[Repeater-Builder] Re: Diamond X500
You're right Steve I left out the part about the chambers being on a timer and alternating. Here is what I found, 1. the folks that put up the scaffold,..the kind that hangs off the side of the roof, had hit the hard line and loosened it from the Connector at the antenna, I re made the conector. 2. I found water inside the connector likely from #1 above. 3. The antenna had a small amount of moisture inside, not enough to pour out but enough to get the lower Foam wet. All joints are taped with fusing silicone rubber tape and over taped with 1 1/2 inch electrical tape. Still a little reflected but I plan to go back after it has a while to dryout and re check it, and solder jumpers around the screw connections inside. 73 AC0Y --- In Repeater-Builder@yahoogroups.com, Steve Grantham [EMAIL PROTECTED] wrote: Coy, There ya go! I thought it was probably a short transmission line since you said something about throwing the antenna off the roof. (he he!) If you do pressurize it, think about using a UV resistant air line.. and not more than a couple of PSI would seem to be enough.. Funny thing about all that silica gel that you see in new consumer electronics packaging.. it's always white.. That's because it's full of moisture. For the silica gel to do any good, it has to be dried. Sure.. you can bake it in the oven or in a toaster oven to make it nice and dark.. but after a while it would turn pinkish and continue to lighten up. Dehydrators like the one you mention will dry the silica gel in the chambers after they have dehydrated the air. This is why they have two chambers, and alternate between them. Steve - Original Message - From: Coy Hilton [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, October 16, 2004 10:03 PM Subject: [Repeater-Builder] Re: Diamond X500 Hi Steve, I'm going up to the site Sunday and I will likely not pressureize it, But I will be thinking about the suggestion for a good while. I would consider sense the half inch hardline is only thirty feet long to the sky hook, running a small airline to it and using a aquerium (?) pump to pressurize it. BUT I Will likely use some Scotch brand tape that I have that fuses to it self to water proof the fiber glass joints after drying it out with a trusty hair dryer. I wish I had about 5 pounds of Silica JELL. Oh, while I was consulting for ANDREW Corp, some years ago I had a chance to take a look at their sweet little HELIAX pressureizer. It had a small GATES compresser mounted on a chassis and sucked air in through two chambers of Silica Jell and pumped it into the hard line. It worked really well. 73 AC0Y --- In Repeater-Builder@yahoogroups.com, Steve Grantham [EMAIL PROTECTED] wrote: Coy.. I was just joking.. However, if you could get an air connector mounted on the antenna base somewhere and put pressure on it, then you could soap the antenna and look for bubbles. Once you get the antenna sealed, then perhaps you could charge it, or at least let it weep through the air fitting if it was positioned properly to act as a drain. Tight transmission lines are often pressurized with nitrogen. Microwave and cellular lines and antennae are often pressurized using dry air. A dehydrator, a compressor with a dryer, won't run out and need replacement like a nitrogen bottle would, and is more suited to leaky antenna systems. As long as you keep positive pressure on the line... no worrys... concerning water ingress anyway. Seriously, I don't know much about the Diamond X500 (dimensions, etc.), but if you can put an air fitting on it, then you can probably fix it.. Perhaps you can go to the auto parts or the tire store to get an air fitting. They pressurize tires, don't they? (Let me know if you spin balance it.. hi hi!) Steve - Original Message - From: Coy Hilton [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, October 15, 2004 8:19 PM Subject: [Repeater-Builder] Re: Diamond X500 Steve, Great thinking !! sounds like something a thinker, or engineer would come up with. I would even take this one under advisement. 73 AC0Y --- In Repeater-Builder@yahoogroups.com, Steve Grantham [EMAIL PROTECTED] wrote: As long as we're engineering solutions... (hi hi!..) How about using an air-dielectric cable and pressurizing the Diamond radome with an inter-connecting jumper (hose) using a dehydrator... Positive air pressure, air egress, can prevent water ingress.. 73 HI! Steve - Original Message - From: Brent [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, October 15, 2004 8:02 PM Subject: Re: [Repeater-Builder] Diamond X500
[Repeater-Builder] Tx Audio
