Re: [Repeater-Builder] Polyphaser Question
Lightning protection is not simply a surge protector but a system of surge protectors, grounds and installation techniques that may reduce the effects of a nearby lightning event. And as Chuck says unless you install a lightning/grounding system the effect of a single device is negligible. Bill - WA0CBW In a message dated 8/18/2010 8:05:20 A.M. Central Daylight Time, wb2...@roadrunner.com writes: OK, yes, you have severely limited your chances of being protected. I'd hazard a guess that it would be a fraction of a percent better than having no protection at all. Your condom has a hole in it ;-) Chuck WB2EDV - Original Message - From: Joe k1ike_m...@snet.net To: Repeater-Builder@yahoogroups.com Sent: Wednesday, August 18, 2010 8:34 AM Subject: Re: [Repeater-Builder] Polyphaser Question I don't think that you have necessarily wasted your time, but you have severely limited your chances of decreasing lightning damage. It's like replacing 3 tires on your car that has 4 bad tires, you've bettered your odds but it is not the best fix. I have a site that the owner would throw me off if I started installing single;e point grounding and all kinds of wiring. I use a grounded Polyphasor in hopes that it will decrease my odds of lightning damage. Yes, the purist will say that this is wrong, but it's not my site and I'm a guest. That's the deal and I accept it. It's a case of something is better than nothing. 73, Joe, K1ike On 8/17/2010 10:42 PM, Chuck Kelsey wrote: Leave one unprotected path available and you've wasted your time. Chuck WB2EDV Yahoo! Groups Links
Re: [Repeater-Builder] Re: Advanced Communications Systems Mark 4 repeater / ...
You might try and reseat all the ribbon connectors. They can become intermittent. Does the request for the time work? Bill - WA0CBW In a message dated 7/23/2010 2:00:49 P.M. Central Daylight Time, kc5...@live.com writes: I found the audio board drawing on repeater-builder. Thanks I have a new problem now, the unit sent some kind of alarm tones, and now the multifax and message master seem to be not functioning. The machine still ID's in c/w and repeats, but the rest of the controls seem to be down. I'm not 100% sure where to start looking. I tried hooking TB-16 and 17 to ground and restarting, but seems this did not reset back to blank as I still have an ID. I'm not sure the unit is responding to tones or not, I have not tried to command an output, but I'm pretty sure it will not. Any ideas? Eddie Yahoo! Groups Links
Re: [Repeater-Builder] MSR2000
The squelch gate card control tells the transmitter when to transmit. The squelch control on the R1 audio module gates the receiver squelch noise. Bill In a message dated 7/6/2010 8:01:31 A.M. Central Daylight Time, wa2...@taconic.net writes: Yesterday I finally plugged this MSR2000 in with a dummy load on it. It came on with an open squelch and went right into transmit mode. The squelch control on the squelch gate card did not close the squelch. I cannot find any way to close the squelch. If I pull the squelch gate card out it quiets the squelch. I hope it is not a defective squelch gate card. Any thoughts? This is my first experience with the MSR2000. Thanks Stan, WA2UET
Re: [Repeater-Builder] MSR2000
Stan, Ugh! That will make it extremely difficult to figure out what is going on. What cards are in the cage? Typically it should have PL card and R1 Audio card (these are installed horizontally above the normal vertical cards), Squelch gate card and Station control card. It might also have a time out card and Line card. Is the pacific research controller with the repeater? I'm not sure where to tell you to start. Examine each card for any mods. Collect as much documentation as you can about what was done. Basically a controller requires a COR signal from the receiver, a PTT to the transmitter, Receiver audio going to the controller, TX audio from the controller to the transmitter, and a PLL indicate. If the controller is still there you can work backwards from there. There are several places where these signals are available. Either on individual cards or from the backplane. Look for additional jumpers on the backplane. In original condition there are NO jumpers from any of the backplane pins. Get yourself some manuals. I can try to help you as much as I can. The receive signal flow is from the receiver to the R1 audio card. This card has the local volume control and the squelch control. It provides the audio amp and squelch circuitry for the receiver. From the receiver the signal also goes to the PL and Squelch gate card. The PL card decodes (and provides receiver filtering if so jumpered) PL and sends it to the Squelch gate card. The squelch gate card processes the audio from the R1 card and sends it to the transmitter. It also provides the transmitter keying signal. The keying signal goes to the Station control card through the front panel card controls. From there it goes to the transmitter. There is also circuitry for delaying the de-key of the transmitter to accomodate the reverse PL burst. Bill - WA0CBW In a message dated 7/6/2010 9:03:12 A.M. Central Daylight Time, wa2...@taconic.net writes: Thanks Bill, But that control does nothing either. This repeater was used with a Pacific Research controller before that has a squelch circuit built in. It did not come with a squelch card. I don't know where to look for the problem... Stan From: _william...@aol.com_ (mailto:william...@aol.com) Sent: Tuesday, July 06, 2010 9:31 AM To: _repeater-buil...@yahoogroups.com_ (mailto:Repeater-Builder@yahoogroups.com) Subject: Re: [Repeater-Builder] MSR2000 The squelch gate card control tells the transmitter when to transmit. The squelch control on the R1 audio module gates the receiver squelch noise. Bill In a message dated 7/6/2010 8:01:31 A.M. Central Daylight Time, _wa2...@taconic.wa2_ (mailto:wa2...@taconic.net) writes: Yesterday I finally plugged this MSR2000 in with a dummy load on it. It came on with an open squelch and went right into transmit mode. The squelch control on the squelch gate card did not close the squelch. I cannot find any way to close the squelch. If I pull the squelch gate card out it quiets the squelch. I hope it is not a defective squelch gate card. Any thoughts? This is my first experience with the MSR2000. Thanks Stan, WA2UET
Re: [Repeater-Builder] Re: Quantar Simulcast Issue
