Re: [Repeater-Builder] coaxial collinear
On Thursday 07 October 2004 06:47 pm, Kevin Custer wrote: Correct. Plus, it *can* be longer than 1/4 wave. Many commercial manufacturers actually use the large aluminum mounting tube at the bottom of the antenna for the decoupling sleeve. Thanks. About 20 years ago Radio Shack sold some poorly shielded RG-8 with a solid dielectric. This stuff works well for the dielectric and center conductor for antenna projects, besides, the shielding was junk anyway. I remember that stuff; used to have a bunch of it but threw it out a few years ago. I looked around the local area for some after you mentioned this a while back, but came up empty handed. Finally I discovered most of the stuff I'd already tried without success will fit if it's put in the freezer for an hour. :) I got distracted today, but hopefully I will get this antenna finished and tested tomorrow. If this works like I think it will I'll be building a few more. Paul 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 Circulator
Andy, My understanding of British radio terminology is not complete, so I am a little confused by your statement about the receive port of the circulator. In circulator (isolator) applications I am familiar with, the input of the circulator connects directly to the transmitter output, the output of the circulator connects to the TX input cavity of the duplexer, and a 50 ohm load is connected to the side connector. Once the three capacitors (or six, on a dual circulator) have been adjusted on a network analyzer with the loads that will be used in service, there should be no reason to tweak any of the adjustments. In fact, I have been able to improve the performance of a circulator that was originally tuned with loads that were very close to 50 ohms, but was installed with loads that were between 51 and 53 ohms. This is one tuning job that a network analyzer can perform to a gnat's eyelash! If you were able to improve your repeater's operation by tweaking the circulator, I suggest that a better solution might be to tune your antenna and/or your duplexer to 50 ohms. It might be an interesting project to install a simple impedance matcher (Z-matcher) between the duplexer and the antenna. It's not clear where each component in your repeater system is installed, so perhaps you can elaborate on the arrangement? Specifically, where is the circulator installed? Thanks! 73, Eric Lemmon WB6FLY Andy Hearn wrote: HI I have just changed my 70 cm repeater antenna over to a co-linear 8 dBd gain, was running 2 full wave dipoles stacked (reason..antenna faults and not able to mount with correct vertical spacing). When I was calibrating the circulator on the bench, all set up perfectly, with the receive port being sharp in its setting. On site since the antenna was running a slightly higher VSWR compared to a dummy load (1.2:1), I thought it might be an idea to just tweak the receive port to optimise the rejection. However I found the tuning to be very flat, question, is this normal or am I missing something? 73 Andy G3UEQ 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 Circulator
From: Eric Lemmon [EMAIL PROTECTED] Date: Thu, 07 Oct 2004 18:49:13 -0700 Subject: Re: [Repeater-Builder] Re Circulator Andy, My understanding of British radio terminology is not complete, so I am a little confused by your statement about the receive port of the circulator. In circulator (isolator) applications I am familiar with, the input of the circulator connects directly to the transmitter output, the output of the circulator connects to the TX input cavity of the duplexer, and a 50 ohm load is connected to the side connector. I learned that was an isolator. The product I work on in my dayside job has a four-port circulator. The transmitter is connected to port one, which passes any signal clockwise (for the sake of argument) to port two. The antenna is connected to port two, the receiver to port three, and a load to port four. Since all signals are passing clockwise, from port one to two, port two to three, port three to four, and port four to one, the load on port four is not visible to the transmitter. The receiver on port three is not visible to the transmitter, assuming the antenna absorbs all the RF. And any signals that the bandpass filter in the front end of the receiver rejects do not go back out the antenna, as they would have to go counterclockwise to get there. Ditto received signals and the transmitter; the circulator won't allow them to go that way. The same product also has an isolator in it at an earlier stage. What goes in port one comes out port two; what comes in port two is turned into heat in the load on port three. The energy coming in port two can't go to port one because it's being steered clockwise by the isolator. Circulators are very common in microwave applications as they allow the use of a single waveguide for both transmit and receive, minimizing the problems inherent in running what is essentially a rectangular pipe from the radio to the antenna and the problems of evenly illuminating a reflector with two different feedhorns. I have casually wondered upon occasion if a four-port circulator in a repeater would confer any benefit, possibly increasing isolation and allowing the use of smaller, hopefully less costly duplexers. de kg7yy [snip] 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: highest repeater site
