Re: [Repeater-Builder] Re: GMRS License Help
Hi If you go to mygmrs.com they have a lot of detail and information about how to respond to the latest government buy out by business The FCC is going to make GMRS go away unless we post responses to there proposals Chris Quirk; W6CJQ WQHA994 District Emergency Coordinator East Bay Section - District 3 (Contra Costa County) ARRL, The National Association for Amateur Radio™ Home: 925-828-1003 Mobile: 925-202-1198 Fax 925-828-1027 w6...@arrl.net --- On Wed, 7/28/10, Mike Morris wrote: From: Mike Morris Subject: Re: [Repeater-Builder] Re: GMRS License Help To: Repeater-Builder@yahoogroups.com Date: Wednesday, July 28, 2010, 2:38 PM Absolutely true. And that's only the start of it. Look up NPRM 10-119 in Google. Mike At 12:54 PM 07/28/10, you wrote: >we are hearing that the fcc is going to limit output power to 2 watts >in the gmrs service >that would preclude all repeaters and implies handheld use only > > >--- In Repeater-Builder@yahoogroups.com, "Andy" wrote: > > > > I just applied for my GMRS license yesturday evening. I got a > confirmation email saying that I did pay my 85.00 bucks. How do I > know what my call sign is and all my license information. Will I > get another email when all the data is processed by the FCC and > everything is confirmed. Will they mail my license to me in the mail?? > > Yahoo! Groups Links
RE: [Repeater-Builder] Frequency Listing Sites
Also have several UHF frequencies, they use these in SF. Also have the Golden Gate dispatcher The list below has the state wide take a look for Golden Gate 460.02500 RM 127.3 PL Lima Ch 3 Clemars FM Interop 460.25000 KMG999 RM 127.3 PL Lima Ch 4 Coastal Division FM Law Talk 460.37500 KYJ339 RM 127.3 PL Lima Ch 5 Border/Inland Division FM Law Talk 460.45000 KYK292 RM 127.3 PL Lima Ch 6 Valley/Central Division FM Law Talk 453.2 KYK296 RM 127.3 PL Lima Ch 7 State Capitol Police FM Law Talk 453.82500 KYJ331 RM 127.3 PL Lima Ch 8 Golden Gate Division FM Law Talk 453.85000 KYJ331 RM 127.3 PL Lima Ch 9 Golden Gate Division FM Law Talk 460.08750 KYK296 M 127.3 PL Lima Ch 10 Tactical 1 FM Law Tac 460.21250 KYK296 M 127.3 PL Lima Ch 11 Tactical 2 FM Law Tac 460.33750 KYK296 M 127.3 PL Lima Ch 12 Tactical 3 FM Law Tac 465.08750 KYK296 M 127.3 PL Lima Ch 13 Tactical 4 FM Law Tac 465.21250 KYK296 M 127.3 PL Lima Ch 14 Tactical 5 FM Law Tac 465.33750 KYK296 M 127.3 PL Lima Ch 15 Tactical 6 Chris Quirk; W6CJQ WQHA994 District Emergency Coordinator East Bay Section - District 3 (Contra Costa County) ARRL, The National Association for Amateur Radio™ Home: 925-828-1003 Mobile: 925-202-1198 Fax 925-828-1027 w6...@arrl.net --- On Fri, 4/23/10, Eric Lemmon wrote: From: Eric Lemmon Subject: RE: [Repeater-Builder] Frequency Listing Sites To: Repeater-Builder@yahoogroups.com Date: Friday, April 23, 2010, 9:34 AM John, Yes, the CHP uses several VHF frequencies for "extender" usage. The officer carries a VHF radio on his/her belt, and it communicates with the car radio for relaying signals to/from the base station. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of La Rue Communications Sent: Friday, April 23, 2010 9:22 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Frequency Listing Sites Thanks Ian and Tim - Anyone know if CHP has a VHF or UHF Frequency, or are they entirely Lowband? John Hymes La Rue Communications 10 S. Aurora Street Stockton, CA 95202 Yahoo! Groups Links
Re: [Repeater-Builder] Are people on ebay nuts?
Ebay is like any other retail buying process, some people pay to much some get
great deals.
There is also Cragslist, QRZ, the ARRL ads Radioreference
Uninformed buyers and sellers get what they deserve. I use Ebay a lot and
bcause I am careful and research things I do not get stuck
I also sell at market or below market. I have a UHF 5 watt with duplexor
repeater for $99 currenlty listed. It works if someone puts another $100 in it
for Xtals fro GMRS or amatuer and alignment it is a great little low power unit.
