[Repeater-Builder] WTB: Vibrasponder AND Vibrasender reeds
I am also in need of some reeds. 77hz Email direct at kd4ydc at juno.com Thanks, Robert Try Juno Platinum for Free! Then, only $9.95/month! Unlimited Internet Access with 1GB of Email Storage. Visit http://www.juno.com/value to sign up today! 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] WTB: Vibrasponder AND Vibrasender reeds
A part number for the reeds you need would be a big help. 73, Rich Rich Poczkalski WB2DSS [EMAIL PROTECTED] In God we trust, all others we run NCIC * Two rules for success in life: 1) Don't tell people everything you know. 2) * - Original Message - From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, February 28, 2006 6:06 AM Subject: [Repeater-Builder] WTB: Vibrasponder AND Vibrasender reeds I am also in need of some reeds. 77hz Email direct at kd4ydc at juno.com Thanks, Robert Try Juno Platinum for Free! Then, only $9.95/month! Unlimited Internet Access with 1GB of Email Storage. Visit http://www.juno.com/value to sign up today! 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] ELT Receiver on Repeater
For some strange reason I cannot access their web page are they down 4 updates ? I did all the settings check. mark holman Paul Yonge wrote: Hamtronics has an R121 Aviation Receiver that you can read about at www..hamtronics.com/r121.htm. They aren't exactly giving them away with the module at $209, the module in a cabinet with connectors at $299, and a "complete" unit at $495. This sounds like such a great idea, you'd think someone would encourage it by putting together a more affordable unit without any bells or whistles. Paul "Noah" Yonge, CBT W2ARK WQDY219 MIDLAKES REPEATER [EMAIL PROTECTED] On Feb 27, 2006, at 6:42 PM, Daron J. Wilson wrote: I had one, wish now I'd never sold it. The company doesn't make it anymore as far as I know. It was made by Ltronics, and was a simple rack mount receiver with a signal strength meter, and decoder circuit that would close a relay after hearing the 'yelp' of an ELT/EPIRP for a few minutes or so. I had it interfaced to my repeater in a manner that just put the audio on the repeater IF there was an alert. Anyway, you may have to get a receiver and build something to decode the yelp. If you find a simple way, I'd be interested in adding it again to my repeater network. Good luck N7HQR -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- [EMAIL PROTECTED]] On Behalf Of Alexander N Tubonjic Sent: Monday, February 27, 2006 3:28 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] ELT Receiver on Repeater Hello All, I remember reading somewhere (I think in an ARRL Handbook) about a project to install an ELT (Emergency Locater Transmitter) reciever at a repeater site and link it into the repeater. I quess every time a signal was received some kind of tone or something came over the repeater alerting users that an ELT was going off. I am in Civil Air Patrol and think this would be something nifty to have on my repeater. If anyone has built and/or used something like this I would like to hear from you, thanks. Alexander 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/ -- MZ 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. begin:vcard fn:Mark A. Holman n:Holman;Mark A. email;internet:[EMAIL PROTECTED] title:Webmaster, IT Student note;quoted-printable:IT, Student Member IEEE, Life Member ARRL, Assoc. Member SBE, CRO, ARRL= VE=0D=0A= Welcome to the Snowy stuff of Michigan=0D=0A= x-mozilla-html:TRUE url:http://www.ab8ru.org version:2.1 end:vcard
Re: [Repeater-Builder] ELT Receiver on Repeater
never mind I just accessed. mark h. Paul Yonge wrote: That obviously should have read Hamtronics has an R121 Aviation Receiver that you can read about at www.hamtronics.com/r121.htm. My spell-checker doesn't pick up on double dots on URLs. Noah W2ARK Yahoo! Groups Links -- MZ� 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/ begin:vcard fn:Mark A. Holman n:Holman;Mark A. email;internet:[EMAIL PROTECTED] title:Webmaster, IT Student note;quoted-printable:IT, Student Member IEEE, Life Member ARRL, Assoc. Member SBE, CRO, ARRL= VE=0D=0A= Welcome to the Snowy stuff of Michigan=0D=0A= x-mozilla-html:TRUE url:http://www.ab8ru.org version:2.1 end:vcard
[Repeater-Builder] Re: ELT Receiver on Repeater
Anyway, you may have to get a receiver and build something to decode the yelp. If you find a simple way, I'd be interested in adding it again to my repeater network. Why would you need more than a receiver, and the equivalent of a VOX ckt? If you have carrier on 121.5, and there's audio persisting for more than a few seconds, then it's likely an ELT. If not, listening to the audio for a few seconds will resolve that. 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] ELT Receiver on Repeater
Two dots don't work... try one: http://www.hamtronics.com/r121.htm 73, Tony W4ZT Mark A. Holman wrote: For some strange reason I cannot access their web page are they down 4 updates ? I did all the settings check. mark holman Paul Yonge wrote: Hamtronics has an R121 Aviation Receiver that you can read about at www..hamtronics.com/r121.htm http://www..hamtronics.com/r121.htm. They aren't exactly giving them away with the module at $209, the module in a cabinet with connectors at $299, and a complete unit at $495. This sounds like such a great idea, you'd think someone would encourage it by putting together a more affordable unit without any bells or whistles. Paul Noah Yonge, CBT W2ARK WQDY219 MIDLAKES REPEATER [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] On Feb 27, 2006, at 6:42 PM, Daron J. Wilson wrote: I had one, wish now I'd never sold it. The company doesn't make it anymore as far as I know. It was made by Ltronics, and was a simple rack mount receiver with a signal strength meter, and decoder circuit that would close a relay after hearing the 'yelp' of an ELT/EPIRP for a few minutes or so. I had it interfaced to my repeater in a manner that just put the audio on the repeater IF there was an alert. Anyway, you may have to get a receiver and build something to decode the yelp. If you find a simple way, I'd be interested in adding it again to my repeater network. Good luck N7HQR -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder@yahoogroups.com [mailto:Repeater- [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]] On Behalf Of Alexander N Tubonjic Sent: Monday, February 27, 2006 3:28 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] ELT Receiver on Repeater Hello All, I remember reading somewhere (I think in an ARRL Handbook) about a project to install an ELT (Emergency Locater Transmitter) reciever at a repeater site and link it into the repeater. I quess every time a signal was received some kind of tone or something came over the repeater alerting users that an ELT was going off. I am in Civil Air Patrol and think this would be something nifty to have on my repeater. If anyone has built and/or used something like this I would like to hear from you, thanks. Alexander Yahoo! Groups Links -- MZ� YAHOO! GROUPS LINKS * Visit your group Repeater-Builder http://groups.yahoo.com/group/Repeater-Builder on the web. * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service http://docs.yahoo.com/info/terms/. 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: A sad story
