged into the 5000A. That included the audio in and out cables, TX-1 and TX-2, PTT for foot switch, and the Firewire and 12VDC cable. No glitches after doing this. Good luck. Hope you find the resolution to your problem. 73, Bill - W1MPY -Original Message- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of W1JCW Sent: Monday, September 12, 2011 8:54 AM To: flexradio@flex-radio.biz Subject: [Flexradio] Flex 3K and 5K software shut down QRO. No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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/ - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1392 / Virus Database: 1520/3892 - Release Date: 09/12/11 - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1392 / Virus Database: 1520/3892 - Release Date: 09/12/11 ___ 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] Flex 3K and 5K software shut down QRO.
Hello John, i had the same problem with my PC. I had to change the new USB Keyboard to an older PS2 Keybord and after that i could work with 100 Watts again... Perhaps it works for you too? 73's Mathias HB9DOU 2011/9/12 W1JCW w1...@hotmail.com No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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] Flex 3K and 5K software shut down QRO.
Key, mike, audio to spkr amp, SPEAKER CABLES!, power cable, etc. etc. EVERY WIRE! To BOTH PC and FLEX. Then there will be one more that you missed! Then you got it. Been there, done that. I still feel stupid about the actual leads to the speaker. RF on them was locking the keyboard. RF on the KEY was finding its way into the audio. I am barely able to use cw so the key just didn't get my attention for quite a while! EVERY wire! Jim W4YXU -Original Message- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-bounces@flex- radio.biz] On Behalf Of ma...@sunrise.ch Sent: Monday, September 12, 2011 8:28 AM To: W1JCW Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] Flex 3K and 5K software shut down QRO. Hello John, i had the same problem with my PC. I had to change the new USB Keyboard to an older PS2 Keybord and after that i could work with 100 Watts again... Perhaps it works for you too? 73's Mathias HB9DOU 2011/9/12 W1JCW w1...@hotmail.com No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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] Flex 3K and 5K software shut down QRO.
You might try an isolator from RFWorks between the antenna and your shack. That or an UNUN/BALUN depending on your antenna situation. BTW, what are your antennas? 73 Neal On Mon, Sep 12, 2011 at 8:54 AM, W1JCW w1...@hotmail.com wrote: No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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/ -- Abroham Neal Software www.abrohamnealsoftware.com Work:(540) 645 5394 Mobile:(540) 645 8171 ___ 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] Flex 3K and 5K software shut down QRO.
What MIX was the chokes you put on your Firewire cable? They need to be something like MIX31, If you bought the ones from Radio Shack I think they are MIX73 which gives a lot less resistance to RF on the skin of the firewire cable at HF frequencies then MIX31. What kind of Antenna? IF your trying to tune a Antenna that is NOT resonant then the COAX right out of your Antenna tuner is Radiating in your shack and you may NEVER get rid of the RF in the shack until a Antenna change. What kind of COAX? You should use a good quality of COAX to get the RF out of the shack, If your using some old RG-8 it may only have 80% shielding and is leaking and you may want to change it out to one of the Double Shielded types to get it out side where you REALLY need to have a constant mode choke installed. Coax length between Radio / AMP / tuner. This is a common problem when you have a coax jumper that is Just the right or wrong length try changing the length of the Jumpers to a different length. The thing with RF in the shack, is that you always had it with your set up no mater what radio you use, it just the Flex picks it up on the cheep firewire cables more then a normal radio. You also may need to put the Snap on chokes preferably MIX31, on EVERY Cable coming out of the FLEX including the MIC, Speakers, Coax Cables as well as the Firewire cable. 73's and Hope you get it figured out. Bret WX7Y -Original Message- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of W1JCW Sent: Monday, September 12, 2011 6:54 AM To: flexradio@flex-radio.biz Subject: [Flexradio] Flex 3K and 5K software shut down QRO. No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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/ -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ___ 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] Flex 3K and 5K software shut down QRO.