Not sure why these rants get started but if you do not like what you see just
click past it
--- On Sat, 3/27/10, Richard W. Solomon wrote:
From: Richard W. Solomon
Subject: Re: [Repeater-Builder] Are people on ebay nuts?
To: Repeater-Builder@yahoogroups.com
Date: Saturday, March 27, 2010, 12:24 PM
#yiv90650848 {font-family:Geneva, Arial, Helvetica,
sans-serif;font-size:10pt;font-family:arial,
sans-serif;background-color:#ff;color:black;}#yiv90650848 p{margin:0px;}
Just remember Judge Roy Bean ...
There is no law West of the Pecos nor on e-Bay.
73, Dick, W1KSZ
-Original Message-
From: Wayne Leake
Sent: Mar 27, 2010 11:06 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Are people on ebay nuts?
I see assorted items for various prices on Ebay. Some worthwhile, some not,
like the 800 Mhz Exec II that the seller says jhe was told can be conveted to
400 Mhz. 900 Maybe, but not 400 without swapping parts.
Sellers giving part numbers as model numbers, like a Delta S (I think it is an
S) and the picure that would show the actual model number/combo, is glared out
so one cannot see. Some sellers are ignorant, and others simply imply with no
guarantee...
Maybe I should strip my high band Mastr II's and sell parts, most are working
on original frequencies, and only keep the UHF stufff for my repeater.
I even have, somewhere, a working Exec II 50 watt or so PA, tested using an HT
as the driver.
I'll go one better, we have a high band Motorola base, tubes, that someone
might like, but shipping would be a killer. Working unknown. Were also, as I
recall, a number of prog line mobiles, some may still work.
Shipping is often the killer on some items.
And the buyer should double check with the seller for information to clear up
what the item may actually be.
Not a motorola person, so not sure just what the 300 really is...
Wayne WA2YNE
On Sat, Mar 27, 2010 at 9:59 AM, Eric Lemmon wrote:
Not really. The vendor of the GR300 repeater is as sane as you and me, and
he is really smart. He knows that some nut out in la-la land will gladly
pay that amount and more for the clunker. Notice that programming and
shipping are not included in the Buy It Now price. I have no doubt that if
the seller included the phrase "original and very rare" in the description,
he could ask and get $2,000 for it!
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of kc7stw
Sent: Friday, March 26, 2010 11:43 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Are people on ebay nuts?
This has to be a joke right?
Look at item number, 130377678510
$1,320 are they for real? I really love the missing covers, the bent case
and the rust. Adds real class.
Re: [Repeater-Builder] Interference
Interesting problem, can you describe the interference?? --- On Thu, 3/4/10, wd8chl wrote: From: wd8chl Subject: Re: [Repeater-Builder] Interference To: Repeater-Builder@yahoogroups.com Date: Thursday, March 4, 2010, 6:57 AM On 3/4/2010 9:40 AM, Leroy A. M. Baptiste wrote: > The only other station in the building is on > 107.500MHz > It could also be from an AM station on 600 KHZ +/-10 KHz. > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:repeater-buil...@yahoogroups.com] On > Behalf Of wd8chl > Sent: Thursday, March 04, 2010 10:21 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Interference > > > > On 3/4/2010 8:56 AM, Leroy A. M. Baptiste wrote: >> Hello all, I am having some interference > problems, >> it is coming from an FM transmitter on > 94.500MHz, >> and getting into the Amateur Radio repeater's >> receiver on 146.1600MHz. It is not there all the >> time, but when the repeater is keyed up, you can >> hear it getting in. The 2 Meter repeater is fed >> with heliax cable from the duplexer to the >> antenna, the transmission line on the FM station >> is ordinary coaxial cable, the power output is >> about 300 Watts, any ideas? >> >> >> >> Leroy. J39AI >> >> > > Is there another FM station on either 95.1 or > 93.9? Guess what-600 KHz! > Natural intermod source! Yahoo! Groups Links
Re: [Repeater-Builder] dual band convertacom
On the comment below all I can mention is from my experience which may or may not be valid in this case. When running amplifiers through diplexors as suggested I have damaged the out put transistors on both units, no I am not sure exactly what did it but as both amplifiers failed my guess is as one came up to full power and the other went non linear something happened and the diplexor failed to isolate as desired and expected. If anyone can sort out what happened let me know --- On Wed, 2/24/10, Kris Kirby wrote: From: Kris Kirby Subject: Re: [Repeater-Builder] dual band convertacom To: Repeater-Builder@yahoogroups.com Date: Wednesday, February 24, 2010, 11:01 AM On Wed, 24 Feb 2010, hitekgearhead wrote: > What I would like to do is parallel these two amps with some kind of > switching/duplexer setup so that I could easily switch from VHF to > UHF. > > My initial idea was to run an antenna switch from the convertacom to > the amps so I can manually select which one the signal goes to. Then > on the output side of the amps I thought about using an antenna > duplexer on the output of the amps to feed the antenna. I was also > thinking of running a switch to alternately select which amp was > receiving DC power, but I don't know if that would be necessary. > (Could I leave both amps powered on in this situation?) > > So, does this sound about right or am I going off the deep end? Buy two duplexers (diplexers) from some ham source, put one between the MTVA and the amps, and the other between the amps and the antenna. No switching needed. If one really wanted to get wonky, you'd put another MTVA in the car and use a linear dual-band HT amp, but you'd have to look at the third-order intercept points on a spectrum analyzer to make sure the amplifier doesn't create mixing products, and alter the drive level of the two HTs to make sure the amp doesn't go non-linear when trying to amplify 145MHz and 440MHz at the same time. -- Kris Kirby, KE4AHR Disinformation Analyst Yahoo! Groups Links
