Re: [Repeater-Builder] EPLRS system
I did a google search on EPLRS ... http://www.gordon.army.mil/sigbde15/31C/eplrsrs/INDEX.HTM Neil skipp025 wrote: re: EPLRS system I'd like to communicate with anyone who can provide additional information or describe their experiences in dealing with the EPLRS system. It appears that Travis /or Beale AFB has installed an EPLRS system and high level repeaters in Northern California are receiving serious interference. Please Email me direct thank you skipp skipp025 at yahoo.com Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Repeater Backup Power
FYI,there are DC power supplies available for direct replacement in PC's for 12,24 or 48 volt battery systems. - Original Message - From: Fred Seamans [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, November 18, 2004 8:07 AM Subject: Re: [Repeater-Builder] Repeater Backup Power Justin: First, Your Vertex rep. is full of it! Look at the power consumption on the Vertex repeater between AC and DC, especially the Stby/Rec mode. Now to your question; You have a lot of unanswered questions that need to be decided before any design can be considered. As a retired engineer I can list a few for you. 1. What is the expected duty cycles of each piece of equipment when the power fails? 2. How long do you want emergency power to be operational? 1, 2, 6, 12, 24 hours or days? 3. Is there a physical space limitation on the installation? 4. What type of maintenance is available? 5. Are there any accessibility problems? 6. What are the budget constraints? Are they firm or adjustable? 7. What do you mean by overboard? 8. What level of reliability/redundancy do you want in the emergency system? These are just the beginning of a long list of questions that should be answered before any design is considered. Depending on your answers, there are alternatives that may be considered that will effect price, space requirements and reliability. I can see one difficulty now; the computer requires AC stby power while the other equipment could use either. I would hope that you are not one of the managers that wants the caddy for a chevy price. Since you are not sure about what you need, I would urge you to hire a good technician or engineer to design a system that meets your requirements. Fred W5VAY Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] EPLRS system
More ... http://www.uxxi.org/docs/briefings/dd2n27.pdf http://www.defensedaily.com/progprof/army/eplrs.pdf http://www.stasys.co.uk/networks_technology/other_protocols.htm http://peoc3t.monmouth.army.mil/TRCS/TacRadioProducts.html That should keep you busy for a while ... Neil Neil McKie wrote: I did a google search on EPLRS ... http://www.gordon.army.mil/sigbde15/31C/eplrsrs/INDEX.HTM Neil skipp025 wrote: re: EPLRS system I'd like to communicate with anyone who can provide additional information or describe their experiences in dealing with the EPLRS system. It appears that Travis /or Beale AFB has installed an EPLRS system and high level repeaters in Northern California are receiving serious interference. Please Email me direct thank you skipp skipp025 at yahoo.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] Repeater Backup Power
Fred, Thanks for the reply, I'll try to answer some of your questions below, but first, I failed to mention the first time around that this is not going to be a commercial repeater system; actually, it's a Ham repeater system. Therefore, a handful of others and I are doing the work ourselves; we're just looking for a little guidance and a few suggestions or ideas from those who may have walked down this path before. As for the Vertex repeater, even though there are almost 10 of these repeaters in service for ham applications in this area alone, I'll be the first to do any type of experimenting with the backup power option. The information I provided in my previous E-Mail came from an independent communications company and from Vertex technical support, but leaves me a bit confused. From what I gathered the charging circuit is meant only to float charge the batteries to keep them optimized, not to bring them back from any dead state, such a condition would damage the charging circuit and or the repeater. In fact, it was the Vertex technician who recommended that should AC power fail and the repeater runs the DC batteries below the normal operating voltage, AC power should not be reconnected to the unit until the batteries have been allowed sufficient time to recharge on a separate unit. Like I said above, this makes sense in a way, but yet, confuses me in that how could you stop AC power from coming back on much less have time to get to the site in between to disconnect the DC power source? The computer in this case will not need extended run time as I don't believe the servicing ISP has any type of extended life on the small UPS that they own, I'm looking at just a clean way to bring it down at this point, and I think that a small AC UPS will do the trick for it. One less problem in the mix. I think I can answer most of your questions with a quick summary; I'm looking to get the most I can with what I have. My space requirements are the bottom of a repeater cabinet, I can get to the repeater pretty much any time Monday through Friday and other than two flights of stairs and I can get to the equipment with relative ease. Does this help any? -- Justin W. Pauler E-Mail: [EMAIL PROTECTED] WWW: http://www.jwpauler.org -Original Message- From: sentto-104168-44263-1100610463- [EMAIL PROTECTED] [mailto:sentto-104168-44263- [EMAIL PROTECTED] On Behalf Of Fred Seamans Sent: Thursday, November 18, 2004 7:07 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Repeater Backup Power Justin: First, Your Vertex rep. is full of it! Look at the power consumption on the Vertex repeater between AC and DC, especially the Stby/Rec mode. Now to your question; You have a lot of unanswered questions that need to be decided before any design can be considered. As a retired engineer I can list a few for you. 1. What is the expected duty cycles of each piece of equipment when the power fails? 