I vaguely recall seeing a picture of an MPA/MPD as the station's 2-meter rig. Don't know if it's been upgraded or replaced since then. Kenneth Buley Bullitt County ARES/RACES Coordinator KY4DES Bullitt County EMA CD-2 Bullitt County Red Cross Disaster Communications BC-6 -Original Message- From: Jim B. [mailto:[EMAIL PROTECTED] Sent: Thursday, October 07, 2004 3:47 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: highest repeater site Leon Ingerick wrote: Is there a repeater on the space station? That's gotta about as high as you can get I would think.. I wonder if it is a Mastr-Pro or a ?? Leon-N2HLT There used to be, but it was cross-band, so it was likely a dual-band ham rig? heh- a mastr pro would almost draw more current than the whole rest of the station...at least it seems like it. -- 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: Re Circulator
Eric / Don Mine is a 3 port Circulator/isolator, I tuned it up on sig gen with 50 ohm pads and UHF rx with 50 ohm pads as detector, rotating it round a few times to optimise receive port isolation, I was getting around 65 dB isolation between TX port (1) and RX port (3), insertion lost TX port (1) to antennae port (2) less than 0.5db, ant port (2) to rx port (3) less than 0.5db..happy with that, as I said it works well, but just wondered why on site tuning was flat. I appreciate the traditional way the unit works as you have described, I would like to try your way but my shift here is 1.6MHz and I do not have a duplexer for that sort of spacing ( although after the isolator, my cavs do a good job. Also Don, appreciate offer, but do have test gear at home to do it in passive mode so to speak. rgds Andy My understanding of British radio terminology is not complete, so I am a little confused by your statement about the receive port of the circulator. In circulator (isolator) applications I am familiar with, the input of the circulator connects directly to the transmitter output, the output of the circulator connects to the TX input cavity of the duplexer, and a 50 ohm load is connected to the side connector. Once the three capacitors (or six, on a dual circulator) have been adjusted on a network analyzer with the loads that will be used in service, there should be no reason to tweak any of the adjustments. In fact, I have been able to improve the performance of a circulator that was originally tuned with loads that were very close to 50 ohms, but was installed with loads that were between 51 and 53 ohms. This is one tuning job that a network analyzer can perform to a gnat's eyelash! If you were able to improve your repeater's operation by tweaking the circulator, I suggest that a better solution might be to tune your antenna and/or your duplexer to 50 ohms. It might be an interesting project to install a simple impedance matcher (Z-matcher) between the duplexer and the antenna. It's not clear where each component in your repeater system is installed, so perhaps you can elaborate on the arrangement? Specifically, where is the circulator installed? Thanks! 73, Eric Lemmon WB6FLY Andy Hearn wrote: HI I have just changed my 70 cm repeater antenna over to a co-linear 8 dBd gain, was running 2 full wave dipoles stacked (reason..antenna faults and not able to mount with correct vertical spacing). When I was calibrating the circulator on the bench, all set up perfectly, with the receive port being sharp in its setting. On site since the antenna was running a slightly higher VSWR compared to a dummy load (1.2:1), I thought it might be an idea to just tweak the receive port to optimise the rejection. However I found the tuning to be very flat, question, is this normal or am I missing something? 73 Andy G3UEQ 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: Happy radio day! - Happy 10-4 Day ...
I know... I got lost in the ten codes! :)) wb6ymh wrote: 10-33, 10-44 ? Your calendar appears to be different revision than mine :) --- In Repeater-Builder@yahoogroups.com, Mr. Edgar McKinney [EMAIL PROTECTED] wrote: What about the rest of the Ten codes? Like 10-7 or 10-33, or 10-41... Neil McKie wrote: Happy 10-4 day everyone ... ;) Neil - WA6KLA 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/
[Repeater-Builder] Off topic a bit.
Hello All, My lovely bride and I are takeing a week and going up to Canada for a week next month. What my question is. I want to plug in the police into my scanner to listen on the way up. Does any of you from the north know what frequensya the state police use in New York state? I we are going across the lower teir and I belive it is I-390 north to the NY thruway west to Bufalo NY then over in to Canada. Then does any one know any local frequecy in Nigra Canada? Some some thing to monitor while I drive smile Also any repeaters along the way? I have all the PA, and south stuff ready to dump from my computer to the Bearcat. Any good GMRS open repeaters along the way? (In the US) Thank you ahead of time for the help! Very best of 73, Russ, W3CH 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] Re: filter question
Morning Jim The price thing I mentioned was in relation to the new price, which in Tessco is about $1900 wholesale. I ended up NOT buying the duplexer by the way...I UPS'd it back to him. Your statement about his employment probably is correct. My word tech likely was in- accurate and his competance certainly is questionable at best...but he surely knows more than I, and most of you good folks here in this forum probabaly have forgotten more than I could ever hope to learn!!! Bob, GMRS WPVV845, Amateur KG4WAD, LMRS WPXC892 --- In Repeater-Builder@yahoogroups.com, Jim B. [EMAIL PROTECTED] wrote: . I wouldn't call that a good price for a used duplexer, especially since it obviously didn't work. I also suspect that, like most, he is not really a Motorola tech, but works for an independant dealer who services motorola (MSS). You will find widely varying degrees of competance, just as with any two-way radio shop. There are not as many *real* Motorola techs out there as one might think. Most are MSS's. -- 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] Does the R100 need duplexer if using two anetnnas?