Re: [Repeater-Builder] dual band convertacom
2 coaxial switches will work, and you could leave power on. Given that I know what I am capable of and this type of system would lead to muliple failures by me as I failed to remember to switch things. If it was me I would just move the coax connectors as I swapped radios. I have done something like this in the past and got irritated and tossed the whole thing is favor of a wide band type of amp, which also has its issues of tuning and retuning --- On Wed, 2/24/10, Lee Pennington wrote: From: Lee Pennington Subject: Re: [Repeater-Builder] dual band convertacom To: Repeater-Builder@yahoogroups.com Date: Wednesday, February 24, 2010, 9:07 AM Not why but WHY !! On Wed, Feb 24, 2010 at 11:56 AM, hitekgearhead wrote: I know I am going to get the singular answer of "WHY" but I really would like some technical input on this. In my car I have an old Genesis series convertacom connected to a dual band Comet antenna. I often will swap my VHF and UHF HT back and forth and utilize the dual band capability of my antenna. It works pretty well. What I would like to get some input on however, is how to run some power with this setup. Of course the easiest would be to get a amateur dual band amplifier, but I already have a VHF and a UHF (N1275A and N1274A) amplifier. What I would like to do is parallel these two amps with some kind of switching/duplexer setup so that I could easily switch from VHF to UHF. My initial idea was to run an antenna switch from the convertacom to the amps so I can manually select which one the signal goes to. Then on the output side of the amps I thought about using an antenna duplexer on the output of the amps to feed the antenna. I was also thinking of running a switch to alternately select which amp was receiving DC power, but I don't know if that would be necessary. (Could I leave both amps powered on in this situation?) So, does this sound about right or am I going off the deep end? Thanks Albert -- "Always drink upstream from the herd."
Re: [Repeater-Builder] dispatch centers run through the internet
So you would route and forward 911 calls to someones house? Are we talking about controling the radio and the console or just the console ? Does the radio interface to the console ? ( BTW I assume this is an onscreen console or virtual console not a real nuts and bolts thing which makes it a little more interesting) How far is the dispatch center from the offsite employee? What is your strategy for fall over when the net goes down ? ROIP is doable, but to have it bullet proof and secure it is not cheap and the words T1 come to mind Another group I work with who knows more I will let you know who they are outside of the list. The other way is to use a remote application like BOMGAR and go in and control the virtual dispatch console, you then use a radio at the employees house to dispatch calls and take care of radio traffic (repeaters enable this well). The 911 calls are forewarded from the real or virtual phone switch so they can still be recorded and logged. They forward to a land line rather than a cell phone. Many years ago we used to port the 911 calls into the radio system and if the dispatcher did not pick up for some reason the local fire house was aware of the call and would start roilling. .The local fire house could patch into the phone via a hard phone line and talk to the caller by conferecing into the call. All lines were secure within the phone network so an outsider could not intercept the phone call once the coneection was made.The incident report would contain the information required so nothing was lost, this goes back a long ways though and I have no idea what the legal in and out of this would be from a security and confidentiality issue. Worth while project just make sure the ability to make this work at muliple locations is possible. Would not want to favor one employee over another. --- On Mon, 1/4/10, Jed Barton wrote: From: Jed Barton Subject: [Repeater-Builder] dispatch centers run through the internet To: repeater-builder@yahoogroups.com Date: Monday, January 4, 2010, 1:03 PM Hey guys, I am working on a project and am wondering if anyone has done this. Here's the proposal, to setup a dispatch center for an FD, where the dispatchers can sit at home and work the entire thing. This is not a very busy department, that's why they thought it would be good to do it. I've done a lot of research, and it can certainly be done. This obviously brings up a lot of debate for a number of reasons. In looking at it though, the relyability of the net is very good compared to a verizon phone line. Curious if anyone has done something like this before. For the phone system, we'reusing a virtual phone system that has proven relyability. Thanks, Jed Yahoo! Groups Links
Re: [Repeater-Builder] Price Check on aisle five.....