2. How long do you want emergency power to be operational? 1, 2, 6, 12, 24 hours or days? 3. Is there a physical space limitation on the installation? 4. What type of maintenance is available? 5. Are there any accessibility problems? 6. What are the budget constraints? Are they firm or adjustable? 7. What do you mean by overboard? 8. What level of reliability/redundancy do you want in the emergency system? These are just the beginning of a long list of questions that should be answered before any design is considered. Depending on your answers, there are alternatives that may be considered that will effect price, space requirements and reliability. I can see one difficulty now; the computer requires AC stby power while the other equipment could use either. I would hope that you are not one of the managers that wants the caddy for a chevy price. Since you are not sure about what you need, I would urge you to hire a good technician or engineer to design a system that meets your requirements. Fred W5VAY - Original Message - From: Justin W.Pauler [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 14, 2004 4:10 PM Subject: [Repeater-Builder] Repeater Backup Power Hello All... I am finally in the process of finishing up an install on a personal repeater system and I've come to a dead end, I'm hoping this group might have some answers. My goal is to provide emergency power for all of the equipment in my cabinet for as long as possible, without totally going overboard or over budget. First off, here's the equipment that I have: Vertex VXR-7000 UHF Desktop Repeater @ 50W AC PWR: 1AMP @ 120VAC (TX) .5AMP @ 120VAC (STBY/RX) DC PWR: 7.5AMP @ 12V (TX) 1AMP @ 12V (STBY/RX) Alinco DM-330MV 35AMP Power Supply AC PWR: 120VAC (Unknown AMP/Watt Draw) Pentium II 233 Personal Desktop Computer (No Monitor) AC PWR: 150W PS @ 120VAC Connected to
Re: [Repeater-Builder] Repeater Backup Power
Q wrote: FYI,there are DC power supplies available for direct replacement in PC's for 12,24 or 48 volt battery systems. Where? How much? Mike Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] EPLRS system
On Tue, Nov 16, 2004 at 11:51:25PM -, skipp025 wrote: Skipp, I'm working on a news report regarding EPLRS for one of the ham news outlets to pick up - and I'll post the script text and mailing list information here shortly. Probably send it off to Newsline in the next day or two, and see if Bill and gang want to carry it. It's been causing quite a large amount of interference here in Denver for about 3 years, and once we started noticing reports of problems coming in from other areas, we started looking into how widespread the problem might be. Generally, it's big. And the particular EPLRS systems we've been struggling with here covers the entire range of 430-450 MHz. (Confirmed by the Denver FCC Field Office.) The fix will be complex. The band is primary for the military for certain uses (radiolocation), but then if you dig further, later rules from NTIA very strongly specify that the hams be protected as if we were primary. If your UHF repeater is RF line-of-sight to a military facility (there are allegedly 28 states either affected or soon to be affected, many of those with multiple installations) and you hear a very regular ignition type noise on weak signal users of your repeater, there's a very good chance it's EPLRS. I'll post more info, hopefully within a day or two. -- Nate Duehr [EMAIL PROTECTED] - WY0X Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: EPLRS system
Thanks Neil and Nate... please keep me posted if you find anything out. I've got a pile of paperwork to go through. Northern California is now in EPLRS purgatory skipp Nate Duehr [EMAIL PROTECTED] wrote: On Tue, Nov 16, 2004 at 11:51:25PM -, skipp025 wrote: Skipp, I'm working on a news report regarding EPLRS for one of the ham news outlets to pick up - and I'll post the script text and mailing list information here shortly. Probably send it off to Newsline in the next day or two, and see if Bill and gang want to carry it. It's been causing quite a large amount of interference here in Denver for about 3 years, and once we started noticing reports of problems coming in from other areas, we started looking into how widespread the problem might be. Generally, it's big. And the particular EPLRS systems we've been struggling with here covers the entire range of 430-450 MHz. (Confirmed by the Denver FCC Field Office.) The fix will be complex. The band is primary for the military for certain uses (radiolocation), but then if you dig further, later rules from NTIA very strongly specify that the hams be protected as if we were primary. If your UHF repeater is RF line-of-sight to a military facility (there are allegedly 28 states either affected or soon to be affected, many of those with multiple installations) and you hear a very regular ignition type noise on weak signal users of your repeater, there's a very good chance it's EPLRS. I'll post more info, hopefully within a day or two. -- Nate Duehr [EMAIL PROTECTED] - WY0X Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Repeater Backup Power
look hear http://www.cyberresearch.com/store/categorybrowse.aspx?categoryid=66 At 08:34 AM 11/17/2004, you wrote: Q wrote: FYI,there are DC power supplies available for direct replacement in PC's for 12,24 or 48 volt battery systems. Where? How much? Mike Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] radial tire static?