Does anyone have experience with a problem I am having with my repeater project? I don't think I'm trying to do anything terribly unique here, but has anyone found a good way to combine a fixed microphone audio source with a repeater controller? Here is what I am trying to do: I am running my Johnson PPl 6060 on 440 (which I was able to tune up quite nicely thanks to the feedback of this messageboard) with a CSI 9800 phone interconnect / repeater controller unit. I tried just putting a both audio sources into the microphone pin of the radio, but it does not work. When I have just the microphone hooked up, the audio sounds great, but when I have the controller wired in as well (to the same transmit audio point) the audio from the microphone goes to zero. The controller audio, however, stays the same. Here is my question: is the low-level audio from the microphone being dissipated by going into the controller instead of being transmitted through the radio? Should I then be able to put a resistor (100K-ohm?) in-line with the controller audio, and then splice in the microphone audio after this point? I should just be able to turn up the TX pot on the controller and have mixed audio, am I right? I was reading in the controller manual, where it said: If Mic loading occurs, install a resistor in series with the audio out lead, and cut JP-3. The resistor should be large enough to prevent Mic Loading, but small enough to achieve adequate land to mobile audio. Try a 100K as a first cut. could this solve my problem? Thanks, Dayne Olmstead KD7JAH 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] Power monitor question
Hey guys, quick question for you. I'm sure someone has done this before. I had to make an emergency call to a mountaintop repeater site this evening for one of the local EMS squads because the link system stopped working. It turns out the power supply breaker popped due to a surge and they have been running on battery backup for the last 3 days and they finally died. What I'm looking for is some type of stand alone power monitor to let me know when the repeater is on battery backup. The controllers I use for my ham gear have this built in, as do most ham controllers, and will change the courtesy tone if it is on battery backup. However, this system is using a couple of Motorola mobiles and a RICK unit. What I am looking for is something I can interface into the 16 pin accy connector that will key one of the radios like once a minute and send a beep out so the listeners would be made aware the system has lost AC power for some reason. Anyone know of any devices like that? TIA to all. Kevin K2KMB 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: Syntor X9000 Low Band.....
John, First, what kind of area are you trying to cover? Are you rural, suburban. metro? Low-band works great in the boonies but not very well in urban canyons. High power is very easy to come by on six and ten meters. 100 miles+ mobile to base is common here in the flatlands. 300 watt bases are cheap, relative to hi-V or UHF. (In the 50's the local State Police ran 3kw. on 39 mhz.) Some ARES/RACES units use two meters and 440 for in-county work and use six meters for regional/state-wide communication. Six has the advantage of not being very crowded and works great point-to-point. The X 9000 usually will cover both six and ten meters at the same time. Antennas that do may be an issue, though. Since the receiver has such a wide front end (even though it does have a remarkable dynamic range), it probably would not be the best choice for repeater use. A narrow band front end is usually an asset on a repeater. Then again if you have many of them give it a try. The transmitter is usually good for 100 watts but not in continuous repeater service. You'd want to back way off on power out and still need to blow a lot of air over it. You would need two radios for a repeater, one to receive and one to transmit. If it was up to me I think I'd use some of the Syntor X 9000's for trading stock for a Micor or Mastr II low-band base station. Check out what X 9000s bring on ebay. Good luck, Al, K9SI Date: Sun, 17 Oct 2004 17:20:13 - From: John Everson [EMAIL PROTECTED] Subject: Syntor X 9000 Low Band 6m-10m Rpt? Hello to the group. Can anyone tell me if the Syntor X 9000 will actually cover 6 and 10 meters at the same time (not duplexing) without serious degradation on tx or rx performance? Also, someone is trying to tell me that these radios have an automatic antenna tuning unit in them??? Our leader has programmed several and they do seem to work, allthough, I haven't put one on the service monitor to see what the real performance is like. Additionally, has anyone ever used a pair of these to make a repeater? Our ARES group just recieved a bunch of these (most without control cables) and our zealous leader thinks we need to move to Low Band. I am just looking for some facts before I shoot my mouth off. I am trying to convince the ARES group that we need to stick to our VHF and UHF interests and not complicate things further with low band. A friend and I have 6 meter box that works extremely well but I still think we should focus on shorter wavelengths. ;-) Feel free to reply off list if you wish. Thanks in advance. John Eversonab6li 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] Power monitor question