Mike WA6ILQ wrote: At 12:46 PM 10/7/04, you wrote: Dakota Summerhawk wrote: I have a UHF R100 and need to know if I need a duplexer if I am going to be using two antennas. Can someone help? Thanks Dakota oh my...uh...the purpose of a duplexer is to combine a transmitter and receiver to one antenna so that they can operate simultaneously. Sooo, that would be a no... -- Jim Barbour WD8CHL Actually I have seen several cases where the T-cable in the middle was removed and two antennas plugged in. In some cases the RX antenna has been someone elses with a multicoupler added. Mike WA6ILQ Oh sure, absolutely, there's lots of other uses for duplexers, in fact our clubs UHF is setup that way, but the main purpose is combining a tx and rx onto one antenna. -- 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] Re: filter question
rtoplus wrote: Morning Jim The price thing I mentioned was in relation to the new price, which in Tessco is about $1900 wholesale. I ended up NOT buying the duplexer by the way...I UPS'd it back to him. Your statement about his employment probably is correct. My word tech likely was in- accurate and his competance certainly is questionable at best...but he surely knows more than I, and most of you good folks here in this forum probabaly have forgotten more than I could ever hope to learn!!! Bob, GMRS WPVV845, Amateur KG4WAD, LMRS WPXC892 Glad to hear you didn't get 'taken'. Yeah, there are plenty of really good techs at the 'mom pop' shops, but there are some bad ones too. Like anything else, there's good and bad. -- 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] Off topic a bit.
Russ, "welcome to Canada" ! you'll like it here ! If you are spening any time here be sure to exchange your US dollars for Canadian Dollars and do it at a bank.don't get hosed by retailers. Canadian banks will change it for you. Current exhange rate is $1.00 US = about $1.24 Canadian The offical rate is a bit better but they charge 1 - 2 % for buying your $$$ Check the repeater council freq. list at http://home.cogeco.ca/~wnysorc// You might really enjoy the Hammond Museum of Radio near Guelph Ont. If you can make it that far let me know and I'll arrange a tour for you. 73 John VE3AMZ - Original Message - From: russ To: Repeater-Builder@yahoogroups.com Sent: Friday, October 08, 2004 8:23 AM Subject: [Repeater-Builder] Off topic a bit. Hello All, My lovely bride and I are takeing a week and going up to Canada for a week next month. What my question is. I want to plug in the police into my scanner to listen on the way up. Does any of you from the north know what frequensya the state police use in New York state? I we are going across the lower teir and I belive it is I-390 north to the NY thruway west to Bufalo NY then over in to Canada. Then does any one know any local frequecy in Nigra Canada? Some some thing to monitor while I drive smile Also any repeaters along the way? I have all the PA, and south stuff ready to dump from my computer to the Bearcat. Any good GMRS open repeaters along the way? (In the US) Thank you ahead of time for the help! Very best of 73, Russ, W3CH 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] Does the R100 need duplexer if using two anetnnas?
At 10/7/2004 02:43 PM, you wrote: At 12:46 PM 10/7/04, you wrote: Dakota Summerhawk wrote: I have a UHF R100 and need to know if I need a duplexer if I am going to be using two antennas. Can someone help? Thanks Dakota oh my...uh...the purpose of a duplexer is to combine a transmitter and receiver to one antenna so that they can operate simultaneously. Sooo, that would be a no... -- Jim Barbour WD8CHL Actually I have seen several cases where the T-cable in the middle was removed and two antennas plugged in. In some cases the RX antenna has been someone elses with a multicoupler added. Mike WA6ILQ We do that here too on our 2 meter system. Allows us to use 2 antennas without much physical separation. 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] Off topic a bit.