Optimization of a simulcast system is critical to its proper operation. Not every local Motorola shop has the equipment or experience to perform this activity. I have installed many simulcast systems over the years and it always boiled down to incorrect system optimization (excluding equipment failure of course). If it is a Motorola project a System Technologist (ST) would be assigned along with a project manager. Contact the project manager with your findings and he will assist you in rectifying the problem. Now if it is a local Motorola Shop project then all bets are off. Depending on the status of the shop they may not be able to buy the parts from Motorola to build a Motorola simulcast system. There are other simulcast designs and hardware available but they are not of the Motorola design described by WB0EMU. This is a tried and true design that has been implemented over and over with excellent results.As said below proper Quantar programming, netting, and Mod-comp adjustment are critical. Bill ex Motorola Project Manager In a message dated 6/23/2010 10:20:20 P.M. Central Daylight Time, wb0...@arrl.net writes: --- In Repeater-Builder@yahoogroups.com, wmhpowell w...@... wrote: I'm looking for some Quantar engineering level help re: an interesting simulcast issue. ... Thanks, Bill Powell -- When you say this system was set up and installed by Motorola - does that mean a 'factory direct' Motorola project or a local dealer? Is the baffled tech a shop tech or a Motorola employee [e.g. S.T.]? You say the system is GPS stabilized - do you mean what Motorola refers to as GPS Simulcast? If so, the transmit path would originate at a prime site where voted receive and/or dispatch transmit audio would be routed to a CSCI or USCI, then to an SDA, then to a Premysis TeNSr channel bank into DSM-II cards, then over T-1 paths to each remote site where channel banks with corresponding DSM cards connect to the wideband simulcast Quantar tx inputs. The GPS reference clocks, typically from Trak, provide 5 MHz reference to the Quantar stations and 1PPS timing to the DSM's which automatically time align the transmit audio. This is a proven working product. The hypothesis regarding lack of DC restoration in the modulator would suggest a design issue which is highly unlikely given the number of succcessfully fielded Quantar simulcast systems. If you are going to investigate this issue you should begin with the most current version of the Motorola GPS Simulcast manual: 6881098E65. On the other hand, it this system was implemented by a local dealer using some other form of simulcast distribution such as Harris SynchoCast - there could be any number of issues. In any case - proper Quantar programming, netting, and Mod-comp adjustment are critical. Audio phasing and level optimization is best verified using a DSA [Dynamic Signal Analyzer] such as the Agilent 35670A. Yahoo! Groups Links
[Repeater-Builder] MURS Frequencies
Below are some of the technical specifications for the MURS frequencies from the FCC web site. Notice that the bandwidths of the first three frequencies are different than the last two. Not all radios are capable of these bandwidths. Bandwidth The frequencies available in the Multi-Use Radio Service are: Frequencies Authorized Bandwidth 151.820 MHz 11.25 KHz 151.880 MHz 11.25 KHz 151.940 MHz 11.25 KHz 154.570 MHz 20.0 KHz 154.600 MHz 20.0 KHz Emissions A MURS transmitter must transmit only emission types A1D, A2B, A2D, A3E, F2B, F1D, F2D, F3E, G3E. Emission types A3E, F3E and G3E include selective calling or tone-operated squelch tones to establish or continue voice communications. MURS transmitters are prohibited from transmitting in the continuous carrier mode. The authorized bandwidth for any emission type transmitted by a MURS transmitter is specified as follows: * ALL A3E emissions are limited to 8 kHz. * Emissions other than A3E on frequencies 151.820 MHz, 151.880 MHz, and 151.940 MHz are limited to 11.25 kHz. * Emissions other than A3E on frequencies 154.570 and 154.600 MHz are limited to 20.0 kHz. * MURS transmitters shall be designed to comply with the emission masks described in _47 CFR 95.635_ (http://wireless.fcc.gov/rules.html) .
Re: [Repeater-Builder] Slightly OT: How are folks taking audio from multiple ...
I use a Motorola amplified speaker and an audio combiner circuit. Since some of the newer radios don't like to have either of their speaker leads grounded I had to design a circuit that not only combined the audio but also isolated the speaker leads from ground. What I came up with was to use audio isolation transformers for each radio. A shielded audio cable goes from the speaker jack on the radio to each isolation transformer. Each transformer has an 8 ohm 1 watt resistor in parallel with the primary. This provides an 8 ohm load for each radio. These transformers are also available at Radio Shack. The secondary of each transformer has one lead grounded and the other lead goes to a resistor. Each transformers secondary lead with the resistor is tied together and feed the input of the Motorola amplified speaker. This is a simple resistive mixing network that isolates each radio not only from each other but from ground as well. Since this is a passive circuit there is some loss but the amplified Motorola speaker more than makes up for it. In actual use the volume level on each radio is just a little less than if you were using the internal speaker. And turning up the audio about 3/4 of the way produces enough audio to drive you out of the car. The disadvantage is as noted that all the audio comes from the same place and it is necessary from time to time to look at the radios to see which one is receiving. However if each radios volume is set at slightly different levels it is easy to determine which one is active. This has also been tried with the amplified Radio Shack speaker with almost the same results. It is pretty hard to beat the amplified Motorola speakers for loudness and clarity. Bill - WA0CBW In a message dated 4/10/2010 8:32:04 P.M. Central Daylight Time, mike.l...@gmail.com writes: Hello Folks, I am wondering what people are doing these days with multiple two-way radios and scanners in their vehicle and then outputting it to one speaker in the vehicle? How are they isolating each radio? Thanks, Mike
Re: [Repeater-Builder] FCC Ant Registration
Use the FCC ULS search feature. From the ULS page select find license. From that page on the right hand side select Site based search. This will bring up a form that you can search on several items including the ASR number. The result will be the call signs of everyone on that tower. Bill In a message dated 1/15/2010 8:23:07 A.M. Central Standard Time, wb8...@netzero.net writes: Is there a way from an ASR no. to look up all of the registered liscenses for that site? Randy Yahoo! Groups Links
Re: [Repeater-Builder] R2001D (A13) card
