Re: [Repeater-Builder] VXR-7000
Brian wrote: Our local club has been running a 10 Yausu 2410 2 meter repeater for many years. It is run through a Wacom wp-641 4 can duplexer. Great results from this unit and it hears excellentWe recently aquired a new vertex vxr-7000 do to some really nice friends locally. In hooking up the new machine we have terrible desense on lower signals that would still be full quieting into our old machine. First off, just in case of a common mistake: If you replaced the cables going to the duplexer and didn't replace them with good quality double-shielded cable... stop and go do that right now. How much isolation is the Wacom providing, since you just had it tuned. Did the shop give you a report for what they really got out of it? Does the repeater desense into a dummy load, or only if the antenna is attached? Do you have a directional coupler and/or Iso-T that you can inject a weak signal into the repeater with in both scenarios so you can see if the antenna or feedline are part of the problem? Back to a previous thread - do you have an Isolator on it? Are there other high power transmitters near you that could be getting into your transmitter? What's the site like? Do you have any way to see if the transmitter is clean at your selected power output level both into the antenna system and into a dummy load? We had a local shop retune the duplexer and still no luck. We have tried it both with and without the contorller hooked up and no luck. It hears and transmits great in base mode but falls apart in repeat. I wouldn't have suspected the tuned cavity first - unless you dropped it and dented it or something. Cavity size and frequency are physical properties that don't really change much. Something else is more likely to have changed. Nate 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] Anybody have the ability to scan microfiche?
Glenn Little WB4UIV wrote: I also have the LBI library on microfiche. I have copied some at the library onto paper, but the quality is not real good. I suspect that the microfiche is not going to produce great PDF files, but much better than nothing. My set is also available for reproduction to PDF. I have been looking for more than a year now for a scanner that has the resolution to scan the microfiche, but have had no luck. When I attempted to scan one at 2400 dpi optical as if it were a negative, the results were almost unreadable. 73 Glenn WB4UIV At 06:29 PM 07/09/05, you wrote: I received an email that presents an interesting possibility... Mike I don't know if you would be interested of not. I have a set of the old LBI library on microfiche. I have no way of transferring them but I would be glad to make them available to someone who can. I've had enough emails referencing the LBI list web page and asking if I have Mastr-Pro or even Progress line equipment LBIs that the above offer is interesting. So - - - anybody have access to a system that can scan a microfiche and make a PDF out of it? Mike WA6ILQ A google search seems to turn up a number of companies that do this with commercial scanners made for the job. No mention of prices, though. Probably frightening. Nate 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] VXR-7000
As far as what has changedthe new piece of equipment(repeater) is by the specs more then twice as sensitive but on the bench it tested more like 3 times as sensitive as the old repeater. We are going up today to try some more testing and I will get back to this thread with the results. Brian wrote: Our local club has been running a 10 Yausu 2410 2 meter repeater for many years. It is run through a Wacom wp-641 4 can duplexer. Great results from this unit and it hears excellentWe recently aquired a new vertex vxr-7000 do to some really nice friends locally. In hooking up the new machine we have terrible desense on lower signals that would still be full quieting into our old machine. First off, just in case of a common mistake: If you replaced the cables going to the duplexer and didn't replace them with good quality double-shielded cable... stop and go do that right now. How much isolation is the Wacom providing, since you just had it tuned. Did the shop give you a report for what they really got out of it? Does the repeater desense into a dummy load, or only if the antenna is attached? Do you have a directional coupler and/or Iso-T that you can inject a weak signal into the repeater with in both scenarios so you can see if the antenna or feedline are part of the problem? Back to a previous thread - do you have an Isolator on it? Are there other high power transmitters near you that could be getting into your transmitter? What's the site like? Do you have any way to see if the transmitter is clean at your selected power output level both into the antenna system and into a dummy load? We had a local shop retune the duplexer and still no luck. We have tried it both with and without the contorller hooked up and no luck. It hears and transmits great in base mode but falls apart in repeat. I wouldn't have suspected the tuned cavity first - unless you dropped it and dented it or something. Cavity size and frequency are physical properties that don't really change much. Something else is more likely to have changed. Nate WY0X Yahoo! Groups Links -- [EMAIL PROTECTED] Amateur Radio Callsign: KC0DWX WARN (Weather Amateur Radio Network) member 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] VXR-7000