Jim's advice is good. I would add that there are some really good (hundred page plus) postings on the web that you should read and also google the topic common mode RF chokes or ferrites. That multitude of cables that you undoubtedly hung from the back of the 5000A, while a blessing, can easily become a curse! In my own case I have several hundred dollars worth of those clip on ferrite chokes and, at one recent count, 23 standard 8 ft. plated steel ground rods and even then, I find that from time to time the cat moves a cable and I can see a little RF! A week ago a fellow I'm elmering asked me a question that I'm sure he thought was simple: Lee, how should I ground my station. I thought about that a couple of days before answering him. To do a really proper job you have to start when you build the house. Everything else is a compromise and experiment! It's just part of ham radio! 73 Lee K9WRU - Original Message - From: jim jb...@bellsouth.net To: ma...@sunrise.ch; 'W1JCW' w1...@hotmail.com Cc: flexradio@flex-radio.biz Sent: Monday, September 12, 2011 7:36 AM Subject: Re: [Flexradio] Flex 3K and 5K software shut down QRO. Key, mike, audio to spkr amp, SPEAKER CABLES!, power cable, etc. etc. EVERY WIRE! To BOTH PC and FLEX. Then there will be one more that you missed! EVERY wire! Jim W4YXU -Original Message- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-bounces@flex- radio.biz] On Behalf Of ma...@sunrise.ch Sent: Monday, September 12, 2011 8:28 AM To: W1JCW Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] Flex 3K and 5K software shut down QRO. Hello John, i had the same problem with my PC. I had to change the new USB Keyboard to an older PS2 Keybord and after that i could work with 100 Watts again... Perhaps it works for you too? 73's Mathias HB9DOU 2011/9/12 W1JCW w1...@hotmail.com No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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] Flex 3K and 5K software shut down QRO.
Have friend trhat was running a Accom 1000 and had rfi isssues we battled these until he switched to a Ten tec Centurion, running 400 watts more power bt no rfi. Have another person running Accom 1000 has same issue. It appears the Accom might have a little issue. Run Alpha 8410 1500 watts out no ferrite chokes anywhere no rfi. -Original Message- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of W1JCW Sent: Monday, September 12, 2011 7:54 AM To: flexradio@flex-radio.biz Subject: [Flexradio] Flex 3K and 5K software shut down QRO. No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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] Flex 3K and 5K software shut down QRO.
I, like the others who've checked in here, have put ferrites on every single cable in the shack. It seems like overkill but I've had absolutely no issues with RF since doing so. Also, of course, be sure that your station ground is really good, ground wires or straps are as short as possible, and all that stuff that you doubtless have done already. Good luck. You'll find the entry point sooner or late. Hopefully sooner. Bill On Mon, Sep 12, 2011 at 9:41 AM, Neal Campbell abrohamn...@gmail.comwrote: You might try an isolator from RFWorks between the antenna and your shack. That or an UNUN/BALUN depending on your antenna situation. BTW, what are your antennas? 73 Neal On Mon, Sep 12, 2011 at 8:54 AM, W1JCW w1...@hotmail.com wrote: No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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/ -- Abroham Neal Software www.abrohamnealsoftware.com Work:(540) 645 5394 Mobile:(540) 645 8171 ___ 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] Flex 3K and 5K software shut down QRO.
Same problem here. Found out it was the computer keyboard that was picking up the RF. Purchased a wireless keyboard and mouse...end of problem. Paul Delaney - K6HR paul.hamra...@verizon.net http://k6hr.dyndns.org:8080 -Original Message- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-bounces@flex- radio.biz] On Behalf Of William H. Fite Sent: Monday, September 12, 2011 07:57 To: Neal Campbell Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] Flex 3K and 5K software shut down QRO. I, like the others who've checked in here, have put ferrites on every single cable in the shack. It seems like overkill but I've had absolutely no issues with RF since doing so. Also, of course, be sure that your station ground is really good, ground wires or straps are as short as possible, and all that stuff that you doubtless have done already. Good luck. You'll find the entry point sooner or late. Hopefully sooner. Bill On Mon, Sep 12, 2011 at 9:41 AM, Neal Campbell abrohamn...@gmail.comwrote: You might try an isolator from RFWorks between the antenna and your shack. That or an UNUN/BALUN depending on your antenna situation. BTW, what are your antennas? 73 Neal On Mon, Sep 12, 2011 at 8:54 AM, W1JCW w1...@hotmail.com wrote: No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX- 5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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/ -- Abroham Neal Software www.abrohamnealsoftware.com Work:(540) 645 5394 Mobile:(540) 645 8171 ___ 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] Flex 3K and 5K software shut down QRO.