--- In Repeater-Builder@yahoogroups.com, Eric Lemmon [EMAIL PROTECTED] wrote: Lemme see... Doesn't the TLE amplifier have an internal circulator and dummy load? Not that I can see. I could be wrong. If this PA was pumping 100 watts into an antenna system that was a very poor match due to water intrusion, I'd expect that the circulator was putting a lot of power into the load- which may now be a crispy critter. The wet antenna never did show a high SWR, I suspect it failed in dummy-load mode. I expect to open it up and find fried components. The internal construction of the comet GP-9 is pretty dissapointing. It and/or the circulator may have damage, and may be causing the smell. I'm pretty sure I don't have one, unless it's well hidden. I am also really leery of that Comet diplexer- never felt good about using such devices at a remote site. It's not all that remote, it's just a pita for me to get to. And, there's no choice, if we want to do VHF and UHF, we have to do it through one antenna. So.. This is a real head-scratcher! Please share your epilogue with the list, when you get there... I will. I'm hoping that whatever is damaged is something that I can repair/replace. 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: A sad story
At 2/28/2006 07:47, you wrote: I am also really leery of that Comet diplexer- never felt good about using such devices at a remote site. It's not all that remote, it's just a pita for me to get to. And, there's no choice, if we want to do VHF and UHF, we have to do it through one antenna. So.. I've never had any problems with the leadless Comet/Diamond diplexers, but if you really want a good one I recommend the TX/RX crossband coupler. Pricey, but the insertion loss is darn near zero. 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/
Re: [Repeater-Builder] OT RED CROSS
Jim B. wrote: "The Homeland Security Department has requested and continues to request that the American Red Cross not come back into New Orleans." Not true. The American Red Cross has a Congressional mandate to do what they do. It would require an act of Congress to do prevent them from assisting. === Jim Barbour 10yrs with Greater Cleveland Red Cross Better look again, http://www.redcross.org/faq/0,1096,0_682_4524,00.html 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.
[Repeater-Builder] r100 repeater tail
hello i have a r100 uhf rptr an it is setup for no rptr tail after unkeying. what do i have to do on the controller board to get the original 2second default tail back ? thanks tom 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] motorola r100 rptr
hello i have a uhf25watt r 100 motorola repeater which has been set up for no repeater tail at end of transmitting. i want to put it back to the original 2 second default setup could someone tell me the procedure involved on the controller board as i see they soudered a few new electronic parts on it thanks tom 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: A sad story
Well, I thought you said that you changed cabling and that's when this started happening. Take it one step at a time. Starting at the transmitter, take a jumper and check VSWR to a dummy load, then check loss at the end of the jumper. Add one can terminated with the dummy load and check VSWR and then loss again. Keep going till you find where your transmit signal goes haywire. If your VSWR is good, I'd suspect somehow you've got some real lossy cables in the mix. Divide and conquer. Chuck WB2EDV Dave VanHorn wrote: --- In Repeater-Builder@yahoogroups.com, Chuck Kelsey [EMAIL PROTECTED] wrote: Sounds like a bad cable. Both the can-can cable and the can-tee cable are heating. Why would they suddenly start heating like that? This duplexer was operating within it's ratings, and the SWR is very low, so I'm puzzled as to why things went so badly suddenly wrong. 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: Antenna advice
The sinclair requires no modification at all to work on any frequency between 138 and 174 Mhz. It is a good DC grounded wideband antenna. The DB products one I can not comment on. Dave Cameron VE7LTD --- In Repeater-Builder@yahoogroups.com, n7zef [EMAIL PROTECTED] wrote: I was recently given 2 antennas, and I need to know if they could be useful for 2 meters or in the scrap yard. One is a Sinclair 2 bay antenna Model # SRL210C2HD*2. Sticker on it says the frequency os 160.860. The other is unknown. It is a 4 bay antenna with just the elements and phasing harness, no boom. Each element measures 34 in total length OD, 2.75 in width OD, 1/2 inch dia tubing. The wording stamped in the phasing harness says D.B. Products. Like I said, I would like to know if these could be made to work on 2 meters... 73 Mike - N7ZEF 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] OT RED CROSS
It is easy to criticize the Red Cross when you aren't a participant or have had a family member who is. My step son took leave from his administrative job in a comfortable Connecticut hospital to work as a volunteer for two weeks in a shelter located in a Slidell, LA high school gymnasium, just north of the lake. They were short handed, had less than two days reserves of water and food, no air conditioning, no showers, ONE National Guardsman for security, NO Amateur Radio communications volunteers and HUNDREDS of homeless people that were trying to contact family or friends while barely managing to survive. Take a walk in his shoes before you toss too many rocks... but if you're going to toss them, toss them at me, not him... he was doing the best he could with what he had. 73, Tony W4ZT Kevin Custer wrote: Jim B. wrote: The Homeland Security Department has requested and continues to request that the American Red Cross not come back into New Orleans. Not true. The American Red Cross has a Congressional mandate to do what they do. It would require an act of Congress to do prevent them from assisting. === Jim Barbour 10yrs with Greater Cleveland Red Cross Better look again, http://www.redcross.org/faq/0,1096,0_682_4524,00.html 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: Antenna advice
Let me see if I can help with the DB Antenna, which from the size reads like something for the VHF Range. We've done the work for you... go to the repeater builder web page www.repeater-builder.com and look at the Decibel Antenna drawings that others and myself have provided. The VHF Antennas from 138-174MHz were made in three or four models that covered smaller portions (band segements) within the above listed frequency range. You'll see something like DB-224A, DB-224B and DB-224C as examples of them mentioned. You'd first want to ID what model you have and then figure out if it would work for your needs. The various models do go out of band a bit, but I've not found the VHF antennas to be as usable out of band as the UHF versions seem to be. The physical size of the dipole is the better indicator of where the antenna operates (band segment). If the DB Ant is another 160 MHz model ... I would say it's not going to be easy to mod and use it for 146MHz (2 meter) operation. If you look at the DB Antenna drawings we've provided, you'll notice the physical size of the Dipole Elements change quite a bit when moving from the 138-150 segment vhf antenna up to the 150-162 segment (frequecies ranges may not be the exact values, used for the example only). The coax harness also changes for the band segments. I've found it not so easy to get a 150-160MHz and higher band segement to work well down into the ham band. Since the dipole elements change size at the 150 MHz breakpoint it's not really easy to (increase the size of...) resize/mod the Dipoles Elements without major metal work. You then have to make/copy or buy a replacement coax harness for the lower band segment once you rework the Dipole sizes . Life goes on... hope that helps a bit. cheers, skipp n7zef [EMAIL PROTECTED] wrote: I was recently given 2 antennas, and I need to know if they could be useful for 2 meters or in the scrap yard. One is a Sinclair 2 bay antenna Model # SRL210C2HD*2. Sticker on it says the frequency os 160.860. The other is unknown. It is a 4 bay antenna with just the elements and phasing harness, no boom. Each element measures 34 in total length OD, 2.75 in width OD, 1/2 inch dia tubing. The wording stamped in the phasing harness says D.B. Products. Like I said, I would like to know if these could be made to work on 2 meters... 73 Mike - N7ZEF 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] motorola r100 rptr