Brian, As I stated eariler you have dense problem and think it is caused by 7000 tx not meeting specs. Could be duplexer, but if it worked with the 2410 it should be fine with 7000...only 8.5 db difference. There could be some desense due to higher power, but sounds like you have a lot more desense. Give me a GE or Motorola any day, hi. Even RCA or some, but few, others. For GE and Mot lots around for spare parts. 73, ron, n9ee/r 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] VXR-7000
Put a 50 ohm step attenuator in series with the receiver feedline---i.e. between the duplexer and the receiver antenna input. Add attenuation until all desense problems just go away. This is the additional attenuation you need from your duplexer due to the improved sensitivity of your new receiver and increased transmitter power if there is any. All things being good and assuming that you haven't added appreciable transmitter power, the repeater should work about as it did before with the attenuator in place. Improve the duplexer to enjoy the improved receiver performance that is a repeater that hears better than before. Scott, N6NXI - Original Message - From: Brian [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, July 11, 2005 3:39 AM Subject: Re: [Repeater-Builder] VXR-7000 As far as what has changedthe new piece of equipment(repeater) is by the specs more then twice as sensitive but on the bench it tested more like 3 times as sensitive as the old repeater. We are going up today to try some more testing and I will get back to this thread with the results. Brian wrote: Our local club has been running a 10 Yausu 2410 2 meter repeater for many years. It is run through a Wacom wp-641 4 can duplexer. Great results from this unit and it hears excellentWe recently aquired a new vertex vxr-7000 do to some really nice friends locally. In hooking up the new machine we have terrible desense on lower signals that would still be full quieting into our old machine. First off, just in case of a common mistake: If you replaced the cables going to the duplexer and didn't replace them with good quality double-shielded cable... stop and go do that right now. How much isolation is the Wacom providing, since you just had it tuned. Did the shop give you a report for what they really got out of it? Does the repeater desense into a dummy load, or only if the antenna is attached? Do you have a directional coupler and/or Iso-T that you can inject a weak signal into the repeater with in both scenarios so you can see if the antenna or feedline are part of the problem? Back to a previous thread - do you have an Isolator on it? Are there other high power transmitters near you that could be getting into your transmitter? What's the site like? Do you have any way to see if the transmitter is clean at your selected power output level both into the antenna system and into a dummy load? We had a local shop retune the duplexer and still no luck. We have tried it both with and without the contorller hooked up and no luck. It hears and transmits great in base mode but falls apart in repeat. I wouldn't have suspected the tuned cavity first - unless you dropped it and dented it or something. Cavity size and frequency are physical properties that don't really change much. Something else is more likely to have changed. Nate WY0X Yahoo! Groups Links -- [EMAIL PROTECTED] Amateur Radio Callsign: KC0DWX WARN (Weather Amateur Radio Network) member 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] VXR-7000