John another approach might be to UN-plug as much stuff as you can from the radio, and see if the problem goes awaymy experience with ferrites has been 'get the big ones'.. so you can put more than one turn through them. remember ' N squared ' ??...and, like others, have found 31 mix really is magic... another 'reference' article: http://www.ifwtech.co.uk/g3sek/in-prac/index.htm#1005 in addition to K9YC's excellent articles...and others... then again, if the problem is just on 20m, have you tried making the antenna feedline another quarter wavelength longer, on say 14.150 ? 73, good luck, w5xz, dan --- On Mon, 9/12/11, William H. Fite omni...@gmail.com wrote: From: William H. Fite omni...@gmail.com Subject: Re: [Flexradio] Flex 3K and 5K software shut down QRO. To: Neal Campbell abrohamn...@gmail.com Cc: flexradio@flex-radio.biz Date: Monday, September 12, 2011, 2:56 PM I, like the others who've checked in here, have put ferrites on every single cable in the shack. It seems like overkill but I've had absolutely no issues with RF since doing so. Also, of course, be sure that your station ground is really good, ground wires or straps are as short as possible, and all that stuff that you doubtless have done already. Good luck. You'll find the entry point sooner or late. Hopefully sooner. Bill On Mon, Sep 12, 2011 at 9:41 AM, Neal Campbell abrohamn...@gmail.comwrote: You might try an isolator from RFWorks between the antenna and your shack. That or an UNUN/BALUN depending on your antenna situation. BTW, what are your antennas? 73 Neal On Mon, Sep 12, 2011 at 8:54 AM, W1JCW w1...@hotmail.com wrote: No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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/ -- Abroham Neal Software www.abrohamnealsoftware.com Work:(540) 645 5394 Mobile:(540) 645 8171 ___ 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] Flex 3K and 5K software shut down QRO.
I will try to unplug what I can. I have the speakers, ptt / din plug and amp key line. Yes I'm familiar with the mix 31 large, that's the way to go. I've never had an issue with 20m feed line, but can add another piece of coax to see. Stand how its only on 20m. Thanks for the reply. John From: dan edwards Sent: Monday, September 12, 2011 10:13 AM To: Neal Campbell ; William H. Fite Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] Flex 3K and 5K software shut down QRO. John another approach might be to UN-plug as much stuff as you can from the radio, and see if the problem goes awaymy experience with ferrites has been 'get the big ones'.. so you can put more than one turn through them. remember ' N squared ' ??...and, like others, have found 31 mix really is magic... another 'reference' article: http://www.ifwtech.co.uk/g3sek/in-prac/index.htm#1005 in addition to K9YC's excellent articles...and others... then again, if the problem is just on 20m, have you tried making the antenna feedline another quarter wavelength longer, on say 14.150 ? 73, good luck, w5xz, dan ___ 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] Flex 3K and 5K software shut down QRO.