Not sure what you are asking: The cables specs are good for VHF UHF. .50 a foot is a good price. Handles more than legal amateur power. connectors are available on several sites. I would buy it yes --- On Tue, 12/8/09, hitekgearhead wrote: From: hitekgearhead Subject: [Repeater-Builder] Price Check on aisle five. To: Repeater-Builder@yahoogroups.com Date: Tuesday, December 8, 2009, 11:38 AM Hey guys, I have the opportunity to purchase some surplus Andrew heliax. The model is EFX2RN-50. It is 3/8" At $0.50/foot, is this a good deal? I don't think connectors are installed. I am thinking of using it for amateur use on the VHF & UHF bands at home. What do you think? -Albert Yahoo! Groups Links
Re: [Repeater-Builder] Batteries for Backup- Methods
Hi: I use a liquid I buy at an automotive repair shop that coats the battery connections. Cheap works well, just remember to use gloves when you apply it as it does not come off your skin easily. --- On Tue, 12/1/09, Paul Plack wrote: From: Paul Plack Subject: Re: [Repeater-Builder] Batteries for Backup- Methods To: Repeater-Builder@yahoogroups.com Date: Tuesday, December 1, 2009, 12:42 PM Bingo. My solar powered repeater developed charging issues, and when I went to check, it was due to corrosion on the homebrew charge controller's PC board. 73, Paul, AE4KR - Original Message - From: Mark To: Repeater-Builder@yahoogroups.com Sent: Tuesday, December 01, 2009 11:13 AM Subject: RE: [Repeater-Builder] Batteries for Backup- Methods Tom and all, I think I’d be more worried about corrosion issues associated with H2S gas mixing with water vapor and creating sulfuric acid (H2SO4) Mark – N9WYS From: Repeater-Builder@ yahoogroups. com On Behalf Of Chris Quirk Well boats usually do not blow up or catch fire from hydorgen leaking from batteries. It is usually from gasoline vapors or leaking propane. The plastic battery box is a corrosion / spill containment issue. . You add to this that hydrogen rises very quickly as it is much lighter than air and you ask the question how much gas would stay in an enclosed area ? My guess is little to none. --- On Mon, 11/30/09, TGundo 2003 wrote:30, 2009, 3:35 PM Thanks to everyone for the feedback so far!