Scott Brian, Putting an attenuator in the rx line only attenuates the desired and desensing receive signal. Still the desired signal to desensing signal ratio will still be the same one should still see the desense with the attenuator, just require more desired signal to overcome it. Except for isolation cannot see whey the attenuator would help. If desense is caused by another RF path, such as bad cables, getting around the duplexer one would see the desense being worse due to rx signal reduced, but desense not reduced. If you replaced any of the cables including between duplexer and repeater, make damn sure the cable is NOT 9913. This will cause noise resulting in desense. The solution is to find out why you have desense and fix it. 73, ron, n9ee/r Ron Wright [EMAIL PROTECTED] Ron is the owner of Micro Computer Concepts, a manufacture of repeaters and repeater controllers since 1988. You may see our products at http://home.earthlink.net/~mccrpt or call at 727-376-6575. Contact me at 8849 Gum Tree Ave, New Port Richey, FL 34653 USA Owner of the 146.64 repeater, the highest repeater, 1175 ft HAAT, in the Tampa Bay area, Florida. The repeater also has ECHOLINK, node 79540. Pasco County Skywarn Coordinator Skywarn meets on 146.64 each Wednesday at 8 PM. Skywarn nets are activated on 146.64 when the National Weather Service broadcast a weather alert. see our web page at http://groups.yahoo.com/group/pascoskywarn/ All are welcome. [Original Message] From: Scott [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Date: 7/11/2005 10:03:32 AM Subject: Re: [Repeater-Builder] VXR-7000 Put a 50 ohm step attenuator in series with the receiver feedline---i.e. between the duplexer and the receiver antenna input. Add attenuation until all desense problems just go away. This is the additional attenuation you need from your duplexer due to the improved sensitivity of your new receiver and increased transmitter power if there is any. All things being good and assuming that you haven't added appreciable transmitter power, the repeater should work about as it did before with the attenuator in place. Improve the duplexer to enjoy the improved receiver performance that is a repeater that hears better than before. Scott, N6NXI - Original Message - From: Brian [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, July 11, 2005 3:39 AM Subject: Re: [Repeater-Builder] VXR-7000 As far as what has changedthe new piece of equipment(repeater) is by the specs more then twice as sensitive but on the bench it tested more like 3 times as sensitive as the old repeater. We are going up today to try some more testing and I will get back to this thread with the results. Brian wrote: Our local club has been running a 10 Yausu 2410 2 meter repeater for many years. It is run through a Wacom wp-641 4 can duplexer. Great results from this unit and it hears excellentWe recently aquired a new vertex vxr-7000 do to some really nice friends locally. In hooking up the new machine we have terrible desense on lower signals that would still be full quieting into our old machine. First off, just in case of a common mistake: If you replaced the cables going to the duplexer and didn't replace them with good quality double-shielded cable... stop and go do that right now. How much isolation is the Wacom providing, since you just had it tuned. Did the shop give you a report for what they really got out of it? Does the repeater desense into a dummy load, or only if the antenna is attached? Do you have a directional coupler and/or Iso-T that you can inject a weak signal into the repeater with in both scenarios so you can see if the antenna or feedline are part of the problem? Back to a previous thread - do you have an Isolator on it? Are there other high power transmitters near you that could be getting into your transmitter? What's the site like? Do you have any way to see if the transmitter is clean at your selected power output level both into the antenna system and into a dummy load? We had a local shop retune the duplexer and still no luck. We have tried it both with and without the contorller hooked up and no luck. It hears and transmits great in base mode but falls apart in repeat. I wouldn't have suspected the tuned cavity first - unless you dropped it and dented it or something. Cavity size and frequency are physical properties that don't really change much. Something else is more likely to have changed. Nate WY0X Yahoo! Groups Links -- [EMAIL PROTECTED] Amateur Radio Callsign: KC0DWX WARN (Weather Amateur Radio Network) member Yahoo! Groups Links Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to:
Re: [Repeater-Builder] GMRS and VOIP
JQP wrote: I personally have bean using EQSO and a remote base on my GMRS system on and off since 2.4 gig came out because the current rules don`t prohibit it the Wish I could read this... -- Jim Barbour WD8CHL 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] Aviation Interference Issue (Update)