Tom, I have the R100 manual in PDF format on my FTP server at ftp://n9wys.homeftp.net You'll be able to download the manual from there. Without knowing what components were added, it's a bit difficult to troubleshoot via e-mail. :-) Contact me off list for access - I don't allow anonymous connections into my ftp server. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of radiocop83 Sent: Tuesday, February 28, 2006 9:18 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] motorola r100 rptr hello i have a uhf25watt r 100 motorola repeater which has been set up for no repeater tail at end of transmitting. i want to put it back to the original 2 second default setup could someone tell me the procedure involved on the controller board as i see they soudered a few new electronic parts on it thanks tom 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/ attachment: winmail.dat
[Repeater-Builder] Beam v. Folded Dipole
My GMRS repeater will be at the point of a 30 - 40 degree V formed by two mountain ranges about 500' higher than my location. Fortunately, the town that I want to cover is in the open part of the V and about 12 miles away. Unfortunately, there is a mountaintop about the same elevation as my repeater about halfway between the town and me, but that's life in the mountains. The question is: since I'm trying to cover a 30 - 40 degree area, a five or six element beam fits the bill and I already have the beam. But, would a four element folded dipole with the elements set up for a cardioid pattern (let's pretend same gain, roughly the same horizontal coverage area) work better because of more iron up on the tower? I don't have a 4 el. antenna, so I'm leaning toward the beam. Thoughts? Howard WB4GUD 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: Help With EF Johnson CR-1000 Repeater
Thanks for the help Paul: Originally it was on 461.375, which appears to be from the factory. Both the exiter and receiver look to be a cast mobile radio chassis remounted for rack use with unnecesscary circuitry not installed. All looks original and non modified. It's very clean. The receiver has a row of 5 helicals then three more used in other ways, mixer..etc. The exciter chassis does not have the holes where the helicals screws would have gone threaded, so it's not a mobile converted to repeater service. Unless there's another issue as to why I the sensitivity isn't there, it looks to be in great shape. No repairs are apparant, nobody has butchered it. I mentioned that I went through the factory tune up procedure step by step and each time the voltage I found was below the range given in the service docs. I also mentioned after changing the helical screws/slugs the sensitivity increased a lot and those voltages did get a lot closer to the bottom end of the range it gives. I mentioned I changed the JFET in the mixer although a generic sub within the correct frequency range and voltages. With the exception of needing to change the compensating cap for the new crystal, I had the exciter tuned up in about 5 minutes. I believe it was putting out 15 watts with the original crystal and I had exactly the same after retuning it. Sure looks like it's still an issue with the helicals. Much like I've encountered with Micor receivers. However, this is my first EFJ repeater so any hints or tips would be greatly appreciated, the boys down here with ARES are appreciative too. Thanks again for your help...Don --- In Repeater-Builder@yahoogroups.com, Paul Finch [EMAIL PROTECTED] wrote: Don, Do you know what band the radio was on when in service? If it was a 480 MHz radio it would tune to 460 but have major problems tuning to 440. If this was the case you need to lengthen the helical resonators about 1/2 turn to start with, that is if my memory serves me right. That is a very good receiver, what does it look like, they had a couple different versions. Both had the same basic electronics but different housings. Does the exciter tune up? Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of donlspivey Sent: Monday, February 27, 2006 9:48 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Help With EF Johnson CR-1000 Repeater Ok you Johnson ghuru's out there, please read this. I was asked by an area ARES group to lend a hand and convert an EF Johnson CR-1000 series UHF repeater to amateur use. This is, of course, free gratis on my part, I'll even chip in the ID'er since it's for a good cause. I cannot get the receive sensitivity where it should be. Initially when I received it, the JFET located inside the preselector was blown. I replaced it with a generic JFET but not an exact match. At first I couldn't get the sensitity any lower than about 50uv and several tuning screws were bottomed out in the row of helicals suggesting the new frequency is beyond the range of the preselector. I replaced the screws with a similar brass screw but about 3/8 in longer and I was able to get the sensitivity down into the 10-15uv range, obvioiusly a big improvement, but still way off. No screws were bottoming out at this point. I first retuned the receiver as per the factory manual. I did, however, note the suggested minimum voltage reading I should see were always lower. I've really never particularly paid strict attention to these should be about readings, but all increased after the machine screw changeout suggesting they could possibly increase more once the proper sensitivity is reached. Does anyone have experience with this repeater or the mobile chassis it's patterned after? I can assume the helicals will need modification, but that's why I asking the experts The group that will own/manage this repeater are buidling their shack this week and hanging hardline, so it looks like I may be the holdup here. Please point me in the right direction...Thanks...de N5MZQ 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] Duol band commercial antennas
Hey guys, Anyone aware of an antenna called a DB314? I guess it's a commercial duol band antenna. I've got a sight that might work for a duol band of some sort. Any ideas if such a thing exists? Thanks, Jed 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] Duol band commercial antennas
Yes it exists.. check Tessco for details 73 Mike Perryman www.k5jmp.us -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Jed Barton Sent: Tuesday, February 28, 2006 1:07 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Duol band commercial antennas Hey guys, Anyone aware of an antenna called a DB314? I guess it's a commercial duol band antenna. I've got a sight that might work for a duol band of some sort. Any ideas if such a thing exists? Thanks, Jed 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] Duol band commercial antennas