Re: [Repeater-Builder] Batteries for Backup- Methods
Well boats usually do not blow up or catch fire from hydorgen leaking from batteries. It is usually from gasoline vapors or leaking propane. The plastic battery box is a corrosion / spill containment issue. My Jaguar XJ8 L has the battery in the well sealed trunk of the vehicle, I have also owned several cars that the batteries were under the back seat. So Hydrogen gas and venting is a real issue but statically incidents are pretty low from what I can tell Like I said earlier there are repeaters in the same block house that mine is in and they place the batteries in the bottom of the cabinet with no real venting taking place, does not seem to be an issues and as most of the chargers are slow charge with trickle so not a lot of gas released anyway. You add to this that hydrogen rises very quickly as it is much lighter than air and you ask the question how much gas would stay in an enclosed area ? My guess is little to none. --- On Mon, 11/30/09, TGundo 2003 wrote: From: TGundo 2003 Subject: Re: [Repeater-Builder] Batteries for Backup- Methods To: Repeater-Builder@yahoogroups.com Date: Monday, November 30, 2009, 3:35 PM Thanks to everyone for the feedback so far! So here is what is bothering me this afternoon. Maybe someone here can shed some light on this for me. The battery I am thinking about using was one I bought a while ago for my boat, but I didn't use it because it was too big for the battery box in the boat (don't ask). I kept it knowing full well I had other uses for it. Thinking about this some more, by law any wet cell battery on a boat must be contained in a battery box. Thinking more about this, I realize that the standard plastic battery box is not really vented, nor completely sealed. In the case of my boat (24' pontoon)has two such batteries, one under the seat in the rear for the motor and the other under the seat in the front for the trolling motor. The compartments under the seats are enclosures in and of themselves. The rear one is charging off the engine during run time. On an afternoon cruise it could run for several hours charging the battery the whole time. So the wet cell battery, in the box by law, is charging in a box with little ventalation. Are boat owners everywhere sitting on ticking hydrogen bombs? Tom W9SRV
Re: [Repeater-Builder] Batteries for Backup- Methods
Hi I use a couple of fans that run costatly when the utility power is available, the air sweep is hgh enough to prevent any Hydrogen build up. One fan alone is enough in case one fails. Also have several other repeaters in with me that have deep cycle batteries in the cabinet with no venting. Not been a problem, well so far any way. --- On Sun, 11/29/09, tgundo2003 wrote: From: tgundo2003 Subject: [Repeater-Builder] Batteries for Backup- Methods To: Repeater-Builder@yahoogroups.com Date: Sunday, November 29, 2009, 9:42 PM I am going to be installing a repeater that has capability for battery backup soon. I have room in the bottom of the cabinet for a couple of batteries. I know If I want to have them in the cabinet then i need to look at AGM type so I don't have to worry about venting & spillage. I can fit 2 120AH AGM batteries in the bottom of the rack, so that's my plan for permanent installation. However, there are "insufficent funds" available to purchase those right now. I do however have a Marine Deep Cycle 120AH battery at my disposal I could use for the time being. It would give me some run time in a power failure. I know that it could not be in the radio cabinet due to the hydrogen venting. My question for the group: Is there a way I can install this for the time being safely? The repeater is in the base of a large water tower that is far from airtight but still enclosed. How much venting would be required? Do I need to vent it outdoors for one battery? Is this a bad idea & I should just wait until I can get the AGM batteries I need? Thank you for any replies. I know we have covered some of this before but searching the archives failed to yield the answer I'm looking for. Tom W9SRV Yahoo! Groups Links
RE: [Repeater-Builder] $2000 Motrac era repeater!
Just surprised it did not end up on Ebay --- On Wed, 11/25/09, JOHN MACKEY wrote: From: JOHN MACKEY Subject: RE: [Repeater-Builder] $2000 Motrac era repeater! To: Repeater-Builder@yahoogroups.com Date: Wednesday, November 25, 2009, 12:50 PM I hope your thanksgiving is also well! -- Original Message -- Received: Wed, 25 Nov 2009 06:49:22 AM PST From: To: Subject: RE: [Repeater-Builder] $2000 Motrac era repeater! > Hi John, > > > > Now that is funny, I got quite a chuckle out of that post. > > > > I hope you and your family have a happy Thanksgiving. Yahoo! Groups Links
Re: [Repeater-Builder] setting up a repeater for dispatch