At 7/9/2005 07:25 PM, you wrote: First I would like to thank Dave from Muncie, IN and his father for coming out and assisting with the beast of a nuisance. It seems there is some very critical coils inside the exciter, that has very little tolerance. A slight movement and the thing goes whacko. All that can be done now is to watch the output of the exciter on the SA and watch for any spurs. When he started, and I have to admit, I made some adjustments on the exciter over the past few days, but there was spurs that did more than jangle, they sang all over. A good exciter would not be so sensitive to tuning. I'd suggest you start looking for a G.E. Mastr II, Exec II or MVP mobile to replace the Maggiore as your exciter (I picked up an MVP at Dayton but it's already spoken for by a local group in O.C.). You almost can't make them go dirty even if you try! Another possibility: I may still have a Yaesu FTC-24xx exciter board that does about 13 watts out. It was what I used with the receiver you now have. It has no harmonic filter but you don't need one so long as you always drive the PA with it (if the PA is bypassed it's harmonic filter will also be bypassed, so you'd need a LPF or pass cavity). It's in a cheap box that you'd probably want to repackage, but it's light so wouldn't be too much to ship, which is all it would cost you. Bob NO6B 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] Amp ID
Got this E-Mail from a Fellow Friend/ Ham/ Repeater owner and Motorola user I Did not want to tell Him I had no idea what it was. He thinks I know everything about the Old Motorola Stuff; so if anyone can ID This. It will greatly appreciated and of course I would never take credit for it ,Ha Ha Thanks Don KA9QJG Don, Here are the numbers from the Motorola amp module. There are several, so I do not know which one is the one you need. 01T78 7940FW HLE4070A 03T04 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: Amp ID
The HLE4070a part number is possibly an rf transistor on a drop-in module (with caps and base pc board) part number... a lot like the modules used in an MSR2000 rf amp. skipp Don [EMAIL PROTECTED] wrote: Got this E-Mail from a Fellow Friend/ Ham/ Repeater owner and Motorola user I Did not want to tell Him I had no idea what it was. He thinks I know everything about the Old Motorola Stuff; so if anyone can ID This. It will greatly appreciated and of course I would never take credit for it ,Ha Ha Thanks Don KA9QJG Don, Here are the numbers from the Motorola amp module. There are several, so I do not know which one is the one you need. 01T78 7940FW HLE4070A 03T04 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] Aviation Interference Issue (Update)
Hi Bob, well I agree, I could spend hours trying to repair this one and never find the problem. It could be bad solder joints, ot a bad coil all together. Let me take a look before I have you send me that one. I have another exciter, can't recall the name right off hand, nue something like that. Going to tune that one up tomorrow and see how it does. I'm also looking at a Mastr II system, so that may help things quite a bit. SO far I have not heard anything show up on the Aircraft bands, so keeping my fingers crossed. Thanks for the input. MathewBob Dengler [EMAIL PROTECTED] wrote: At 7/9/2005 07:25 PM, you wrote:First I would like to thank Dave from Muncie, IN and his father forcoming out and assisting with the beast of a nuisance. It seems thereis some very critical coils inside the exciter, that has very littletolerance. A slight movement and the thing goes whacko. All that canbe done now is to watch the output of the exciter on the SA and watchfor any spurs. When he started, and I have to admit, I made someadjustments on the exciter over the past few days, but there was spursthat did more than jangle, they sang all over.A good exciter would not be so sensitive to tuning. I'd suggest you start looking for a G.E. Mastr II, Exec II or MVP mobile to replace the Maggiore as your exciter (I picked up an MVP at Dayton but it's already spoken for by a local group in O.C.). You almost can't make them go dirty even if you try!Another possibility: I may still have a Yaesu FTC-24xx exciter board that does about 13 watts out. It was what I used with the receiver you now have. It has no harmonic filter but you don't need one so long as you always drive the PA with it (if the PA is bypassed it's harmonic filter will also be bypassed, so you'd need a LPF or pass cavity). It's in a cheap box that you'd probably want to repackage, but it's light so wouldn't be too much to ship, which is all it would cost you.Bob NO6BYahoo! 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/__Do You Yahoo!?Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Re: [Repeater-Builder] VXR-7000