To make things worse, every situation differs somewhat. When I used a 5-W transmitter, I had no RFI problems (one ground rod). Changed to a 100-watt ICOM IC-7000, and everything went nuts. I added two more 8-ft. ground rods and a few ferrites, and the problem was mostly solved. The coax line isolator and use of a copper ground bus for the radio and AT-Auto fixed everything, and I have since removed all the ferrite chokes. Now using this setup with the Flex 5000 without problems. 73, Jerry Sent from my Verizon Wireless BlackBerry -Original Message- From: William H. Fite omni...@gmail.com Sender: flexradio-boun...@flex-radio.biz Date: Mon, 12 Sep 2011 10:56:30 To: Neal Campbellabrohamn...@gmail.com Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] Flex 3K and 5K software shut down QRO. I, like the others who've checked in here, have put ferrites on every single cable in the shack. It seems like overkill but I've had absolutely no issues with RF since doing so. Also, of course, be sure that your station ground is really good, ground wires or straps are as short as possible, and all that stuff that you doubtless have done already. Good luck. You'll find the entry point sooner or late. Hopefully sooner. Bill On Mon, Sep 12, 2011 at 9:41 AM, Neal Campbell abrohamn...@gmail.comwrote: You might try an isolator from RFWorks between the antenna and your shack. That or an UNUN/BALUN depending on your antenna situation. BTW, what are your antennas? 73 Neal On Mon, Sep 12, 2011 at 8:54 AM, W1JCW w1...@hotmail.com wrote: No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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/ -- Abroham Neal Software www.abrohamnealsoftware.com Work:(540) 645 5394 Mobile:(540) 645 8171 ___ 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] Flex 3K and 5K software shut down QRO.
One more item I noticed - some of the new computer cases are NOT all metal enclosed. That did make a small difference in my case. Jim W4YXU -Original Message- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-bounces@flex- radio.biz] On Behalf Of William H. Fite Sent: Monday, September 12, 2011 9:57 AM To: Neal Campbell Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] Flex 3K and 5K software shut down QRO. I, like the others who've checked in here, have put ferrites on every single cable in the shack. It seems like overkill but I've had absolutely no issues with RF since doing so. Also, of course, be sure that your station ground is really good, ground wires or straps are as short as possible, and all that stuff that you doubtless have done already. Good luck. You'll find the entry point sooner or late. Hopefully sooner. Bill On Mon, Sep 12, 2011 at 9:41 AM, Neal Campbell abrohamn...@gmail.comwrote: You might try an isolator from RFWorks between the antenna and your shack. That or an UNUN/BALUN depending on your antenna situation. BTW, what are your antennas? 73 Neal On Mon, Sep 12, 2011 at 8:54 AM, W1JCW w1...@hotmail.com wrote: No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX- 5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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/ -- Abroham Neal Software www.abrohamnealsoftware.com Work:(540) 645 5394 Mobile:(540) 645 8171 ___ 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] Flex 3K and 5K software shut down QRO.
Probably a good idea to avoid those gamer cases with the plexiglass sides and spiffy blue LEDs. On Mon, Sep 12, 2011 at 12:35 PM, jim jb...@bellsouth.net wrote: One more item I noticed - some of the new computer cases are NOT all metal enclosed. That did make a small difference in my case. Jim W4YXU -Original Message- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-bounces@flex- radio.biz] On Behalf Of William H. Fite Sent: Monday, September 12, 2011 9:57 AM To: Neal Campbell Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] Flex 3K and 5K software shut down QRO. I, like the others who've checked in here, have put ferrites on every single cable in the shack. It seems like overkill but I've had absolutely no issues with RF since doing so. Also, of course, be sure that your station ground is really good, ground wires or straps are as short as possible, and all that stuff that you doubtless have done already. Good luck. You'll find the entry point sooner or late. Hopefully sooner. Bill On Mon, Sep 12, 2011 at 9:41 AM, Neal Campbell abrohamn...@gmail.comwrote: You might try an isolator from RFWorks between the antenna and your shack. That or an UNUN/BALUN depending on your antenna situation. BTW, what are your antennas? 73 Neal On Mon, Sep 12, 2011 at 8:54 AM, W1JCW w1...@hotmail.com wrote: No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX- 5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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/ -- Abroham Neal Software www.abrohamnealsoftware.com Work:(540) 645 5394 Mobile:(540) 645 8171 ___ 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] Flex 3K and 5K software shut down QRO.