Sounds like that kind of duty cycle would just help the battery run down more quickly. You might consider that type of automatic signal may not be appropriate for the service. Maybe you just need a beep after repeater activity? Maybe something with a 555 timer could be built up? Steve - Original Message - From: Kevin Bednar [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, October 17, 2004 9:22 PM Subject: [Repeater-Builder] Power monitor question Hey guys, quick question for you. I'm sure someone has done this before. I had to make an emergency call to a mountaintop repeater site this evening for one of the local EMS squads because the link system stopped working. It turns out the power supply breaker popped due to a surge and they have been running on battery backup for the last 3 days and they finally died. What I'm looking for is some type of stand alone power monitor to let me know when the repeater is on battery backup. The controllers I use for my ham gear have this built in, as do most ham controllers, and will change the courtesy tone if it is on battery backup. However, this system is using a couple of Motorola mobiles and a RICK unit. What I am looking for is something I can interface into the 16 pin accy connector that will key one of the radios like once a minute and send a beep out so the listeners would be made aware the system has lost AC power for some reason. Anyone know of any devices like that? TIA to all. Kevin K2KMB 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] Re: Diamond X500
I think the problem with the X-500's is they are already too tight. I have experience with 3 of them and was not too impressed. One was waterproofed at all joints with industrial Dow silicone rubber and cleaner it was up a couple of years and when taken down and taken apart it was apparent moisture had either migrated through the fiberglass or as I suspect water vapor in the air just condensed on the inside of the radome due to differing temperatures between inside and outside of the radome (dew point) kind of like when you see condensation forming on your windows in the winter time. I suspect the radome chamber is just too tight and does not allow enough ventilation to dissipate the condensation once it has formed. That and the stupid foam water sponges those io-dots put in there. I think the fix would be to drill a hole up buy the top (and or bottom) put a cap so water cant get back in and paint the thing black so you would get some solar help in drying it out. Or take the antenna out of the radome and put it in a station master shell. I have some other stories about x-500's (all not good) [Original Message] From: Coy Hilton [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Date: 10/16/2004 11:03:25 PM Subject: [Repeater-Builder] Re: Diamond X500 Hi Steve, I'm going up to the site Sunday and I will likely not pressureize it, But I will be thinking about the suggestion for a good while. I would consider sense the half inch hardline is only thirty feet long to the sky hook, running a small airline to it and using a aquerium (?) pump to pressurize it. BUT I Will likely use some Scotch brand tape that I have that fuses to it self to water proof the fiber glass joints after drying it out with a trusty hair dryer. I wish I had about 5 pounds of Silica JELL. Oh, while I was consulting for ANDREW Corp, some years ago I had a chance to take a look at their sweet little HELIAX pressureizer. It had a small GATES compresser mounted on a chassis and sucked air in through two chambers of Silica Jell and pumped it into the hard line. It worked really well. 73 AC0Y --- In Repeater-Builder@yahoogroups.com, Steve Grantham [EMAIL PROTECTED] wrote: Coy.. I was just joking.. However, if you could get an air connector mounted on the antenna base somewhere and put pressure on it, then you could soap the antenna and look for bubbles. Once you get the antenna sealed, then perhaps you could charge it, or at least let it weep through the air fitting if it was positioned properly to act as a drain. Tight transmission lines are often pressurized with nitrogen. Microwave and cellular lines and antennae are often pressurized using dry air. A dehydrator, a compressor with a dryer, won't run out and need replacement like a nitrogen bottle would, and is more suited to leaky antenna systems. As long as you keep positive pressure on the line... no worrys... concerning water ingress anyway. Seriously, I don't know much about the Diamond X500 (dimensions, etc.), but if you can put an air fitting on it, then you can probably fix it.. Perhaps you can go to the auto parts or the tire store to get an air fitting. They pressurize tires, don't they? (Let me know if you spin balance it.. hi hi!) Steve - Original Message - From: Coy Hilton [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, October 15, 2004 8:19 PM Subject: [Repeater-Builder] Re: Diamond X500 Steve, Great thinking !! sounds like something a thinker, or engineer would come up with. I would even take this one under advisement. 