Looking at the manual there is no A13 card in the D model. The frequency reference on the D model is the A16 card. Looking at the manual the C model has an A13 card and it is the 10 MHz frequency reference. Hope that helps. Bill - WA0CBW In a message dated 12/22/2009 10:28:32 A.M. Central Standard Time, v44...@caribsurf.com writes: Thank you Erick, v44kai.Joel. - Original Message - From: Eric Lemmon wb6...@verizon.net To: Repeater-Builder@yahoogroups.com Sent: Tuesday, December 22, 2009 11:25 AM Subject: RE: [Repeater-Builder] R2001D (A13) card Sorry, no. I have no knowledge of this equipment. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Joel Sent: Tuesday, December 22, 2009 9:18 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] R2001D (A13) card Thanks Eric, Can you tell me anything about the A13 card? v44kai.Joel. - Original Message - From: Eric Lemmon wb6...@verizon.net mailto:wb6fly%40verizon.net To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tuesday, December 22, 2009 11:08 AM Subject: RE: [Repeater-Builder] R2001D (A13) card Joel, FYI, the Maintenance Manual is publication 6881069A63. Unfortunately, this manual is out of print, but you may be able to find one at an Internet auction site, now that you know the manual part number. You might consider posting your request on the Test Equipment site, test-equipm...@mailman.qth.net mailto:test-equipment%40mailman.qth.net , and on the Land-Mobile Radio site, l...@yahoogroups.com mailto:LMR%40yahoogroups.com . 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Joel Sent: Tuesday, December 22, 2009 8:11 AM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ; amateur-repa...@yahoogroups.com mailto:amateur-repairs%40yahoogroups.com ; manual_excha...@yahoogroups.com mailto:manual_Exchange%40yahoogroups.com Subject: [Repeater-Builder] R2001D (A13) card Good day to all, This is posted on 3 groups, this indicates my quest for answers (I apologize if this offends anyone on any of the groups) I just can find a group that deals with this beast (R2001D) A bit off topic, but I'm sure someone here (as some here have the Motorola R2001D service monitor) can answer my questions I've asked on other groups, without answer. I received a R2001D that doesn't work, only the oven ready let lit up, and I have the a ten (10 MHz) signal out on the BNC terminal on the back. On opening it up I realize there's an empty slot (A13) now my questions. 1..Does this model require the A13 card? From what I understood the A13 card is the 10 MHz oscillator card in earlier models, please answer. 2..Since I have the 10 MHz signal does this tells me that the A13 card for this model is an option, or the A13 card slot here is a different card function? Please answer 3..Is there a R2001D group for this unit? Please answer. 4..Is there a free service manual available for download (I don't want to buy a manual if I need to have the A13 card installed) as I don't have it, and don't know where to find one now, even to borrow. I don't know anything about this unit, someone was able to send me the operating manual, he doesn't have a R2001D nor does he have the service manual. My main concerns are the A13 card, before I start to check for other problems. I will appreciate any help here, thanks in advance. v44kai.Joel. Yahoo! Groups Links -- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.430 / Virus Database: 270.14.117/2581 - Release Date: 12/22/09 08:09:00 Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.430 / Virus Database: 270.14.117/2581 - Release Date: 12/22/09 08:09:00 Yahoo! Groups Links
Re: [Repeater-Builder] Need help finding info on TX RX boards - maybe old ...
I believe those are VHF Engineering boards, not Hamtronics. They were available as a kit. The receiver consisted of 4 strips. A front end (2-meter, 220, and I think 440), a 10.7 IF, a 455khz IF, and an audio amplifier/squelch board. The transmitter/exciter was about 1 watt. I think I have the schematics and documentation for them. I'll check when I get home from work this evening. My first repeater was a VHF Engineering kit for 220. It went on the air in 1976 and has been on ever since (the VHF engineering stuff was long ago replaced). It is the oldest 220 machine in the Kansas City Area. Bill - WA0CBW In a message dated 12/9/2009 8:30:18 P.M. Central Standard Time, dmatyja2...@yahoo.com writes: If anyone can take a look at the image in the FILES section called hamtronicsR10576.jpg. I think this is an older hamtronic TX RX strips. The RX has the markings of R10576. On the left in the image is the RX with the xtal in the upper left corner. On the right is the TX strip. I want to re-xtal these strips. These are 220 mhz boards. Thanks for any help. -Dan WA6PZB Yahoo! Groups Links
Re: [Repeater-Builder] Re: MSR 2000 Repeater
The meter plug plugs in from the back of the back plane. Not through the PL board slot. Fold out the card cage and the meter sockets are available from the backplane. BillB In a message dated 9/20/2009 7:08:35 A.M. Central Daylight Time, hkl...@nc.rr.com writes: --- In Repeater-Builder@yahoogroups.com, skipp025 skipp...@... wrote: When you remove the PL Module from the back plane you lose the reverse burst CTCSS (PL) function. What advantage would you have/get from using a TS-32 tone board? You can download the external controller on an MSR-2000 repeater information from the www.radiowrench.com/sonic web page and it will tell you how to make the repeater operate carrier squelch. First off... there are two jumpers on the Squelch Gate Module that need to be moved over to carrier squelch or the TS-32 needs to source the proper signals to the SQM so it will operate. s. Howard Klino hklino@ wrote: I have gotten a MSR2000 repeater working with the the PL card in it.I do not want to use this card as I have installed a TS-32 board. When I remove the PL card, both transmit and receive are disabled. What do I jumper to stop this from happening. It blocks me from using the meter jack for the transmitter. Howard K2IMO First let me say that the unit was not originally a repeater. It was a base station on EMS freqs. It did not have a squelch card in it. I did another conversion to it that required a TS-32 or TS-64 so I put it in. I wanred both incode and decod capabilities. It has a CAT controller mounted where the second receiver should be. Everything works great and has for over a year. Now back to the original question. In order to use the metering socket for tune-up of the transmitter, you have to trmove the PL card which is mounted just below the transmitter. When doing this, you lose transmit capabilities and receive. Once you plug in the test meter, you can no longer put the PL card back in. What I need to know is what lumpers do I have to put in inorder to be able to transmit and receive with the PL card removed. I have no documentation on the boards. HowardK2IMO Yahoo! Groups Links
Re: [Repeater-Builder] Re: Motorola MTR2000 Question