Hey John we are not up there yet. We are coming up the week of 11/22/04 Thank you so much for the info! 73 Russ, - Original Message - From: John J. Riddell To: Repeater-Builder@yahoogroups.com Sent: Friday, October 08, 2004 9:51 AM Subject: Re: [Repeater-Builder] Off topic a bit. Russ, "welcome to Canada" ! you'll like it here ! If you are spening any time here be sure to exchange your US dollars for Canadian Dollars and do it at a bank.don't get hosed by retailers. Canadian banks will change it for you. Current exhange rate is $1.00 US = about $1.24 Canadian The offical rate is a bit better but they charge 1 - 2 % for buying your $$$ Check the repeater council freq. list at http://home.cogeco.ca/~wnysorc// You might really enjoy the Hammond Museum of Radio near Guelph Ont. If you can make it that far let me know and I'll arrange a tour for you. 73 John VE3AMZ - Original Message - From: russ To: Repeater-Builder@yahoogroups.com Sent: Friday, October 08, 2004 8:23 AM Subject: [Repeater-Builder] Off topic a bit. Hello All, My lovely bride and I are takeing a week and going up to Canada for a week next month. What my question is. I want to plug in the police into my scanner to listen on the way up. Does any of you from the north know what frequensya the state police use in New York state? I we are going across the lower teir and I belive it is I-390 north to the NY thruway west to Bufalo NY then over in to Canada. Then does any one know any local frequecy in Nigra Canada? Some some thing to monitor while I drive smile Also any repeaters along the way? I have all the PA, and south stuff ready to dump from my computer to the Bearcat. Any good GMRS open repeaters along the way? (In the US) Thank you ahead of time for the help! Very best of 73, Russ, W3CH 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] Off topic a bit.
Russ, Try this site. It lists freqs. for many states. Just click under NY at the top. Hope this helps. http://www.fordyce.org/scanning/travfreq.html Mike KA2NDW - Original Message - From: russ To: Repeater-Builder@yahoogroups.com Sent: Friday, October 08, 2004 8:23 AM Subject: [Repeater-Builder] Off topic a bit. Hello All, My lovely bride and I are takeing a week and going up to Canada for a week next month. What my question is. I want to plug in the police into my scanner to listen on the way up. Does any of you from the north know what frequensya the state police use in New York state? I we are going across the lower teir and I belive it is I-390 north to the NY thruway west to Bufalo NY then over in to Canada. Then does any one know any local frequecy in Nigra Canada? Some some thing to monitor while I drive smile Also any repeaters along the way? I have all the PA, and south stuff ready to dump from my computer to the Bearcat. Any good GMRS open repeaters along the way? (In the US) Thank you ahead of time for the help! Very best of 73, Russ, W3CH 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] Off topic a bit.
If you have a PRO-96, there is a Niagara region (USA and CA) file on the PRO-96 Yahoo Group. Also, make sure you have a copy of your license in case you get stopped in NY and don't have the PD frequency blairing (shut the scanner off). From memory, the western part of the state all uses 155.505 and 155.535 for NYSP. NYS THRUWY A 453.42500 CT 123.0 D NYS THRUWY B 453.52500 CT 123.0 D NYS THRUWY 3 460.31250 CT 0.0 D NYS THRUWY 4 460.36250 CT 0.0 D NYS THRUWY 5 460.58750 CT 0.0 D NYS THRUWY 6 460.61250 CT 0.0 D NYS THRUWY 7 460.63750 CT 0.0 D NYSP CH 1 BA 155.50500 CT 0.0 D NYSP CH 1 MO 155.53500 CT 110.9 D NYSP C-C F2 154.66500 CT 110.9 D NYSP F3 BOLO 154.69500 CT 110.9 D NYSP F4 RADA 155.56500 CT 110.9 D NYSP F4 RADA 155.56500 CT79.7 D NYSP F5 MAid 155.37000 CT 0.0 D NY SPERN F6 155.47500 CT 0.0 D NYSP CH 6155.07000 CT 0.0 D NYSP F7 TAC1 154.92000 CT 110.9 D NYSP F8 TAC2 155.62500 CT 110.9 D NYSP B-B 42.14000 CT 0.0 D I'll paste a complete file to you direct. Joe M. russ wrote: Hello All, My lovely bride and I are takeing a week and going up to Canada for a week next month. What my question is. I want to plug in the police into my scanner to listen on the way up. Does any of you from the north know what frequensya the state police use in New York state? I we are going across the lower teir and I belive it is I-390 north to the NY thruway west to Bufalo NY then over in to Canada. Then does any one know any local frequecy in Nigra Canada? Some some thing to monitor while I drive smile Also any repeaters along the way? I have all the PA, and south stuff ready to dump from my computer to the Bearcat. Any good GMRS open repeaters along the way? (In the US) Thank you ahead of time for the help! Very best of 73, Russ, W3CH --- 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. 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] Repeater Maker
Question-- Sorry if has been asked before. Will two separate Maxtrac/Maratrac make into a good UHF ham repeater?? What are the pitfalls or things to watch out for? Asking for a friend. Thanks Dale K0JXI 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/