Does it work well? Any such animal that might do 220? -Original Message- From: Mike Perryman [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 28, 2006 3:11 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Duol band commercial antennas Yes it exists.. check Tessco for details 73 Mike Perryman www.k5jmp.us -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Jed Barton Sent: Tuesday, February 28, 2006 1:07 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Duol band commercial antennas Hey guys, Anyone aware of an antenna called a DB314? I guess it's a commercial duol band antenna. I've got a sight that might work for a duol band of some sort. Any ideas if such a thing exists? Thanks, Jed 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] Pyramid Phase III Power supplies
N9WYS wrote: Sorry for the OT post, but am looking for information to make contact with the manufacturer of Pyramid/Tenna Phase III power supplies. Can't seem to find them in a web search. H.. Anyhow - if you can help, please contact me off-list. Tenna went out of business in the late 80's. Who might've been making those supplies after then is a mystery to me. I doubt it was the same Pyramid that makes vehicular repeaters. http://www.pyramidcomm.com/ But ya never know... 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] Pyramid Phase III Power supplies
By doing a web search for Pyramid/Tenna Phase III Power Supply (or variations of that combination) I only find dealers... Apparently SOMEONE is still out there making them - whether it's the same company as before is unknown. Thanks, Jim. Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jim B. Sent: Tuesday, February 28, 2006 1:16 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Pyramid Phase III Power supplies N9WYS wrote: Sorry for the OT post, but am looking for information to make contact with the manufacturer of Pyramid/Tenna Phase III power supplies. Can't seem to find them in a web search. H.. Anyhow - if you can help, please contact me off-list. Tenna went out of business in the late 80's. Who might've been making those supplies after then is a mystery to me. I doubt it was the same Pyramid that makes vehicular repeaters. http://www.pyramidcomm.com/ But ya never know... 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] Help with Tuning an MSF 5000 UHF Repeater
First, can someone tell me in the F/D tuning of the MSF5000, they say to adjust for a dip in the RF Millivolt meter, which I can get, and then says to go a half turn past that, on the dip, does it go to the bottom of the dip and remain there, or where should it come back up to. This is very unclear to me. My problem is, I'm still getting double beeps from the repeater, stating that there is a mismatch with the PA. I can manually key the transmitter with the xmit switch on the repeater, get about 55 watts out, but the repeater will not key up. The controller is keying he PA exciter, just not the amplifier stage. Mathew 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] Bird Element
Hello all I am looking to buy A Bird Model 43 Element 150-250 Mhz 2.5 Watts 150-250 MHz What I would like to know is there a way to Calculate the accuracy in using this Slug on 2 Meters 144-148, As everyone knows Elements are expensive and I would like to use it to tune up some Murs Low Power 2 Watt radios 151.-155 Also some 220 Exciters . Also I recall seeing yrs ago a Bird Low Power Wattmeter but I don't recall the Model number to look it up. Thanks Don KA9QJG 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] Help with Tuning an MSF 5000 UHF Repeater
Do this: Turn down your PO. If you have it cranked up it can go into foldback and act like its acting now. What I did on mine is turn the power down and put the bird meter with a dummy load on it on the output on the side of the cabinet.. I then keyed the repeater and turned out the power till it folded back.. I then turned it down and peaked the final slug in the preselector for maximum smoke. It only took 1/8 turn if even that... The I ran the power up to max and found another 23 watts. n9lv wrote: First, can someone tell me in the F/D tuning of the MSF5000, they say to adjust for a dip in the RF Millivolt meter, which I can get, and then says to go a half turn past that, on the dip, does it go to the bottom of the dip and remain there, or where should it come back up to. This is very unclear to me. My problem is, I'm still getting double beeps from the repeater, stating that there is a mismatch with the PA. I can manually key the transmitter with the xmit switch on the repeater, get about 55 watts out, but the repeater will not key up. The controller is keying he PA exciter, just not the amplifier stage. Mathew Yahoo! Groups Links -- Jay Urish W5GM ARRL Life MemberDenton County ARRL VEC TXFCA President N5ERS VP/Trustee DCARA President Denton County ARES AEC Monitoring 444.850 PL-88.5 146.92 PL-110.9 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] Help with Tuning an MSF 5000 UHF Repeater
If the output power is set too high, the station will make a short pulse of output power, then just stop transmitting with a fault/failure indication (maybe it will beep but I wasn't listening at the time). I suppose you could tweak the last coil in the pre-filter, but I suspect something else is causing that to have an effect. Maybe your original tuning was off by that amount. Another thing I did once was to use a precision 50 ohm dummy load (one with a real good return loss) at the other end of the section I was tuning (the end NOT connected to the signal generator). This gave me better results, so I think the impedance of the PA or IPA might not be exactly 50 ohms. Tweaking the appropriate coil after-the-fact would be recommended after tuning it in this fashion. Bob M. == --- Jay Urish [EMAIL PROTECTED] wrote: Do this: Turn down your PO. If you have it cranked up it can go into foldback and act like its acting now. What I did on mine is turn the power down and put the bird meter with a dummy load on it on the output on the side of the cabinet.. I then keyed the repeater and turned out the power till it folded back.. I then turned it down and peaked the final slug in the preselector for maximum smoke. It only took 1/8 turn if even that... The I ran the power up to max and found another 23 watts. n9lv wrote: First, can someone tell me in the F/D tuning of the MSF5000, they say to adjust for a dip in the RF Millivolt meter, which I can get, and then says to go a half turn past that, on the dip, does it go to the bottom of the dip and remain there, or where should it come back up to. This is very unclear to me. My problem is, I'm still getting double beeps from the repeater, stating that there is a mismatch with the PA. I can manually key the transmitter with the xmit switch on the repeater, get about 55 watts out, but the repeater will not key up. The controller is keying he PA exciter, just not the amplifier stage. Mathew __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.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] Bird Element
Closest off the shelf slug is the Bird 5C, which is 5W at 100-250MHz. These are avalible from RFparts.com for $79. It looks like they can special order a 2.5W slug, but it is narrow band and takes 30-45 days to deliver. They don't specify the pricing for this model. On 2/28/06, Don [EMAIL PROTECTED] wrote: Hello all I am looking to buy A Bird Model 43 Element 150-250 Mhz 2.5 Watts 150-250 MHz What I would like to know is there a way to Calculate the accuracy in using this Slug on 2 Meters 144-148, As everyone knows Elements are expensive and I would like to use it to tune up some Murs Low Power 2 Watt radios 151.-155 Also some 220 Exciters . Also I recall seeing yrs ago a Bird Low Power Wattmeter but I don't recall the Model number to look it up. Thanks Don KA9QJG 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: A sad story