I believe the MTR can only do one tone code at a time. bb In a message dated 8/13/2009 9:19:46 P.M. Central Daylight Time, maire-rad...@verizon.net writes: how about one repeater but different tone codes? or the repeater is at some other location. John - Original Message - From: _Christopher Hodgdon_ (mailto:chris.hodg...@kaufman-ares.org) To: _repeater-buil...@yahoogroups.com_ (mailto:Repeater-Builder@yahoogroups.com) Sent: Thursday, August 13, 2009 8:43 PM Subject: [Repeater-Builder] Re: Motorola MTR2000 Question I wish I had a picture of the repeater house. The frequency listed on the MTR2000 is that of the schools maint. department. The other MTR2000, hook to the other antenna, is the Schools PD. I know those for a fact. Now its time to locate the other repeater system. The only odd ball thing I do know is that every once in a while, when a bus is talking to another bus or dispatch, you get a high squeal walk on over them, but its most likely another drive not paying attention and trying to key their radio. But I wonder if it might be the maint. since their frequency is so close to ours. --- In _repeater-buil...@repeater-buirep_ (mailto:Repeater-Builder@yahoogroups.com) , Gary n6...@... wrote: The UHF repeater is likely mismarked or the frequency info you obtained for your school's license is inaccurate. The UHF repeater is likely the school's repeater. As mentioned earlier the MTR2000 is a multi-channel radio but can only repeat on the channel it is left on. Recommend you find a dealer or tech experienced with the MTR and who has the software necessary to configure it. Have them download its codeplug. Recommend you do the same with your school radios. A comparison of the data will likely answer a lot. Gary -Original Message- From: _repeater-buil...@repeater-buirep_ (mailto:Repeater-Builder@yahoogroups.com) [mailto:_repeater-buil...@repeater-buirep_ (mailto:Repeater-Builder@yahoogroups.com) ] On Behalf Of Christopher Hodgdon Sent: Thursday, August 13, 2009 4:29 PM To: _repeater-buil...@repeater-buirep_ (mailto:Repeater-Builder@yahoogroups.com) Subject: [Repeater-Builder] Re: Motorola MTR2000 Question Here's the deal, I work for a local school district, I have been kind of thrust into a temp. communications specialist position while we obtain some new buses and working with the company that will be adding the new radios to them. Over the last few weeks, we have been trying to determine the location of our repeater. The place were it is listed on the FCC license paperwork does not exist. I know, I am pushing them to get it updated. But that is another story all together. I do have access to a radio house located at our high school football field and it has two MTR2000 in it, plus two different antennas. One connected to one radio and one connected to the other. One radio is marked with the description of KISD PD, which is our police department for the district and has the following frequency pair listed on it: VHF: RX 173.325 DPL 331 and TX 158.385 DPL 331 The other radio is marked the following: UHF: 451.725 / 456.725 There is no documentation with this equipment, the person incharge of them originally left the district some years ago and no one knows anything about them, expect where they are located, as far as these two boxes go and what frequencies that have listed. Which brings me back to our department, we can find out repeater located anywhere physcially. Our repeater pair is listed as: UHF: 451.750 / 456.750 That is according to FCC, repeater listing and other information I have been able to obtain and by listening to it on a UHF amateur radio to see which frequency they were on. That being said, it is possible that the MTR2000 that is marked with the one UHF frequency, might actually have both pairs programmed into it, but only one can run at a time, right? Is there a way to find out if there is more than one frequency is programmed into the unit and if so, how might we go about that? Another reason I am asking is that we might be upgrading our system in the very near future and I might be able to get my hands on these repeaters. Thanks in advance. --- In _repeater-buil...@repeater-buirep_ (mailto:Repeater-Builder@yahoogroups.com) , Brian Raker brian.raker@ wrote: The radio can be programmed for multiple frequency pairs. That being said, it cannot operate more than one channel / programmed pair of frequencies at one time. -Brian / KF4ZWZ On Thu, Aug 13, 2009 at 3:23 PM, Christopher Hodgdonchris.chris.W wrote: This is a question I have been asked and don't have an answer for. This could be for either amateur operation or commercial operation, but it relates to the repeater itself. Can a Motorola MTR2000 setup on UHF be setup to
Re: [Repeater-Builder] Narrow banding question
Narrow banding only affects VHF and UHF users. bb In a message dated 8/6/2009 3:28:03 P.M. Central Daylight Time, hitekgearh...@hotmail.com writes: I have a question relating to the upcoming narrowbanding I have been hearing about as it relates to surplus equipment. Does the narrowbanding effect just 700, 800, 900MHz trunked systems? Or is it across the board, including all commercial VHF and UHF users? I was just curious as to what surplus equipment might be available in the near future as a result. Thanks Yahoo! Groups Links
Re: [Repeater-Builder] Rule Question
Control stations are designated as FX1 for the station class on the FCC license. Under the 6.1 meter rule their location may also be designated as operating XX kilometers around a specific geographic location or county wide or state wide etc. Antennas mounted higher than 6.1 meters require specific geographic coordinates for the location of each station. Bill - WA0CBW In a message dated 4/29/2009 8:19:34 P.M. Central Daylight Time, demo...@rollanet.org writes: You can have a bunch, but they have to be listed: (b) If the control station(s) will operate on the same frequency as the mobile station, and if the height of the control station(s) antenna(s) will not exceed 6.1 meters (20 feet) above ground or an existing man-made structure (other than an antenna structure), there is no limit on the number of such stations which may be authorized. Appropriate items on FCC Form 601 shall be completed showing the frequency, the station class, the total number of control stations, the emission, and the output power of the highest powered control station. Chris Kb0wlf -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of Bill Powell Sent: Wednesday, April 29, 2009 6:30 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Rule Question I know it's off-topic but I needed a starting place. Please refer me to someplace appropriate instead of flames. I'm looking for clarification on 6.2m control stations. I'm being told (by a dealer) that, in the eyes of the FCC, they are treated the same as a mobile and do not need to be included in the license. I think I'm being shoveled a fresh load... Tkx, Bill - WB1GOT Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.287 / Virus Database: 270.12.8/2086 - Release Date: 04/29/09 06:37:00 Yahoo! Groups Links **Big savings on Dell XPS Laptops and Desktops!(http://pr.atwola.com/promoclk/100126575x1220631276x1201390200/aol?redir=http:%2F%2Fad.double click.net%2Fclk%3B214101948%3B35952020%3Bv)
Re: [Repeater-Builder] Fw: [DSTAR_DIGITAL] FCC Ruling on Repeater Definition