Not repeater related so much, but I thought the great minds here might know... One of my corporate bosses, a ham, is having his bridgestone tires generate static while they are rolling, interfering with AM radio reception. I know somebody used to sell a powder to put in the tires that dissapated the static, but can't find any info on it now. It has to do with some problem with low rolling resistance tires that have low carbon content.. Any ideas? thanks! dave Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Repeater Backup Power
Another idea is to look at the Mini-ITX motherboards - some of them use a external +12v power supply and make all the other voltages on the motherboard itself. Mike WA6ILQ At 10:20 AM 11/17/04, you wrote: look hear http://www.cyberresearch.com/store/categorybrowse.aspx?categoryid=66 At 08:34 AM 11/17/2004, you wrote: Q wrote: FYI,there are DC power supplies available for direct replacement in PC's for 12,24 or 48 volt battery systems. Where? How much? Mike Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] radial tire static?
I just sent an email to bridgestone, also looked in Google search , all they talk about is tire talc for Bicycycles, I probably presume he has plastic hub caps also. the old days of metal caps was some sort of spring device . when I get a response I'll post 4 everyone. Mark Holman, CRO AB8RU - Original Message - From: na6df [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Wednesday, November 17, 2004 4:11 PM Subject: [Repeater-Builder] radial tire static? Not repeater related so much, but I thought the great minds here might know... One of my corporate bosses, a ham, is having his bridgestone tires generate static while they are rolling, interfering with AM radio reception. I know somebody used to sell a powder to put in the tires that dissapated the static, but can't find any info on it now. It has to do with some problem with low rolling resistance tires that have low carbon content.. Any ideas? thanks! dave Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
RE: [Repeater-Builder] radial tire static?
Dave: I remember when this was a problem that seemed to surface years ago more with fiberglass belted radial tires than with steel beltedand also a problem with the older bias-ply tires. One thing I heard many years ago from one mechanic that really seemed to understand the problem was to wait for a rainy day with 80-90% humidity in the air, then one by one, release the air from your tires and re-inflate them with this wetter ambient air from your air compressor. If your tires didn't have any leaks then the air inside the tires would remain highly humid and keep the static bled off. But, I also understand that some sports car and luxury car tire purists are listening to the BS being preached from some tire dealers which recommend inflating with a dry gas (Nitrogen) to keep the Oxygen in atmospheric air from attacking the rubber content of the internal tire !! Of course, they want to charge a premium price to inflate your tires. Dry Nitrogen gas would tend to make for a terrible build up of static in a rotating tire. Ron WW8RR -Original Message- From: na6df [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 17, 2004 4:12 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] radial tire static? Not repeater related so much, but I thought the great minds here might know... One of my corporate bosses, a ham, is having his bridgestone tires generate static while they are rolling, interfering with AM radio reception. I know somebody used to sell a powder to put in the tires that dissapated the static, but can't find any info on it now. It has to do with some problem with low rolling resistance tires that have low carbon content.. Any ideas? thanks! dave Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] radial tire static?
--- na6df [EMAIL PROTECTED] wrote: Not repeater related so much, but I thought the great minds here might know... One of my corporate bosses, a ham, is having his bridgestone tires generate static while they are rolling, interfering with AM radio reception. I know somebody used to sell a powder to put in the tires that dissapated the static, but can't find any info on it now. It has to do with some problem with low rolling resistance tires that have low carbon content.. Any ideas? thanks! I don't know if it will work to reduce the static but the powder was powdered graphite. It was sometimes used in locks for lubercation in cold areas. __ Do you Yahoo!? The all-new My Yahoo! - Get yours free! http://my.yahoo.com Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Repeater Backup Power
Cool! I never knew that there was such a product. Thanks! Mike kb9yku wrote: look hear http://www.cyberresearch.com/store/categorybrowse.aspx?categoryid=66 At 08:34 AM 11/17/2004, you wrote: Q wrote: FYI,there are DC power supplies available for direct replacement in PC's for 12,24 or 48 volt battery systems. Where? How much? Mike Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