Not sure why people think voice over IP is cheap, it is less costly but cheap ? 100% monitoring of line quality, multiple T 1s with different carriers and still support a micro wave link to back all this up. When the T1 (s)goes down and Micro is up we lose significant capacity on the system however it is meant to be a partial not a full back up. If you are in an area where one carrier and only one carrier is brining it into you building you have a single point of entry with no back up if some tech cuts the copper in your area you are in real trouble as they may not know who did it for hours. We lost all communications in the San Jose area earlier this year as a result of a cable being cut by an angry employee. no 911 service either. --- On Tue, 11/24/09, Nate Duehr wrote: From: Nate Duehr Subject: Re: [Repeater-Builder] setting up a repeater for dispatch To: Repeater-Builder@yahoogroups.com Date: Tuesday, November 24, 2009, 1:43 PM Time for my favorite rant -- pardon me for a moment: The more important point for putting Public Safety on IP networks (of any sort) is that the IP link has MONITORING built in. Most (even so-called "Public Safety ready") IP linking systems DO NOT have ANY way to notify the dispatcher that their transmissions are NOT going out over the air, or that the link coming in from the field radio units is down. VoIP/RoIP is "cheap" but you get what you pay for. Engineering it properly and MONITORING the links is essential, since lives are on the line. I helped some folks test the very early EF Johnson Ethernet ports on the back of their repeaters, and custom "dispatch" software that tied a headset on the sound card on a PC to the repeater(s). The system used Multicast IP (mistake number one), UDP (maybe mistake number two), and when I said, "Unplug the Ethernet jack from the repeater" while the dispatch console was "transmitting"... there was ZERO alarm indication ANYWHERE to tell either the dispatcher, the officers in the field, or the technicians -- THAT THE SYSTEM WAS DOWN. This problem is by no means limited to EFJ, it's just the one I saw in person on a test bench with my own two eyes. RoIP engineers need to pull their heads out of their you-know-what's, and start THINKING again. RF links had a continuous tone on them in most systems for a REASON -- the link was DESIGNED to be continuously monitored by a dry-alarm contact at both ends. Whether or not the system engineer actually took the time/money/effort to USE those dry-contacts and alarms in their system plan, is a whole different story. But most RoIP implementations DON'T EVEN HAVE THEM. Avoid any that don't. Engineering done properly will pay off later. Just because government agencies can't be sued for liability (who's bright idea was THAT?), doesn't mean the system engineer should do anything less than the best job possible for the officers in the field attempting to contact someone for help. RoIP/VoIP is "gee whiz" technology when it provides a link that would otherwise be cost-prohibitive or impossible due to terrain. It's "oh shit!" technology when it fails and no one in the dispatch center knows it's down. "Hero to zero" in one second flat. BUILD NETWORK MONITORING INTO YOUR VOIP/ROIP APPLICATIONS PLEASE. Done with my rant... if it doesn't apply to the technology you've chosen, ignore. If there are those reading along who just had an "oh shit!" moment thinking about their VoIP/RoIP network that's already deployed... go write up that budget request for monitoring and FIX IT... now. Before your bouncing IP link someday kills someone. -- Nate Duehr, WY0X n...@natetech.com
Re: [Repeater-Builder] Code 3 - RFI
Ran into the same problem with Star Lantern supervisor lights that mount inside the car. Never got it solved, on low band, radio unusable, VHF UHF you could hear it but dispatch was louder. --- On Mon, 11/16/09, Dan Blasberg wrote: From: Dan Blasberg Subject: Re: [Repeater-Builder] Code 3 - RFI To: Repeater-Builder@yahoogroups.com Date: Monday, November 16, 2009, 3:34 PM What model where the mirror lights? If they were an older model that has an internal ballast, upgrading them to non-ballast versions clears up the RFI. Dan KA8YPY On Nov 16, 2009, at 3:03 PM, skipp025 wrote: > Re: Code 3 - RFI > > Today's amusing Code 3 RFI story comes to you courtesy > of modern LED Code 3 lighting hardware companies. > > A State Police Car arrives with missing receive audio > radio complaints. In the interest of brevity... via a lot > of searching to find the New Generation LED (Code-3) > lighting generates more than enough RFI to pretty much > disable the low band receiver. Not from the trunk mounted > controller mind you but the unwanted RF energy radiates from > the actual LED fixtures installed in each rear-view mirror. > > They're going back to "analog" (light bulbs) lighting at > the cost of global warming. I might report them to Al Gore... > but probably not anytime soon. > > :-) > > cheers, > s. > > > > > > > > Yahoo! Groups Links > > > Yahoo! Groups Links
RE: [Repeater-Builder] Question on portable repeaters