73 AC0Y --- In Repeater-Builder@yahoogroups.com, Steve Grantham [EMAIL PROTECTED] wrote: As long as we're engineering solutions... (hi hi!..) How about using an air-dielectric cable and pressurizing the Diamond radome with an inter-connecting jumper (hose) using a dehydrator... Positive air pressure, air egress, can prevent water ingress.. 73 HI! Steve - Original Message - From: Brent [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, October 15, 2004 8:02 PM Subject: Re: [Repeater-Builder] Diamond X500 Good one Neil, or use it for a Rain gauge. j/k I have tried to keep moisture out of those antenna and have had no luck, do to them no having a good vent hole at the bottom to release any moisture. So i drilled a little hole near the bottom of the antenna and than installed a small hose like a fishing tank pump hose about 4-5 long and routed it towards the bottom for a drain. it seems to have helped.. Brent - Original Message - From: Neil McKie [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Friday, October 15, 2004 7:54 PM Subject: Re:
Re: [Repeater-Builder] Power monitor question
At 07:22 PM 10/17/04, you wrote: Hey guys, quick question for you. I'm sure someone has done this before. I had to make an emergency call to a mountaintop repeater site this evening for one of the local EMS squads because the link system stopped working. It turns out the power supply breaker popped due to a surge and they have been running on battery backup for the last 3 days and they finally died. What I'm looking for is some type of stand alone power monitor to let me know when the repeater is on battery backup. The controllers I use for my ham gear have this built in, as do most ham controllers, and will change the courtesy tone if it is on battery backup. However, this system is using a couple of Motorola mobiles and a RICK unit. What I am looking for is something I can interface into the 16 pin accy connector that will key one of the radios like once a minute and send a beep out so the listeners would be made aware the system has lost AC power for some reason. Anyone know of any devices like that? TIA to all. Kevin K2KMB Don't have a RICK manual handy. Do you know where I can find a PDF? Anyway, build up a beep device (or take an old tone-burst board) and wire it so that when a relay drops out the beep occurs during the carrier delay time. Then enable the beep with the contacts of a reed relay. Then connect the reed relay coil to a wall wart power pack plugged into the same AC line as the repeater. Get me a RICK manual and I will engineer the whole thing for you. Mike WA6ILQ 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] Test - Please delete
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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Tx Audio
Use a couple of 100k pots and make a simple resistive mixer. Easier to fine tune! - Original Message - From: stanleyradio [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, October 17, 2004 11:55 PM Subject: [Repeater-Builder] Tx Audio Does anyone have experience with a problem I am having with my repeater project? I don't think I'm trying to do anything terribly unique here, but has anyone found a good way to combine a fixed microphone audio source with a repeater controller? Here is what I am trying to do: I am running my Johnson PPl 6060 on 440 (which I was able to tune up quite nicely thanks to the feedback of this messageboard) with a CSI 9800 phone interconnect / repeater controller unit. I tried just putting a both audio sources into the microphone pin of the radio, but it does not work. When I have just the microphone hooked up, the audio sounds great, but when I have the controller wired in as well (to the same transmit audio point) the audio from the microphone goes to zero. The controller audio, however, stays the same. Here is my question: is the low-level audio from the microphone being dissipated by going into the controller instead of being transmitted through the radio? Should I then be able to put a resistor (100K-ohm?) in-line with the controller audio, and then splice in the microphone audio after this point? I should just be able to turn up the TX pot on the controller and have mixed audio, am I right? I was reading in the controller manual, where it said: If Mic loading occurs, install a resistor in series with the audio out lead, and cut JP-3. The resistor should be large enough to prevent Mic Loading, but small enough to achieve adequate land to mobile audio. Try a 100K as a first cut. could this solve my problem? Thanks, Dayne Olmstead KD7JAH 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] Direct TV type dish?