Hello John, I had the same issue at first. I now can run full 1.5kw with no issues. The trick is to think simple (see below). One thing that is almost always overlooked is equipment placement. Put everything that is computer on one side of the Flex and everything RF on the other side with NO CABLES crossing. EXAMPLE In my case I have the computer stuff on the left side of the operating desk. The Flex on the desk. Amp and tuner on the Right side of desk. The antenna cables go to the right of the amp and tuner. Again, NO CABLES CROSSING. Going from only one inch separation to several feet makes an amazing difference. Now if you still have any issue, it will be low level and will take few ferrites (if any) to fix it. I can remove all grounding (for testing) and still do not have RFI. Let the cables cross and it is a different story. Please let me know how you make out and feel free to ask any questions with direct email. I have been a ham for 50 years and have always looked at equipment placement and that has paid off. The best part is that it is free. 73, Bruce, W8HW, w...@att.net I fix ham radios and have fixed two way radios for 40 years. - Original Message - From: W1JCW w1...@hotmail.com To: flexradio@flex-radio.biz Sent: Monday, September 12, 2011 8:54 AM Subject: [Flexradio] Flex 3K and 5K software shut down QRO. No luck adding the ground or the two chokes on each end of the fire ware cable. It seems just 20m even when I don't use my Acom 2k. If I turn the drive up to 75w the audio cuts in and out and I can hear the relays in the 5K. All other bands qro are fine, no issue. Must be some harmonic on 20m getting into the box or feeding back into it. Suggestions ?? 73- W1JCW John From: W1JCW Sent: Friday, September 09, 2011 8:44 AM To: Ray, K9DUR Subject: Flex 3K and 5K software shut down QRO. I don't have a ground on the PC so I'll add that tonight and see how it works. I did have a choke on each end of the fw cable but that didn't work but I had no ground then. I'll put a choke on each end of the fw if adding the ground on the PC doesn't work. Stay tuned. Thanks for the replies. 73- W1JCW John From: Ray, K9DUR Sent: Thursday, September 08, 2011 8:11 PM To: fmeac...@aol.com ; flexradio@flex-radio.biz Subject: Re: [Flexradio] Current Flex 3000 software shuts down when runninghigh power. Frank, That definitely sounds like RF feedback. The most likely culprit is the firewire cable. I had the same issue running my amp with my FLEX-5000A. First, make certain that your PC is connected to the shack ground. After all, it is better than half of the radio. If you are using the stock firewire cable that came with the rig, replace it with the one by Granite Digital. Is costs about $40 is availabel from Flex. Finally, if you still are having problems, add ferrite chokes at each end of the firewire cable. The above steps eliminated my RF feedback problems entirely. Now I can run 1kW on all bands with no issues. 73, Ray, K9DUR http://k9dur.info ___ 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] Flex 3K and 5K software shut down QRO.
John, Replacing the firewire cable that came with the radio with the one from Granite Digital is FAR more important than adding chokes to the stock cable. Just changing the cable cured my QRO RF feedback problems. 73, Ray, K9DUR http://k9dur.info ___ 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] Flex 3K and 5K software shut down QRO.
I find that statement interesting Ray. I have a Granite Firewire cable here in the drawer. I was not having any issues with RF on my Firewire cable when I got it but decided for some reason that it would be a better cable. When I attempted to use it I was instantly beset with RF issues on the Firewire cable. The Flex-3000 and Computer are tied to the common ground star fashion and the lead to the ground rod is short. Just my anecdotal experience. Steven On Mon, Sep 12, 2011 at 7:00 PM, Ray, K9DUR k9...@rnacs.com wrote: John, Replacing the firewire cable that came with the radio with the one from Granite Digital is FAR more important than adding chokes to the stock cable. Just changing the cable cured my QRO RF feedback problems. 73, Ray, K9DUR http://k9dur.info ___ 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/ -- Steven L Hess ARS KC6KGE DM05gd22 Skype user flamebait Cell 661 487 0357 (Facetime) Google Voice 661 769 6201 openSUSE Linux 11.3 and 11.4 ___ 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/