It is a simplex operation but in the commercial world it is called store and forward. Bill - WA0CBW In a message dated 3/25/2009 7:28:55 A.M. Central Daylight Time, dmur...@verizon.net writes: If it transmits and receives on the SAME frequency (SIMPLEX). David On Tue, Mar 24, 2009 at 6:34 PM, Jeff Condit wrote: What do you call it when messages are recorded and then retransmission begins right after reception ends? By this definition it would not constitute a simplex repeater, right? Jeff Condit - Original Message - From: _Tom Azlin, N4ZP T_ (mailto:n4...@cox.net) (mailto:n4...@cox.net) To: _Repeater-Builder@ yahoogroups. com_ (mailto:Repeater-Builder@yahoogroups.com) (mailto:Repeater-Builder@yahoogroups.com) Sent: Tuesday, March 24, 2009 8:02AM (mailto:Repeater-Builder@yahoogroups.com) Subject: Re: [Repeater-Builder] Fw: [DSTAR_DIGITAL] FCC Ruling on Repeater Definition (mailto:Repeater-Builder@yahoogroups.com) (mailto:Repeater-Builder@yahoogroups.com) (mailto:Repeater-Builder@yahoogroups.com) Hi Kris, A D-STAR repeater never decodes the voice, it just bitregenerates the signal back to the data stream. Yet it is a repeater forsure per the FCC. I would say a linear transponde r or translator is arepeater also. the transmit part is active while the receive part ispicking up the signal. 73, Tom n4zpt Kris Kirby wrote: The only interesting wrinkle in this is that a linear transponder doesn't retransmit . The signal is never decoded to baseband and retransmitted. Or is it? With I+Q demodulation and remodulation, this could be a point of argument. -- Kris Kirby, KE4AHR Disinformation Analyst (mailto:Repeater-Builder@yahoogroups.com) (http://us.ard.yahoo.com/SIG=14hblhg3p/M=493064.12016306.12445698.8674578/D=groups/S=1705063108:NC/Y=YAHOO/EXP=1237951773/L=/B=jmmBxUPDhEE-/J=1237944573002 579/K=n5D6xeNkvRMPlukywGfMiA/A=5579904/R=0/SIG=110vban8o/*http://www.handsonne twork.org/) **Feeling the pinch at the grocery store? Make meals for Under $10. (http://food.aol.com/frugal-feasts?ncid=emlcntusfood0002)
Re: [Repeater-Builder] Fwd: [Hamvention] Events - Request For Input
Sounds like fun. I would like to put a face with the names. Bill - WA0CBW In a message dated 3/17/2009 10:03:51 P.M. Central Daylight Time, n...@no6b.com writes: Do we want to schedule a Repeater-Builder dinner @ Dayton or some other similar event? Sounds like now's the time. Bob NO6B To: hamvent...@yahoogroups.com From: KE4WLE ke4...@ke4wle.no-ip.org Date: Tue, 17 Mar 2009 17:32:07 - Subject: [Hamvention] Events - Request For Input Reply-To: hamvent...@yahoogroups.com This is a reminder that Hamvention is seeking information about Hamvention-related events! If your group/club/association/organization has an event scheduled around Hamvention and would like it posted on the Hamvention web site (http://hamvention.org/events.php) please contact the Webmaster using the form link located on the Contact Us page (http://hamvention.org/contact.php) To request the placement of an event in the printed program, please contact prog...@hamvention.org. Thanks! R- 73 de ke4wle Yahoo! Groups Links **Feeling the pinch at the grocery store? Make meals for Under $10. (http://food.aol.com/frugal-feasts?ncid=emlcntusfood0002)
Re: [Repeater-Builder] Re: Motorola MSR-2000 to external repeater controller
I have used this method of converting many MSR2000 and it works great! Especially if you want to keep it somewhat in its original condition. I have taken the mod and added a jumper plug to the DB connector, I left the components on the board and added a return wire from them to the jumper. This allows me to remove the controller for service or programming and still keep the repeater on the air. Thanks for doing the all the engineering work! Bill - WA0CBW In a message dated 2/25/2009 9:06:04 A.M. Central Standard Time, skipp...@yahoo.com writes: Hi Grant, To answer your question... Not really, The classic method of using the line driver module is commonly called wire line control. The line driver normally outputs the receive signal (audio) and could contain some tone/dc information if it's set up with certain options. The transmit (input) side of the line driver is looking for a tone sequence or DC Current loop keying along with the TX audio. There are a number of methods to interface various Motorola Repeaters. I have an external repeater controller to MSR-2000 (and it's pretty much the same thing for the Micor) interface article on the www.radiowrench.com/sonic web page. http://www.radiowrench.com/sonic/so02004.html ... and back to the main sonic page for the sqlgate.zip file download. I've recently relocated the page and files to a new server so not all the other downloads are available (yet). http://www.radiowrench.com/sonic cheers, s. Grant g...@... wrote: I have been told I can interface two repeaters together using the line driver card. Anyone on here ever tried that?? Yahoo! Groups Links **You're invited to Hollywood's biggest party: Get Oscars updates, red carpet pics and more at Moviefone. (http://movies.aol.com/oscars-academy-awards?ncid=emlcntusmovi0001)
Re: [Repeater-Builder] Re: Astron P/S question
I have an Astron RM-35M (35Amp) that I just tested by shorting the output and it doesn't blow the fuse. I think I would be looking for something in the primary circuit that might be shorting like the transformer primary or the surge arrestor or maybe the wiring. I have seen transformers that short after they warm up a little. Bill - WA0CBW In a message dated 12/25/2008 10:11:11 P.M. Central Standard Time, lar...@hotmail.com writes: --- In Repeater-Builder@yahoogroups.com, Chuck Kelsey wb2...@... wrote: I have an old Bullet power supply built from a kit (anyone remember those?) that uses the 723. You can short the output time and time again and it simply folds back. heheheh I have one of those still in service on a repeater. Re-capped it a year ago and it still works fine. As I recall a shorted output simply folds back, like you say. I also have two Astrons here on the bench. One is a VS12, the other is a RS12. When the output is directly shorted with heavy wire they both simply fold back. Shorted them dozens of times; never a blown fuse. Laryn K8TVZ Yahoo! Groups Links **Don't be the last to know - click here for the latest news that will have people talking. (http://www.aol.com/?ncid=emlcntaolcom0021)
Re: [Repeater-Builder] Kendecom Mark 4 CR Controller Audio Low
I think the adjustment you are looking for is R19 on the Micro Fax Board. It is located next to U6 about in the middle of the board. Bill - WA0CBW In a message dated 12/5/2008 7:54:52 P.M. Central Standard Time, [EMAIL PROTECTED] writes: I don't have documentation on the controller of this repeater. Does anyone know where the adjustment is to turn up the synthesized voice on this repeater. Any help would be greatly appreciated. If anyone has the hardware manual for the Mark 4 CR please let me know. Thanks 73's Gary K2ACY Yahoo! Groups Links **Stay in touch with ALL of your friends: update your AIM, Bebo, Facebook, and MySpace pages with just one click. The NEW AOL.com. (http://www.aol.com/?optin=new-dpicid=aolcom40vanityncid=emlcntaolcom0012)
Re: [Repeater-Builder] How to set up a basic crossband repeater system in Pub...