How big is the SUV? --- On Wed, 10/7/09, Eric Lemmon wrote: From: Eric Lemmon Subject: RE: [Repeater-Builder] Question on portable repeaters To: Repeater-Builder@yahoogroups.com Date: Wednesday, October 7, 2009, 6:42 PM Peter, The only viable solution for a portable repeater on 2m is to use two widely-spaced frequencies, low power, and a compact base-station duplexer. Here in Central and Southern California, TASMA has wisely set aside two frequencies (144.930 input and 147.585 output) exclusively for temporary portable repeaters. The 2.655 MHz separation means that a small duplexer such as the Celwave 5085-1 can be used at low power, say 10 watts. I have just such a repeater in the final stages of construction, using a Motorola R1225 VHF duplex radio running about 8 watts- more than enough for emergency communications. The complete repeater is in a Pelican-style case that is about one cubic foot and weighs about 15 pounds. Separate antennas is really not an option here. Even with just 10 watts of power, the horizontal separation needed to avoid desense is over 9,500 feet horizontally or 150 feet vertically. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Peter Dakota Summerhawk Sent: Wednesday, October 07, 2009 4:15 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Question on portable repeaters Morning, We are looking at building a portable repeater for special even use. This will be mobile mounted and 2M. My questions is this: If we are using two radios (one for TX one for RX) then what does the antenna separation have to be for all of this to work? Planning on mounting this in a SUV so roof space can be adjusted if need be. Thanks Peter Dakota Summerhawk Laramie County ARES Yahoo! Groups Links
Re: [Repeater-Builder] Question on portable repeaters
Because the spacing between antennas is minimal at 440 and 900 megs and you can buy a duplexor for roughly the same cost as a good mobile antenna. If you want this to be an easy set up 44O is the way to go. Might also want to look for some used 2 meter stuff with duplexors ready to go. The seperate antenna and radios add to the work but can be done. for special events the less that can go wrong the better. --- On Wed, 10/7/09, JOHN MACKEY wrote: From: JOHN MACKEY Subject: Re: [Repeater-Builder] Question on portable repeaters To: Repeater-Builder@yahoogroups.com Date: Wednesday, October 7, 2009, 6:17 PM Don't even try doing a portable repeater on 2 meters. Do it on 440 MHz or 900 Mhz. -- Original Message -- Received: Wed, 07 Oct 2009 04:15:29 PM PDT From: "Peter Dakota Summerhawk" To: Subject: [Repeater-Builder] Question on portable repeaters > Morning, > We are looking at building a portable repeater for special even use. This > will be mobile mounted and 2M. My questions is this: If we are using two > radios (one for TX one for RX) then what does the antenna separation have to > be for all of this to work? Planning on mounting this in a SUV so roof space > can be adjusted if need be. > > Thanks > > > Peter Dakota Summerhawk > Laramie County ARES > > > Yahoo! Groups Links __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
Re: [Repeater-Builder] Programming For Vertex VXR-1000
Hi My VX 1000 U works on PSB and commercial frequency only nothing in the ham bands works on mine and yes I have tried a lot of different things. That being said I have the program and cables for it, if you want I will give it a try at no charge, if it works I will be amazed and you will be very happy. --- On Fri, 10/2/09, wb0vhb wrote: From: wb0vhb Subject: [Repeater-Builder] Programming For Vertex VXR-1000 To: Repeater-Builder@yahoogroups.com Date: Friday, October 2, 2009, 5:56 PM I have the UHF version and would like to know if it will program below 450 MHz? If so, I would be happy to pay someone to program it for me. Yahoo! Groups Links __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
Re: [Repeater-Builder] Re: ARRL Approves Study Committee to Research & Develop Plan for Narrowband Channel Spacing
I think this is kind of where you live thing if you lived in the Northern Californian Bay Area you would see a need for more pairs and narrow banding. We have repeaters to close together in frequency so that they become unusable at times. Area is also going with digital comms and there are no pairs left in VHF to do this with. To make matters a little worse our 70 CM repeaters were shut down due to alleged interefence wit the primary user of the spectrum Public service users waste spectrum always have always will, we use VHF for most public saftey and it works well in this county. They are of course talking about a multi million dollar upgrade to APCO 25 and the interoperabilty need. Some simple and cost effective solutions out there but no it will not go that way. As fire and police use VHF a simple radio re-reprogram would fix it with some mutual aid channels in use, but not likely to go that way --- On Fri, 10/2/09, skipp025 wrote: From: skipp025 Subject: [Repeater-Builder] Re: ARRL Approves Study Committee to Research & Develop Plan for Narrowband Channel Spacing To: Repeater-Builder@yahoogroups.com Date: Friday, October 2, 2009, 9:01 AM I would say BS to the "need more pairs in the commercial and public safety world". In the commercial world, the available spectrum is not smartly used and there is much gross waste of resources. Public Safety "Empire Builders" scream for independent radio systems, then scream for interoperability using different formats/modes. We see a different type of wasted spectrum and materials in a lot of the Public Safety World. It's all pretty well messed up... s. > "Chuck Kelsey" wrote: > I don't see that there is a true NEED for more > pairs in amateur service. > There IS a need in the commercial/public safety > world. Yahoo! Groups Links