I Roger that. THe Dish 500 reflector is not adiquate enough, that is why this passed weekend I placed the LNB onto a solid ten foot reflector. During the t-storms is when I need the feed the most. Did the same to the Directway dis as well. Got to remain on line no mater the enviroment. I wished I was authorized to use that internet for personal useage. Ed Steve Grantham wrote: At this frequency, microwaves don't propagate through rain water very well.. Thunderstorms have lots of moisture suspended in their clouds. When the clouds move out of the line-of-sight path from the satellite to your receiver dish, the signal comes back. Steve - Original Message - From: Mr. Edgar McKinney [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, October 16, 2004 4:48 PM Subject: Re: [Repeater-Builder] Direct TV type dish? Ken Arck wrote: At 10:42 AM 10/15/2004 -0400, you wrote: Usually for DISH network, its RG6. I do not understand why. its a high loss coax. --Because it's cheap! Did you ever take a look at the output of the LNB? There is tons of level so it can afford the loss! Ken I did and still have fade when a storm comes. Signal strength reads 100 - 109 percent on a 500 system. Ed 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] Power monitor question
The Motorola Micor Station with the battery charging / float option has a built-in 'beep' circuitry that beeps when the station is running on battery. When you hear that tell-tale 'beep' during every transmission, you know you are on battery. You could use a CTCSS tone instead - the only time the tone is transmitted is when the station is on battery. There, you have two suggestions, Hope this helps, Neil - WA6KLA Steve Grantham wrote: Sounds like that kind of duty cycle would just help the battery run down more quickly. You might consider that type of automatic signal may not be appropriate for the service. Maybe you just need a beep after repeater activity? Maybe something with a 555 timer could be built up? Steve - Original Message - From: Kevin Bednar [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, October 17, 2004 9:22 PM Subject: [Repeater-Builder] Power monitor question Hey guys, quick question for you. I'm sure someone has done this before. I had to make an emergency call to a mountaintop repeater site this evening for one of the local EMS squads because the link system stopped working. It turns out the power supply breaker popped due to a surge and they have been running on battery backup for the last 3 days and they finally died. What I'm looking for is some type of stand alone power monitor to let me know when the repeater is on battery backup. The controllers I use for my ham gear have this built in, as do most ham controllers, and will change the courtesy tone if it is on battery backup. However, this system is using a couple of Motorola mobiles and a RICK unit. What I am looking for is something I can interface into the 16 pin accy connector that will key one of the radios like once a minute and send a beep out so the listeners would be made aware the system has lost AC power for some reason. Anyone know of any devices like that? TIA to all. Kevin K2KMB 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] Icom rp4020
Ken Arck wrote: At 02:24 PM 10/15/2004 -0500, you wrote: It Worked for Me , if You like I can E-Mail it directly. ---That's really wierd. This particular pdf isn't liked by my Acrobat (4.0) at all. It reports There was a problem reading this document(9). The file contains information not understood by the viewer I've never run into this before and other pdf's work just fine. Maybe I need to upgrade? Ken Likely-it's on V6, although 5 is the last one that will work with win98/IE5. You have to have IE6 for Reader 6 to install, and IE6 doesn't work well in 98SE or prior. -- 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/
[Repeater-Builder] Clear Speech Speaker
Is this unit still available? I can find info about it on the web but nothing about Am-Comm or where one can be purchased. Doug VA7DD 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] Power monitor question
At 09:54 PM 10/17/04, you wrote: Sounds like that kind of duty cycle would just help the battery run down more quickly. You might consider that type of automatic signal may not be appropriate for the service. Maybe you just need a beep after repeater activity? Maybe something with a 555 timer could be built up? Please don't use a 555 - they output square waves which sounds bad and if the TX audio filtering / deviation control isn't what it should be they will cause adjacent channel interference. A simple sine wave audio oscillator is not that difficult - a transistor, a audio transformer, and a few resistors and capacitors. In my initial response I didn't suggest keying the TX PL encoder simply because that may already be in use, and using it for a power fail alert requires hooking some kind of an alarm to a PL decoder somewhere. My offer to engineer a real solution still stands - just get me a RICK manual or a copy. Mike WA6ILQ 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: [SPAM] - Re: [Repeater-Builder] Power monitor question - Email found in subject