--- In Repeater-Builder@yahoogroups.com, Chuck Kelsey [EMAIL PROTECTED] wrote: Well, I thought you said that you changed cabling and that's when this started happening. I had a cable on the input to the duplexer, that went to the power amp, that was a nasty chain of adaptors. I replaced that with a short BNC-N cable made with LDF1-50 Take it one step at a time. Starting at the transmitter, take a jumper and check VSWR to a dummy load, then check loss at the end of the jumper. Add one can terminated with the dummy load and check VSWR and then loss again. Keep going till you find where your transmit signal goes haywire. I didn't take it quite that far, but I am putting 100W into the TX side of the cans, and getting nothing measurable out. If your VSWR is good, I'd suspect somehow you've got some real lossy cables in the mix. Divide and conquer. The inter-can cables are the same ones throughout. They both get warm now, but I'm having a hard time believing that BOTH failed. I'll know more when I get it down here for a post-op. 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] OT RED CROSS
So why are they using Katrina as a reason in their ads that they need to replenish their funds? That seems to border on fraud. Joe M. 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] motorola r100 rptr
Tom, That should all be done with the Motorola rss software for the R100. Dick, 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] Re: A sad story
But you say that the VSWR is good? Anyway, do some testing piece by piece till you discover the point where you loose all the power. Chuck Dave VanHorn wrote: I didn't take it quite that far, but I am putting 100W into the TX side of the cans, and getting nothing measurable out. 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] WTB: Vibrasponder reeds
for the umpteenth time KLN6209-TLN8381-TLN6709 and even the K1000, also old bramco vibrasponders, are all electrically interchangeable . the only exception is physical the TLN8381 which is the fat little sponder that only fits where fat little sponders fit. the KLN6210-TLN6824- Vibrasenders are also interchangeable. in some cases they can be interchanged between sender and sponder but it ain't advised unless you have no alternative. we still have a large selection of reeds in most of the tones. some are very rare and belong on antiques road show. stock up now while they are still available. it won't last forever. mdm --- N9WYS [EMAIL PROTECTED] wrote: I am needing two Motorola Vibrasponder PL reeds: TLN8381A - tone 114.8 Please contact me off list and name your poison. Ted Bleiman K9MDM MDM Radio Ltd - 1629-B N. 31 st Ave Melrose Park, IL 60160 708.681.0300 fax 708.681.9800 web http://www.mdmradio.com - Check it now!! __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.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] Re: A sad story
Ummm, hmm. I think you have a DC short in one of the connectors meaing a piece of braid is touching the center conductor. Test the interconnect cables with a ohm meter for the short. If this is a duplexer harness then the electrical 1/4 wave piece of coax that is the interconnect cable becomes a shorted coaxial stub which would give good VSWR but basicly absorb the RF power at the 1/4 wave frequency. This concept is used in the heliax duplexer. except in the case of a shorted interconnect cable you give the RF no place to go so it gets transformed into heat by the cableing its self. I may be wrong as well, this is my best guess. The RF world is filled with all kinds of pit-falls and gotchyas. Just the other day we had a piece of RG-6 as a jumper be the perfect length to attenuate CATV channel 36's color carrier but all the other channels looked fine. On 2/28/06, Chuck Kelsey [EMAIL PROTECTED] wrote: But you say that the VSWR is good? Anyway, do some testing piece by piece till you discover the point where you loose all the power. Chuck Dave VanHorn wrote: I didn't take it quite that far, but I am putting 100W into the TX side of the cans, and getting nothing measurable out. 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] MFJ 1516 repeater antenna
"MFJ" and "repeater antenna" should never be used in the same sentence for duplex operation espescially on a repeater Yahoo! Mail Bring photos to life! New PhotoMail makes sharing a breeze. 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] Beam v. Folded Dipole
Hi Howard, The DB Products DB-215 antenna would fit That situation. Two folded dipoles and two 3 element Yagi's on one phasing harness. The pattern is called a keyhole pattern with the main lobe having a horizontal beamwidth of 56degrees. I have a 2 meter version that I used to use and they work fantastic. Mike --- hl31943 [EMAIL PROTECTED] wrote: My GMRS repeater will be at the point of a 30 - 40 degree V formed by two mountain ranges about 500' higher than my location. Fortunately, the town that I want to cover is in the open part of the V and about 12 miles away. Unfortunately, there is a mountaintop about the same elevation as my repeater about halfway between the town and me, but that's life in the mountains. The question is: since I'm trying to cover a 30 - 40 degree area, a five or six element beam fits the bill and I already have the beam. But, would a four element folded dipole with the elements set up for a cardioid pattern (let's pretend same gain, roughly the same horizontal coverage area) work better because of more iron up on the tower? I don't have a 4 el. antenna, so I'm leaning toward the beam. Thoughts? Howard WB4GUD Yahoo! Groups Links [EMAIL PROTECTED] __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.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/
[Repeater-Builder] Re: motorola r100 rptr
Actually, it is not. It involves a jumper setting along with various configurations of three resistors to set the squelch tail timing. As a previous thread stated, it is a little involved, and requires the manual. Gary KB7TRP --- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote: Tom, That should all be done with the Motorola rss software for the R100. Dick, 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/
Fw: [MotorolaR100Repeater] Fw: [Repeater-Builder] motorola r100 rptr
Tuesday, February 28, 2006 6:20 PM Subject: Re: [MotorolaR100Repeater] Fw: [Repeater-Builder] motorola r100 rptr The hang-time on a R100 is determined by JU12 and resistors R922, R923 and R924. All these parts are found on the Control Board which is in the lid of the repeater. 2 sec hang-time would mean JU12 is out. R922 and R923 out. R924 (27K)in. Hopefully your Control Board is silkscreened so you can find these locations. Good Luck!! Randy hello i have a uhf25watt r 100 motorola repeater which has been set up for no repeater tail at end of transmitting. i want to put it back to the original 2 second default setup could someone tell me the procedure involved on the controller board as i see they soudered a few new electronic parts on it thanks tom 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] Bush signs 700 MHz transition package into law