Also check to be sure the FCC license reflects the locations, type of service (FB; FB2; or MO) and power levels being proposed for the VHF frequency. Bill - WA0CBW In a message dated 11/29/2008 1:47:44 P.M. Central Standard Time, [EMAIL PROTECTED] writes: My local Community Emergency Response Team (CERT) has recently obtained a UHF repeater (ICOM CY-F221S). It has two ICOM F221S radios linked together in a nice rack mount box. It has also been set up with a remote mic and speaker off of the outputs on the chassis back panel. The CERT group is licensed for the UHF repeater frequencies and they are in the public service band. They also have a simplex VHF frequency in the PS band (old police frequency) licensed. They have a number of Motorola HT radios (CP200) that operate on the simplex VHF frequency. They are looking at obtaining additional UHF HT radios in the future but would like to be able to use the equipment they have if they can get it to work together. I am familiar enough with electronics to be able to follow directions, but not enough to design anything beyond a basic switch box. I am a network engineer professionally so I am pretty well versed in those areas, and understand logic control pretty well. I am a technician class ham, but don't know a lot about RF as I have not had that much experience in it. I would like to accomplish the following and would love to receive some guidance from someone who has the knowledge to instruct me: I would like to set up a cross band link for them from the UHF repeater, to a VHF radio: This would allow someone on the UHF side to transmit to the repeater, and also cross-band repeat to the VHF side. The VHF side would be able to transmit on the VHF simplex frequency to the cross band side, and it would repeat onto the UHF side. I realize that this would NOT provide VHF to VHF repeating, and that is okay. I want to provide a way that the cross band link can be enabled and disabled by remote DTMF tones so that the bands can be separated when desired. I already have an old Motorola Spectra police radio operating on the VHF side at the site, and it has a dedicated antenna. It puts out 110W which is way too much for what we need. I was thinking about getting an ICOM F121S radio, Astron power supply, and ICS basic controller board. Using the existing VHF antenna, I would hook up the new ICOM (50 watts or less). Now I just need to tie the ICOM repeater, controller, and new radio together into a cross band system of sorts. Am I on the right track? I need some general guidance that can tell me, try this, this, and this. Here is what equipment you could use, and here is how you could tie it together. I have the schematics for the repeater available to me. If I don't want to spend the money for a new ICOM F121S radio, then what else could I connect easily that I can program and would be able to get at a reasonable price. This is all being done as volunteer service so inexpensive is best, but I want to avoid cheap equipment. Thanks for any help you could provide me, 73 Bryan Carter KE7GVJ Kaysville CERT Administration Yahoo! Groups Links **Finally, one site has it all: your friends, your email, your favorite sites. Try the NEW AOL.com. (http://www.aol.com/?optin=new-dpicid=aolcom40vanityncid=emlcntaolcom0006)
Re: [Repeater-Builder] MTR 2000
Mike, You are correct. I fell into the same trap as our customers identifying anything digital as P25. Thanks for the correction. Bill In a message dated 11/24/2008 12:15:17 P.M. Central Standard Time, [EMAIL PROTECTED] writes: Bill, I think you mean that the MTR is to get the TDMA MotoTrbo board upgrade two slot TDMA option. Mike K7PFJ -- Original message -- From: [EMAIL PROTECTED] The MTR 2000 is on Motorola's roadmap to get a P-25 upgrade option in the next couple of years. Bill - WA0CBW In a message dated 11/24/2008 10:26:53 A.M. Central Standard Time, [EMAIL PROTECTED] a messag Eric Lemmon wrote: John, I certainly can't dispute the fact that an MTR2000 repeater is far more expensive than a TKR-850 repeater, nor can I dispute the fact that a BMW is far more expensive than a Yugo. The MTR2000 is a high-tier, heavy-duty, very reliable unit that can operate continuously. The TKR-850 is a low-tier station that is equivalent to the Motorola RKR-1225, and similar offerings from Icom, Vertex, and Ritron. If you want quality and durability, buy a high-tier station. If you feel that your needs do not warrant such an expenditure, stick with the more economical units. If you want a high-tier Kenwood station, look at the TKR-840 rather than the TKR-850. The TKR-840 is intended to drive a separate power amplifier, si nce it puts out 1 to 5 watts. The local public-safety agencies use a TKR-840 with a 100 watt TPL amplifier running at 75 watts. That combination is in the $3,500 class. The TKR-840 is the BMW of the Kenwood LMR product line. The TKR-850 is, well, not a BMW. Actually, the MTR-2000 is mid-to-low range. The high-tier for Motorola is still the Quantar. Yahoo! Groups Links Check out smokin' hot deals on laptops, desktops and more from Dell. _Shop Deals_ (http://pr.atwola.com/promoclk/10075x1213345834x1200842686/aol?redir=http://ad.doubleclick.net/clk;209513277;31396581;l) **Check out smokin’ hot deals on laptops, desktops and more from Dell. Shop Deals (http://pr.atwola.com/promoclk/10075x1213345834x1200842686/aol?redir=http://ad.doubleclick.net/clk;209513277;31396581;l)
Re: [Repeater-Builder] MTR 2000
The MTR 2000 is on Motorola's roadmap to get a P-25 upgrade option in the next couple of years. Bill - WA0CBW In a message dated 11/24/2008 10:26:53 A.M. Central Standard Time, [EMAIL PROTECTED] writes: Eric Lemmon wrote: John, I certainly can't dispute the fact that an MTR2000 repeater is far more expensive than a TKR-850 repeater, nor can I dispute the fact that a BMW is far more expensive than a Yugo. The MTR2000 is a high-tier, heavy-duty, very reliable unit that can operate continuously. The TKR-850 is a low-tier station that is equivalent to the Motorola RKR-1225, and similar offerings from Icom, Vertex, and Ritron. If you want quality and durability, buy a high-tier station. If you feel that your needs do not warrant such an expenditure, stick with the more economical units. If you want a high-tier Kenwood station, look at the TKR-840 rather than the TKR-850. The TKR-840 is intended to drive a separate power amplifier, since it puts out 1 to 5 watts. The local public-safety agencies use a TKR-840 with a 100 watt TPL amplifier running at 75 watts. That combination is in the $3,500 class. The TKR-840 is the BMW of the Kenwood LMR product line. The TKR-850 is, well, not a BMW. Actually, the MTR-2000 is mid-to-low range. The high-tier for Motorola is still the Quantar. Yahoo! Groups Links **Check out smokin’ hot deals on laptops, desktops and more from Dell. Shop Deals (http://pr.atwola.com/promoclk/10075x1213345834x1200842686/aol?redir=http://ad.doubleclick.net/clk;209513277;31396581;l)