At 03:39 AM 7/11/05, [EMAIL PROTECTED] wrote: As far as what has changedthe new piece of equipment(repeater) is by the specs more then twice as sensitive but on the bench it tested more like 3 times as sensitive as the old repeater. We are going up today to try some more testing and I will get back to this thread with the results. Spec sensitivity is like a paper repeater. Anybody can write whatever they want. Bench sensitivity is with no noise or other signals - the receiver is operating in the best of all possible worlds. Real world sensitivity (normally called Effective Sensitivity) is what really counts. See Chris Boone's writeup at http://www.repeater-builder.com/tech-info/effectivesens.html If you still have access to the old repeater it would be interesting to see an effective sensitivity number on it, then drop the new repeater into the EXACT same lashup - the same duplexer-to repeater jumpers, the same everything. More below. Nate Duehr WY0X [EMAIL PROTECTED] Our local club has been running a 10 Yausu 2410 2 meter repeater for many years. It is run through a Wacom wp-641 4 can duplexer. Great results from this unit and it hears excellentWe recently aquired a new vertex vxr-7000 do to some really nice friends locally. In hooking up the new machine we have terrible desense on lower signals that would still be full quieting into our old machine. Please describe the entire system - is there a preamp? Is there an isolator/circulator, any cavities other than what is part of the duplexer, what type of antenna, etc. First off, just in case of a common mistake: If you replaced the cables going to the duplexer and didn't replace them with good quality double-shielded cable... stop and go do that right now. RG-142 or RG-400 are two possibilities. 142 has a steel core and can fracture if bent too much, 400 is preferred. See http://www.repeater-builder.com/rbtip/double-shielded-coax.html 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/
[Repeater-Builder] portable ICOM repeater
Several years ago there was a kit you could buy out of 73 CQ QST magazines that fit into a 35mm film canister that would connect two Icom portables together into a repeater, all through the speaker-mic connectors. Did anyone buy one of these kits? Any chance of speaker/mic diagram or list of the parts that were in it? 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] icom portable repeater
Several years ago there was a kit you could buy out of 73 CQ QST magazines that fit into a 35mm film canister that would connect two Icom portables together into a repeater, all through the speaker-mic connectors. By chance does anyone have the instructions or website URL for this? Thanks Chris 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] Aviation Interference Issue (Update)
At 04:24 PM 7/11/2005, Mathew Quaife wrote: Hi Bob, well I agree, I could spend hours trying to repair this one and never find the problem. It could be bad solder joints, ot a bad coil all together. Let me take a look before I have you send me that one. I have another exciter, can't recall the name right off hand, nue something like that. If you like, you can fling the maggiore down here, and I'll put it on the bench. I have the same model, so I'm also interested to know what it is that's going on in there. Makes a nice marker generator though :) 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] VXR-7000
Ok, today we went out on the hill and did much testing. We ended up running the new repeater on 2 antennas as this seems to work and we are going to see how it goes for a bit. Several things were learned while testing things. 1. Our old machine was only putting out about 4 watts before the duplexers. We thought 10 to 12 watts. when we hooked up the new machine into the line with duplexers and all we noticed an odd thing. 2. The new machine took a couple of seconds to come to full power through the duplexers.key up needle on meter moved to about 15 watts kind of slowly and sporadiclly then boom suddenly jumped to full full power. We ended up through much swapping things around isolating this to one of the duplexer cans on the transmit side. Without that one can it keyed up instantly. Has anybody seen this and I assume it means that the can is bad or faulty This problem only showed up on the new repeater as the old one didn't put out enough power to seem to cause this problem. Anyway I really appreciate this list everyone here has been great. Brian -- [EMAIL PROTECTED] Amateur Radio Callsign: KC0DWX WARN (Weather Amateur Radio Network) member 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] Heliax Prices
I have an excess of 7/8 inch Heliax here that I need to sell and haven't a clue as to what the going price is on this stuff. The condition is dent free and clean-a couple of 300 foot and several shorter around 100 feet each lengthsno end connectors. We have a monthly electronic flea market here-what price per foot or whatever should I ask? Scott, N6NXI 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/