As expected, President George W. Bush yesterday signed budget-reconciliation legislation that includes a firm date for TV broadcasters to clear 700 MHz spectrum and $1.2 billion in funding earmarked for public-safety communications. Last week, the U.S. House of Representatives voted 216-214 to approve the budget package, which requires broadcasters to clear the 700 MHz airwaves on Feb. 17, 2009, after which 24 MHz of frequencies will be allocated nationwide to public safety. Other airwaves in the band will be auctioned to commercial operators in a bidding process expected to generate $10 billion in additional revenue for the government. Under previous law, broadcasters tentatively were targeted to clear the 700 MHz band by the end of this year, but they were not required to do so until 85% of all U.S. television sets could receive digital signalsa threshold that could take decades to reach, according to many analysts. Some public-safety officials previously had expressed hope that first responders might receive more than the 24 MHz of airwave earmarked, but enacting the budget measure effectively ends such discussion, said Harlin McEwen, chairman of the International Association of Chiefs of Police communications and technology committee. All the spectrum that is not going to public safety is ready to be auctioned, so it is highly unlikely [that more frequencies would be dedicated to public safety], McEwen said. In addition to allocating spectrum to public safety, the law creates a $1 billion grant program to pay for public-safety interoperable communications systems, $156 million for national alert and tsunami warning systems and $43.5 million to help fund E-911 upgrades as called for in the Enhance 911 Act passed in 2004. Most of the $10 billion in expected auction proceeds will be used to reduce budget deficits and to fund a program designed to provide people with analog TV sets low-cost converters that will let them receive digital broadcasts. No Comment Don KA9QJG 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: Help With EF Johnson CR-1000 Repeater
Don, Do you have a manual? The 5 helical resonators together are the front end and the three together are the tuning for the injection to the mixer. Really easy radio to work on. Are the 461.XXX crystals EF Johnson or another make. A 461 receiver really should come down to 440 OK. It still sounds like you need to add some to the helicals. Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of donlspivey Sent: Tuesday, February 28, 2006 12:58 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Help With EF Johnson CR-1000 Repeater Thanks for the help Paul: Originally it was on 461.375, which appears to be from the factory. Both the exiter and receiver look to be a cast mobile radio chassis remounted for rack use with unnecesscary circuitry not installed. All looks original and non modified. It's very clean. The receiver has a row of 5 helicals then three more used in other ways, mixer..etc. The exciter chassis does not have the holes where the helicals screws would have gone threaded, so it's not a mobile converted to repeater service. Unless there's another issue as to why I the sensitivity isn't there, it looks to be in great shape. No repairs are apparant, nobody has butchered it. I mentioned that I went through the factory tune up procedure step by step and each time the voltage I found was below the range given in the service docs. I also mentioned after changing the helical screws/slugs the sensitivity increased a lot and those voltages did get a lot closer to the bottom end of the range it gives. I mentioned I changed the JFET in the mixer although a generic sub within the correct frequency range and voltages. With the exception of needing to change the compensating cap for the new crystal, I had the exciter tuned up in about 5 minutes. I believe it was putting out 15 watts with the original crystal and I had exactly the same after retuning it. Sure looks like it's still an issue with the helicals. Much like I've encountered with Micor receivers. However, this is my first EFJ repeater so any hints or tips would be greatly appreciated, the boys down here with ARES are appreciative too. Thanks again for your help...Don --- In Repeater-Builder@yahoogroups.com, Paul Finch [EMAIL PROTECTED] wrote: Don, Do you know what band the radio was on when in service? If it was a 480 MHz radio it would tune to 460 but have major problems tuning to 440. If this was the case you need to lengthen the helical resonators about 1/2 turn to start with, that is if my memory serves me right. That is a very good receiver, what does it look like, they had a couple different versions. Both had the same basic electronics but different housings. Does the exciter tune up? Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of donlspivey Sent: Monday, February 27, 2006 9:48 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Help With EF Johnson CR-1000 Repeater Ok you Johnson ghuru's out there, please read this. I was asked by an area ARES group to lend a hand and convert an EF Johnson CR-1000 series UHF repeater to amateur use. This is, of course, free gratis on my part, I'll even chip in the ID'er since it's for a good cause. I cannot get the receive sensitivity where it should be. Initially when I received it, the JFET located inside the preselector was blown. I replaced it with a generic JFET but not an exact match. At first I couldn't get the sensitity any lower than about 50uv and several tuning screws were bottomed out in the row of helicals suggesting the new frequency is beyond the range of the preselector. I replaced the screws with a similar brass screw but about 3/8 in longer and I was able to get the sensitivity down into the 10-15uv range, obvioiusly a big improvement, but still way off. No screws were bottoming out at this point. I first retuned the receiver as per the factory manual. I did, however, note the suggested minimum voltage reading I should see were always lower. I've really never particularly paid strict attention to these should be about readings, but all increased after the machine screw changeout suggesting they could possibly increase more once the proper sensitivity is reached. Does anyone have experience with this repeater or the mobile chassis it's patterned after? I can assume the helicals will need modification, but that's why I asking the experts The group that will own/manage this repeater are buidling their shack this week and hanging hardline, so it looks like I may be the holdup here. Please point me in the right direction...Thanks...de N5MZQ 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
Re: [Repeater-Builder] Bird Element
--- Don [EMAIL PROTECTED] wrote: Hello all I am looking to buy A Bird Model 43 Element 150-250 Mhz 2.5 Watts 150-250 MHz What I would like to know is there a way to Calculate the accuracy in using this Slug on 2 Meters 144-148, As everyone knows Elements are expensive and I would like to use it to tune up some Murs Low Power 2 Watt radios 151.-155 Also some 220 Exciters . Also I recall seeing yrs ago a Bird Low Power Wattmeter but I don't recall the Model number to look it up. Thanks Don KA9QJG There is no need to calculate the accuracy by only going to 144 mhz. It is the same within the ability of someone to look at the meter and see it move going from 150 to 144 mhz. Bird did have some charts for typical elements using them out of the nominal range. __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.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] Bird Element
Don, Just buy a Bird 5C element, which covers 100 to 250 MHz. It's not worth the expense and restricted bandwidth to buy a special element that has limited usefulness. After all, when you are tuning an exciter, it's usually tuning for a maximum reading which need not be particularly accurate. You might try contacting Bird tech support to get info on the accuracy degradation for out-of-band signals. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Don Sent: Tuesday, February 28, 2006 12:07 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Bird Element Hello all I am looking to buy A Bird Model 43 Element 150-250 Mhz 2.5 Watts 150-250 MHz What I would like to know is, is there a way to calculate the accuracy in using this Slug on 2 Meters 144-148? As everyone knows, elements are expensive and I would like to use it to tune up some MURS Low Power 2 Watt radios 151.-155 Also some 220 Exciters . Also I recall seeing yrs ago a Bird Low Power Wattmeter but I don't recall the Model number to look it up. Thanks Don KA9QJG 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] Dual band commercial antennas