Thanks Mike. I think I may already have a solution and will more than likely replace the RICK with a different controller that has a power fail monitor already on it. Kevin -Original Message- From: Mike WA6ILQ [mailto:[EMAIL PROTECTED] Sent: Monday, October 18, 2004 2:46 PM To: Repeater-Builder@yahoogroups.com Subject: [SPAM] - Re: [Repeater-Builder] Power monitor question - Email found in subject At 09:54 PM 10/17/04, you wrote: Sounds like that kind of duty cycle would just help the battery run down more quickly. You might consider that type of automatic signal may not be appropriate for the service. Maybe you just need a beep after repeater activity? Maybe something with a 555 timer could be built up? Please don't use a 555 - they output square waves which sounds bad and if the TX audio filtering / deviation control isn't what it should be they will cause adjacent channel interference. A simple sine wave audio oscillator is not that difficult - a transistor, a audio transformer, and a few resistors and capacitors. In my initial response I didn't suggest keying the TX PL encoder simply because that may already be in use, and using it for a power fail alert requires hooking some kind of an alarm to a PL decoder somewhere. My offer to engineer a real solution still stands - just get me a RICK manual or a copy. Mike WA6ILQ 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] Power monitor question
Using 1 transisitor and a few resistors and capacitors will do as well. Neil - WA6KLA Mike WA6ILQ wrote: At 09:54 PM 10/17/04, you wrote: Sounds like that kind of duty cycle would just help the battery run down more quickly. You might consider that type of automatic signal may not be appropriate for the service. Maybe you just need a beep after repeater activity? Maybe something with a 555 timer could be built up? Please don't use a 555 - they output square waves which sounds bad and if the TX audio filtering / deviation control isn't what it should be they will cause adjacent channel interference. A simple sine wave audio oscillator is not that difficult - a transistor, a audio transformer, and a few resistors and capacitors. In my initial response I didn't suggest keying the TX PL encoder simply because that may already be in use, and using it for a power fail alert requires hooking some kind of an alarm to a PL decoder somewhere. My offer to engineer a real solution still stands - just get me a RICK manual or a copy. Mike WA6ILQ 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] Clear Speech Speaker
I think Am-Comm went out of business. Neil - WA6KLA Davies, Doug A FOR:EX wrote: Is this unit still available? I can find info about it on the web but nothing about Am-Comm or where one can be purchased. Doug VA7DD 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] Mobile Duplexer Question
Iacquireda Phelps Dodge 636 3/3 mobile duplexer tuned for TX freq. of 163.8xxx and a RX freq. of 167.5xxx. What I was wondering was if this could be tuned down into the ham band with any success for a mobile repeater using some hand held radios. I was looking in my Tessco catalog and saw that this unit resembles the RFS Celwave 636-6A-3/3 with specifications of: Freq. range 164-174 Mhz, max power 50 watts, min. separation 4.5 Mhz, insertion loss 1.2 db, isolation 80 db both TX and RX. I then looked at the the RFS Celwave 636-6A-1/3, which is exactly the same aappearanceand specs. except for the freq. range, which is 144-154 Mhz.That made me question, are these duplexers the same onlytuned from the factory differently giving it the slightly different model number. Or are they completely different inside and not worth the trouble of retuning. The tuning rod are sticking out a good ways, about an inch. So maybe there is some room for adjustment. If anyone has messed around with a ssimilarunit or has any info on this unit and could share their stories of success or other wise (if I should just toss it as useless junk) I would greatly appreciate the info. Thanks for all the good info on this list, T.J. 73 KC8LTS 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 the Yahoo! Terms of Service.