Re: [Repeater-Builder] Need SWR meter recomendation
The latest models of the 259/269 have a recessed power switch to prevent it from being turned on accidentally. Bill - WA0CBW In a message dated 11/23/2008 12:53:06 A.M. Central Standard Time, [EMAIL PROTECTED] writes: Albert, I've had friends joke about MFJ standing for mighty fine junk, but I have nothing but good things to say about my MFJ 259 antenna analyzer. If you're building antennas, the MFJ 259 (HF/VHF) or 269 (HF/VHF/UHF) are really handy. If you're trying to find the resonant frequency or set up a gamma match, they'll save a ton of time compared to an SWR bridge/transmitter combination, and give you more information, such as resistance and reactance displayed separately on the LCD. It also serves as a counter and, in a pinch, as a (not-very-stable and somewhat microphonic) signal generator. But remember the limitations. You can't transmit through them, so they can't be used to monitor the behavior of an antenna under operating conditions. They can't be used to measure a transmitter's output power like most SWR bridges. They're also prone to error in any environment where strong external signals from nearby transmitters overwhelm the test signal internally generated by the analyzer, which results in a false reading of reflected power. I would recommend these little boxes to anyone, but do have one major complaint - the internal battery scheme. The thing takes 10 AA cells, they don't last long, and you have to remove several screws and the case to change them. You have to be really careful how you transport the 259, because the power button sticks out where any bump will turn it on, and run your batteries down. After having the power bumped on during storage and a resulting leak of the alkalines after they ran down, I cleaned it up (no permanent damage) and just don't put batteries in mine any more. I use it on the AC adapter, a cigarette lighter cord, or an external battery pack, all plugged into the 15V input. But I won't be without one! 73, Paul, AE4KR - Original Message - From: _Albert_ (mailto:[EMAIL PROTECTED]) To: [EMAIL PROTECTED] (mailto:Repeater-Builder@yahoogroups.com) Sent: Saturday, November 22, 2008 10:59 PM Subject: [Repeater-Builder] Need SWR meter recomendation Hey Everyone, I know there is a mix of Hams and commercial guys here so I want to ask all of you about SWR meters. I am a beginning ham and would like to build some VHF and UHF antennas. I am also on a budget. (Isn't everyone these days) I need a decent SWR meter for VHF and UHF use. I don't want a cheap piece of crap, and I can't afford top of the line either. What do you all think of the MFJ products? Other suggestions? Thanks **Check out smokin’ hot deals on laptops, desktops and more from Dell. Shop Deals (http://pr.atwola.com/promoclk/10075x1213345834x1200842686/aol?redir=http://ad.doubleclick.net/clk;209513277;31396581;l)
Re: [Repeater-Builder] MSR 2000 Extender card
Depending on how your card cage is mounted it is possible to pull the card cage forward exposing the backplane. Cards can then be installed directly on the backplane. Be sure the cards are oriented correctly when plugging them onto the backplane. This has the advantage of easy access to all the backplane connections when troubleshooting. Bill - WA0CBW **A Good Credit Score is 700 or Above. See yours in just 2 easy steps! (http://pr.atwola.com/promoclk/10075x1211625659x1200715650/aol?redir=http://www.freecreditreport.com/pm/default.aspx?sc=668072%26hmpgID=82%26bcd=em ailfooter)
Re: [Repeater-Builder] Re: CDM1550 Crossband using Motrola RICK?
(R)epeater (I)nterface (C)ommunications (K)it. It is a Motorola box that can be configured as either a Uni or Bi directional repeater (along with many other variations).The setup and configuration manual can be a little confusing but it works. BillB In a message dated 10/15/2008 1:18:41 P.M. Central Daylight Time, [EMAIL PROTECTED] writes: I’m embarrassed to ask but, what the heck, what is a “RICK”? John Transue -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of skipp025 Sent: Wednesday, October 15, 2008 2:01 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: CDM1550 Crossband using Motrola RICK? Afternoon, Yes, the standard rick most people use with Maxtrac Radios should work in the cross band bi-directional mode. If the radios you want to use will emulate (configure the same as) the Maxtrac 16 pin connector... you can easily make a bi-directional repeater cable (saving you from having to use a RICK Unit) by using some of the very common repeater cables seen/found sold on ebay. Remember there is obviously more than one Rick Model used in the various Maxtrac type repeaters so all examples are not the same. cheers, s. Morning, I was wanting to know if its possible to hook up a VHF and UHF radio to a Motorola RICK and use them for a cross band repeater? What would I have to do to accomplish this first off and can the radios be used normally when the rick is off on another channel? Some help? Thanks Peter Summerhawk __ NOD32 3192 (20080616) Information __ This message was checked by NOD32 antivirus system. _http://www.eset.com_ (http://www.eset.com/) **BUY Indiana Jones and the Kingdom of the Crystal Skull on DVD today! (http://pr.atwola.com/promoclk/10075x1209326865x1200539441/aol?redir=http://www.indianajones.com/site/index.html)
Re: [Repeater-Builder] Re: MICOR PL 74.4
Thanks Joe, I have already located a set. BillB In a message dated 9/10/2008 11:33:39 P.M. Central Daylight Time, [EMAIL PROTECTED] writes: Bill, Do you need the sender or the sponder, or both? I think there may be a set in our collection. Let me know what you need and I will take a look. Joe --- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote: Anyone have a Micor 74.4 PL reed laying around? BillB **Pt...Have you heard the news? There's a new fashion blog, plus the latest fall trends and hair styles at StyleList.com. (http://www.stylelist.com/trends?ncid=aolsty000514) Yahoo! Groups Links **Pt...Have you heard the news? There's a new fashion blog, plus the latest fall trends and hair styles at StyleList.com. (http://www.stylelist.com/trends?ncid=aolsty000514)
[Repeater-Builder] MICOR PL 74.4
Anyone have a Micor 74.4 PL reed laying around? BillB **Pt...Have you heard the news? There's a new fashion blog, plus the latest fall trends and hair styles at StyleList.com. (http://www.stylelist.com/trends?ncid=aolsty000514)
Re: [Repeater-Builder] newbie needs help