Andrew makes one, it's a DB-224 and a DB-420/DB-408 on the same mast. I think those are the correct model numbers. Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Jed Barton Sent: Tuesday, February 28, 2006 12:07 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Duol band commercial antennas Hey guys, Anyone aware of an antenna called a DB314? I guess it's a commercial duol band antenna. I've got a sight that might work for a duol band of some sort. Any ideas if such a thing exists? Thanks, Jed 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: Help With EF Johnson CR-1000 Repeater
Paul.. I have the manual, a nice clean one. The original crystal was indeed an EFJ crystal and looked to be original. I've pulled the entire set of helicals out one already to install the JFET mixer transistor, it's a great radio to work with, very easy to get to everything. So, I take it you still think I still need to add a bit to the resonators. How much to you suggest? Half a turn possibly (it's always easy to cut them back it too long)? And do would the 3 mixer resonators need extending too?? Thanks again Paul...Don --- In Repeater-Builder@yahoogroups.com, Paul Finch [EMAIL PROTECTED] wrote: Don, Do you have a manual? The 5 helical resonators together are the front end and the three together are the tuning for the injection to the mixer. Really easy radio to work on. Are the 461.XXX crystals EF Johnson or another make. A 461 receiver really should come down to 440 OK. It still sounds like you need to add some to the helicals. Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of donlspivey Sent: Tuesday, February 28, 2006 12:58 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Help With EF Johnson CR-1000 Repeater Thanks for the help Paul: Originally it was on 461.375, which appears to be from the factory. Both the exiter and receiver look to be a cast mobile radio chassis remounted for rack use with unnecesscary circuitry not installed. All looks original and non modified. It's very clean. The receiver has a row of 5 helicals then three more used in other ways, mixer..etc. The exciter chassis does not have the holes where the helicals screws would have gone threaded, so it's not a mobile converted to repeater service. Unless there's another issue as to why I the sensitivity isn't there, it looks to be in great shape. No repairs are apparant, nobody has butchered it. I mentioned that I went through the factory tune up procedure step by step and each time the voltage I found was below the range given in the service docs. I also mentioned after changing the helical screws/slugs the sensitivity increased a lot and those voltages did get a lot closer to the bottom end of the range it gives. I mentioned I changed the JFET in the mixer although a generic sub within the correct frequency range and voltages. With the exception of needing to change the compensating cap for the new crystal, I had the exciter tuned up in about 5 minutes. I believe it was putting out 15 watts with the original crystal and I had exactly the same after retuning it. Sure looks like it's still an issue with the helicals. Much like I've encountered with Micor receivers. However, this is my first EFJ repeater so any hints or tips would be greatly appreciated, the boys down here with ARES are appreciative too. Thanks again for your help...Don --- In Repeater-Builder@yahoogroups.com, Paul Finch dpaulfinch@ wrote: Don, Do you know what band the radio was on when in service? If it was a 480 MHz radio it would tune to 460 but have major problems tuning to 440. If this was the case you need to lengthen the helical resonators about 1/2 turn to start with, that is if my memory serves me right. That is a very good receiver, what does it look like, they had a couple different versions. Both had the same basic electronics but different housings. Does the exciter tune up? Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of donlspivey Sent: Monday, February 27, 2006 9:48 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Help With EF Johnson CR-1000 Repeater Ok you Johnson ghuru's out there, please read this. I was asked by an area ARES group to lend a hand and convert an EF Johnson CR-1000 series UHF repeater to amateur use. This is, of course, free gratis on my part, I'll even chip in the ID'er since it's for a good cause. I cannot get the receive sensitivity where it should be. Initially when I received it, the JFET located inside the preselector was blown. I replaced it with a generic JFET but not an exact match. At first I couldn't get the sensitity any lower than about 50uv and several tuning screws were bottomed out in the row of helicals suggesting the new frequency is beyond the range of the preselector. I replaced the screws with a similar brass screw but about 3/8 in longer and I was able to get the sensitivity down into the 10-15uv range, obvioiusly a big improvement, but still way off. No screws were bottoming out at this point. I first retuned the receiver as per the factory manual. I did, however, note the suggested minimum voltage reading I should see were always lower. I've really never particularly paid strict attention to these should be about readings, but all increased after the machine screw changeout
RE: [Repeater-Builder] Re: Help With EF Johnson CR-1000 Repeater
Don, It sounds like your close, I have had very good luck butt soldering the same gauge wire to the top end of the coil and formed in the same shape as the helical. I would start at around 1/2 turn and re-install the helical strip. Cut a little off if necessary. Turn the screws up and see if it tunes. I have worked on a lot of the UHF radios, it really sounds like you have the high split 480 to 512 radio. I have moved several 480 radios down to 440 this way but I have never had to add anything to the 460 split radios. By the way, yes you will need to add to the multiplier/injection helical resonators to get them to tune. That is unless you went to high side injection and then you may still need some. A trick I learned, cut the metal strip where you have three strips, the multiplier strip helicals on one end and the 5 helicals from the RF input on the other. That leaves the middle strip where the mixer transistor is. Cut right in the middle of the screw holes, when you screw them in the screw make the ground connection for both parts. I have never noticed any degradation in sensitivity doing this. You will find aviation shears work the best. This makes it a lot easier to remove just the helicals that need lengthened. By the way, you can't do that with a VHF 530 or 529, the strip is a PC board. Another by the way, I am working on converting a Fleetcom 530 150-160 MHz radio to 220 MHz. I have the exciter putting out 8/10 of a watt and the receiver tuning except the last two helicals nearest the mixer. Something else, I guess you see that these radios don't have a receive RF amplifier. Pretty good, huh. Makes for less intermod! Hope this helps, Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of donlspivey Sent: Tuesday, February 28, 2006 8:06 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Help With EF Johnson CR-1000 Repeater Paul.. I have the manual, a nice clean one. The original crystal was indeed an EFJ crystal and looked to be original. I've pulled the entire set of helicals out one already to install the JFET mixer transistor, it's a great radio to work with, very easy to get to everything. So, I take it you still think I still need to add a bit to the resonators. How much to you suggest? Half a turn possibly (it's always easy to cut them back it too long)? And do would the 3 mixer resonators need extending too?? Thanks again Paul...Don --- In Repeater-Builder@yahoogroups.com, Paul Finch [EMAIL PROTECTED] wrote: Don, Do you have a manual? The 5 helical resonators together are the front end and the three together are the tuning for the injection to the mixer. Really easy radio to work on. Are the 461.XXX crystals EF Johnson or another make. A 461 receiver really should come down to 440 OK. It still sounds like you need to add some to the helicals. Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of donlspivey Sent: Tuesday, February 28, 2006 12:58 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Help With EF Johnson CR-1000 Repeater Thanks for the help Paul: Originally it was on 461.375, which appears to be from the factory. Both the exiter and receiver look to be a cast mobile radio chassis remounted for rack use with unnecesscary circuitry not installed. All looks original and non modified. It's very clean. The receiver has a row of 5 helicals then three more used in other ways, mixer..etc. The exciter chassis does not have the holes where the helicals screws would have gone threaded, so it's not a mobile converted to repeater service. Unless there's another issue as to why I the sensitivity isn't there, it looks to be in great shape. No repairs are apparant, nobody has butchered it. I mentioned that I went through the factory tune up procedure step by step and each time the voltage I found was below the range given in the service docs. I also mentioned after changing the helical screws/slugs the sensitivity increased a lot and those voltages did get a lot closer to the bottom end of the range it gives. I mentioned I changed the JFET in the mixer although a generic sub within the correct frequency range and voltages. With the exception of needing to change the compensating cap for the new crystal, I had the exciter tuned up in about 5 minutes. I believe it was putting out 15 watts with the original crystal and I had exactly the same after retuning it. Sure looks like it's still an issue with the helicals. Much like I've encountered with Micor receivers. However, this is my first EFJ repeater so any hints or tips would be greatly appreciated, the boys down here with ARES are appreciative too. Thanks again for your help...Don --- In Repeater-Builder@yahoogroups.com, Paul Finch dpaulfinch@ wrote: Don, Do you know what band the radio was on when in service?
Re: [Repeater-Builder] Re: ELT Receiver on Repeater
Dave VanHorn wrote: Anyway, you may have to get a receiver and build something to decode the yelp. If you find a simple way, I'd be interested in adding it again to my repeater network. Why would you need more than a receiver, and the equivalent of a VOX ckt? If you have carrier on 121.5, and there's audio persisting for more than a few seconds, then it's likely an ELT. If not, listening to the audio for a few seconds will resolve that. City noise has proven this wrong here in Denver before. All sorts of crud hits a high-mountain 121.5 AM reciever. The best was the bad power transformer on top of a downtown Denver building... that took quite a group of DF'ers to find... and then you'd get into downtown under the building and the signal would fade... The L-Per receivers for mountain-top use provide a way to monitor for both carrier and signals that have the appropriate sweep tones. I believe they just have a typical zero-crossing type circuit tied to the audio and count pulses... but I never looked at one that closely. Sweep tones vary wildly in speed when ELT batteries get weak, etc. Most of these will still trigger the logic output in the L-Per. It's pretty good. We did miss one that was sweeping so slowly that it wasn't heard until the audio from the receiver was commanded on via DTMF on the repeater after SARSAT hits in the area were reported. Then of course, it was there, sounding like a very sick dog... Also - if an aircraft flying is experiencing an emergency and you're really only monitoring for ELT's, having the sweep detector is nice. You don't have to listen in on that or have it tripping any alerts that way. It's also nice if you're setting one up to WAIT a couple of minutes before alerting, to see if it's just someone testing an ELT. Many people don't test at the appropriate legal times, or don't even realize there is an appropriate test time in each hour, but if they're just testing, the signal's only there for a minute or two... usually. The best ELT story here is probably the one in the USPS rail car... passing through the city... USPS Inspectors don't like being called out at late hours to unlock mail cars on trains, we learned... but they do show up. The occasional ELT in a car trunk, set off by the rough ride, is also always a good time to be had by all DF hunters. And the glider that was folded up and on its trailer, being towed from Boulder, CO to Golden, CO down the front of the Front Range foothills (Colorado Highway 93) provided some REALLY interesting bounces/reflections to triangulate... and of course it was also a moving target for an hour and a half or so... The Denver area is well-covered... http://www.fredf.org Multiple ELT receivers at various airports, with low-power UHF links back to a UHF repeater with various alert modes. All of which have receiver signal strength indications in voice, and the ability to monitor or alert on either 121.5 or 243.0, fully commandable by DTMF, as well as various alert and SHUT UP modes... (that latter one is important with airborne ELTs, as well as a way for them all to do collision-detection when they're all trying to alert at once!). They also all have discreet DTMF codes they send during alerts which allows the repeater controller on the mountain to have macros that respond to the DTMF and does other things (like put gated receiver audio from the mountaintop receiver into the background on the repeater... so you can hear what it's hearing, but gated so if you talk over it, it gets muted.), as well as announcing the airport identifier in voice and the frequency if that airport has both... Here's kinda what it sounds like from memory... ELT AIRPORT MONITOR DEVICE: (key) DTMF DIGITS B J C JeffCo 1 2 1 POINT 5 10 seconds of audio from receiver at that airport (callsign in CW) (unkey) REPEATER CONTROLLER: E L T ALERT!, then two-tone warble and ELT in CW every 30 seconds or so... receiver on mountaintop gated audio placed in background... which if no one is talking, is foreground... Then various commands available to listen longer at each site (or open up other sites to see if they're hearing it also), switch to 243.0 if it's on 121.5 or vice-versa, or sleep the receiver at that site for a set period of time. (Early versions had on/off and people would forget to turn them back on... they still have on/off, but sleep is preferred.) Then eventually when it's all over... some cleanup or event over codes to reset everything. The controllers of the remote monitors are also polite in that if the search team is using the darn repeater, the site alerts wait for a break in the conversation, and get slower over time. Since it's all DTMF floating around triggering all of this stuff, the guy that designed the remote receivers also took a Linux PC with a DTMF decoder on it and had it post activity from the mountain or the remote monitors to a web page... those