[Repeater-Builder] preamp question
Does anyone ever consider using a preamp (ARR GaAsFET) on 440 with only a 6-cavity notch duplexer (Cellwave)? I know that this makes the receiver susceptable to desense from other interference, but my site is so extremely remote that my only concern is just keeping my own Tx out. I was just wondering if for an extremely quiet site, a bandpass filter between the notches and the preamp is worth the added insertion loss. Thanks, Dayne Olmstead KD7JAH 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] Power monitor question
I forgot to mention the circuit I suggested below is known as a phase shift oscillator. Neil Neil McKie wrote: Using 1 transisitor and a few resistors and capacitors will do as well. Neil - WA6KLA Mike WA6ILQ wrote: At 09:54 PM 10/17/04, you wrote: Sounds like that kind of duty cycle would just help the battery run down more quickly. You might consider that type of automatic signal may not be appropriate for the service. Maybe you just need a beep after repeater activity? Maybe something with a 555 timer could be built up? Please don't use a 555 - they output square waves which sounds bad and if the TX audio filtering / deviation control isn't what it should be they will cause adjacent channel interference. A simple sine wave audio oscillator is not that difficult - a transistor, a audio transformer, and a few resistors and capacitors. In my initial response I didn't suggest keying the TX PL encoder simply because that may already be in use, and using it for a power fail alert requires hooking some kind of an alarm to a PL decoder somewhere. My offer to engineer a real solution still stands - just get me a RICK manual or a copy. Mike WA6ILQ 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] Mobile Duplexer Question
T.J. wrote: I acquired a Phelps Dodge 636 3/3 mobile duplexer tuned for TX freq. of 163.8xxx and a RX freq. of 167.5xxx. What I was wondering was if this could be tuned down into the ham band with any success for a mobile repeater using some hand held radios. I was looking in my Tessco catalog and saw that this unit resembles the RFS Celwave 636-6A-3/3 with specifications of: Freq. range 164-174 Mhz, max power 50 watts, min. separation 4.5 Mhz, There's your answer right there-4.5 Mhz is bigger than the entire 2M ham band. No, it's not practical to rebuild them to handle a narrower split. If you want a portable/mobile repeater, you should look towards UHF. The in/out spacing on 2M doesn't make it easy to do anything portable. On UHF however, the whole thing, including duplexer and power supply, can be put in a desktop-size box, about the size of a full size HF rig. -- 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] Mobile Duplexer Question
Our local ARES group put together a portable 2m repeater... it is a 6 ft rack cabinet disguised as a fly-away case. Un-plug the power, and feedlines, buckle the sides on and you are ready to go... just don't forget the 6 guys needed to move it. The Vertex can be re-programmed with a laptop... but the cans are another matter. Crude tuning can be done with a ht and SWR/power meter. We used this same repeater when the fruit-loops flew that airplane into the Pentagon. It performed very well, just not my idea of portable. I saw several FEMA boxes that had been retired on eBay a while back.. minus the radios. You might try looking in the industrial radio section for a cheap building block to start with. The box was approx 14 inches square, and about 12 inches deep. Good luck on your project.. mike -Original Message- From: Jim B. [mailto:[EMAIL PROTECTED] Sent: Monday, October 18, 2004 3:45 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mobile Duplexer Question T.J. wrote: I acquired a Phelps Dodge 636 3/3 mobile duplexer tuned for TX freq. of 163.8xxx and a RX freq. of 167.5xxx. What I was wondering was if this could be tuned down into the ham band with any success for a mobile repeater using some hand held radios. I was looking in my Tessco catalog and saw that this unit resembles the RFS Celwave 636-6A-3/3 with specifications of: Freq. range 164-174 Mhz, max power 50 watts, min. separation 4.5 Mhz, There's your answer right there-4.5 Mhz is bigger than the entire 2M ham band. No, it's not practical to rebuild them to handle a narrower split. If you want a portable/mobile repeater, you should look towards UHF. The in/out spacing on 2M doesn't make it easy to do anything portable. On UHF however, the whole thing, including duplexer and power supply, can be put in a desktop-size box, about the size of a full size HF rig. -- Jim Barbour WD8CHL 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] Re: Clear Speech Speaker
AM-COMM is no more. However, Bob Heil at Heil Sound, has picked up the licensing for the product and is going to be putting out an improved version. See the announcment at: http://www.heilsound.com/amateur/announcements.htm Dick---N7ZH --- In Repeater-Builder@yahoogroups.com, Davies, Doug A FOR:EX [EMAIL PROTECTED] wrote: Is this unit still available? I can find info about it on the web but nothing about Am-Comm or where one can be purchased. Doug VA7DD 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] Re: Clear Speech Speaker
Thanks for the info, Rich and others. Much appreciated. Doug VA7DD 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] TS-32 modification
Recently someone posted a modification to the TS-32 tone encoder/decoder which would result in faster decode time. This same info is on the Repeater Builder site. However, I have a conflict between the Communications Specialists parts list and the information provided on the Repeater Builder site. My spec sheet says that R-12 is 150K and that R-19 is 220K. The modification calls for: R-12 (110K) to change to 80 K or 100K R-19 (150K) to change to 220K or 270K Can anyone clarify this information? Chuck WB2EDV 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/