You will probably have to look for a used GR1225 repeater or perhaps a NOS from a dealer as they were canceled by Motorola several months ago along with the GR500 and RKR1225. BillB In a message dated 9/7/2008 11:47:28 P.M. Central Daylight Time, [EMAIL PROTECTED] writes: I have been tasked with researching what is needed for a non profit organization that is involved in Wilderness Search and Rescue within our County. Right now, we have a frequency of 155.1 but have not yet applied for a second freq. It will have to be in the Public Safety Range for VHF. We are looking to outfit a Mobile Command unit and need a 50 watt repeater that will work inside a mobile command without having to run a huge generator just to run the repeater. Ideally, we would get a Duplexer as we don't usually have room to place 2 antennas. We are kind of looking at the Motorola GR1225 repeater but would like to get opinions on this radio and any others that you can suggest. Is a 16 channel unit overkill for what we need? Thanks Ray Yahoo! Groups Links **Pt...Have you heard the news? There's a new fashion blog, plus the latest fall trends and hair styles at StyleList.com. (http://www.stylelist.com/trends?ncid=aolsty000514)
Re: [Repeater-Builder] Rohn contact info needed re: ssv base
Many Cities, Counties, etc. require the foundation to be designed for the soil found at the site of the tower rather than for standard soil. This would require soil samples and a foundation designed by a registered P.E. They may also require that the design be signed by a P.E registered in the same state. Bill - WA0CBW In a message dated 8/27/2008 9:47:28 A.M. Central Daylight Time, [EMAIL PROTECTED] writes: Zoning requires a letter from Rohn engineering regarding the base for an 80 foot SSV tower. I gave them the engineering drawings of the tower and base section and foundation for all heights of SSV towers, They (zoning) in turn called Rohn (I am getting this third hand) Were told by someone that the tower needed to be in the ground 16 feet or something like that. Even after showing them the drawings again that it only requires a 8x8x4 concrete pad and short base section they are still insisting they need a letter from Rohn. You would think they could understand the drawings but I guess not. I am guessing they showed the drawings to some building inspector and he told them how far the bottom 80 feet had to be in the ground. When I get the letter my customer gets the variance. Anyone have an e-mail contact at Rohn or name and phone number? Thanks tom P.S. I tried to get on Rohn's web site and was alerted that there is possible Malicious software there. Yahoo! Groups Links **It's only a deal if it's where you want to go. Find your travel deal here. (http://information.travel.aol.com/deals?ncid=aoltrv000547)
Re: [Repeater-Builder] Re: UHF MICOR Unified Chassis
Check the repeater-builder site for a mod to the station control module to make it DISABLE the transmitter and add a status LED as well. Bill - WA0CBW In a message dated 8/5/2008 10:23:34 A.M. Central Daylight Time, [EMAIL PROTECTED] writes: n9wys wrote: Well, Joe - I got it to work! What I ended up doing was chasing the audio path from the goes-inna through the backplane. I found that on the Squelch Gate card, it was not being passed, even though the jumper was in place. I added a hard-wire jumper to the backplane between Pins 11 and 24, and VOILA! The next thing I need to do is figure out why I cannot defeat PL operation... when I switch the Station Control to PL DISABLE, the station still transmits. In fact, it transmits even when the LINE DISABLE is switched on, too. More jumpers, I fear. It's not supposed to. It doesn't say 'Transmit Disable'. Line Disable will disable any DC or Tone remote. PL just opens the local speaker to carrier squelch. Yahoo! Groups Links **Looking for a car that's sporty, fun and fits in your budget? Read reviews on AOL Autos. (http://autos.aol.com/cars-BMW-128-2008/expert-review?ncid=aolaut000517 )
Re: [Repeater-Builder] New Repeater Desense Problems
Additional accuracy can be obtained by providing a 50 ohm load for the generator. This can be accomplished by connecting the center of the ISO T to the center of the unmodified T to form an H configuration. Then connect the generator to one end of the unmodified T and a 50 ohm load to the other end of the unmodified T. This allows the generator to see a 50 ohm load. billb Yahoo! Groups Links **Get the scoop on last night's hottest shows and the live music scene in your area - Check out TourTracker.com! (www.tourtracker.com?NCID=aolmus0005000112)
[Repeater-Builder] Dayton Tickets
I finally received my Dayton tickets this weekend. Whew, I was beginning to wonder! Bill - WA0CBW **Need a new ride? Check out the largest site for U.S. used car listings at AOL Autos. (http://autos.aol.com/used?NCID=aolcmp0030002851)
Re: [Repeater-Builder] Dayton Tickets and Fleamarket
I haven't received my Dayton Tickets yet. Bill - WA0CBW **Need a new ride? Check out the largest site for U.S. used car listings at AOL Autos. (http://autos.aol.com/used?NCID=aolcmp0030002851)
Re: [Repeater-Builder] RE: Re: Static on grounded feed line system.
The Motorola R56 manual is available as a 3-ring binder or a CD. The 3-ring binder is part number 68P81089E50-B and the CD is part number 9880384V83-O. Last time I looked they were about $100.00 from parts. Your local Motorola service shop should have a copy. Bill - WA0CBW **Planning your summer road trip? Check out AOL Travel Guides. (http://travel.aol.com/travel-guide/united-states?ncid=aoltrv000316)
Re: [Repeater-Builder] Static on grounded feed line system.
According to Motorola R-56 standards a 200 foot tower requires the coax to be grounded at the top and the bottom using a coax ground kit. If the run from the tower to the building entrance is greater than 20 feet the coax should be grounded at the entrance to the building as well. The coax inside the building should be fitted with surge suppresors (polyphasers or equivalent) within 2 feet of the entrance port. The polyphasers and all equipment grounds should be connected to a single point ground at the entrance panel. If there is a halo ground it should connect to the single point ground bus. It is recommended today that the halo ground NOT be a complete loop but be open for about 1 foot at the opposite end of the halo loop. Non equipment items (door frames, cable tray, cabinets, metal louvers, doors, etc) should be connected to the halo or the single point ground bus which ever is the shortest run. Motorola's R-56 manual is an excellent standard and tutorial on the professional way to properly ground and bond a communications site. I worked for Motorola for 18 years installing communications buildings and equipment. If you have any questions about grounding I will try to help. Bill - WA0CBW **Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15ncid=aolhom000301)
