[Repeater-Builder] WTB: GE MII Cont. Duty Heatsinks Dead or Alive
All, I am in need of some MII constant duty heatsinks. VHF 3 transistor preferred, but not a requirement. They need not be in working order. All I am looking for is the 1/2 thick plate, tinwork, and heatsink fins. Please respond privately with your asking price. Thanks, Scott Scott Zimmerman Amateur Radio Call N3XCC 474 Barnett Road Boswell, PA 15531
[Repeater-Builder] W1GAN and square duplexers
Hi Most of you who are into duplexers will know W1GAN's old QST-article A Homemade Duplexer for 2-Meter Repeaters. His design uses 4 copper tubes, but today many duplexer manufacturers use square aluminium profile as duplexer bodies, i.e. Sinclair but others as well. Now I wondered if W1GAN's design could be used for building such an aluminium square tube duplexer as well and if it would work equally well. Does anybody know? Instead of the 4 round tube, would a 4 square tube be used, or does the circumference matter? Kind regards Martin
[Repeater-Builder] Decibel Antenna Harness Info
For those of you that would rebuild a bad or questionable DB 420 by replacing the wiring harness (Andrew/Decibel Products #12074-420B), Andrew DB made a business decision to no longer sell the harness alone. A copy of the wiring diagram for the DB420 has been uploaded to the files section. The cable called vb83 in the chart is 35 ohm cable Anyone know of a company building them ? CJD
[Repeater-Builder] Re: Remote Receiver
We've had real good luck with using Icom ICF121S (VHF) and Icom ICF221S (UHF) transceivers for this type of application. For us, the trade off was folks capable of repairing, maintaining, and modifying older gear vs. folks who could help us get money for newer gear. We bought a bunch of radios all at once from a local Icom reseller, along with 2 programming cables, and one copy of the software. We didn't buy the required OPC-617 cables that easily allow you access to COR PTT AUDIO, etc. but rather went to http://presonmoore.com/repeater.html for a good replacement at half the cost. The ICOM radios are quite flexible, and we also liked that they could do DCS. Our UHF links are all DCS encoded, which tends to reduce the amount of hassle we have with interference. We deployed 7 remote receivers, using an LDG voter at the transmitter site, with 7 Icom UHF receivers there. The remote sites all have one Icom VHF receiver, and one Icom UHF transmitter, along with a power supply, and an NHRC2 controller. It may have cost us a bit more money than buying used radios, but we just didn't have the resources and talent to troubleshoot and repair older rigs. Jim WB8AZP
[Repeater-Builder] GE Master II Mobile
Is there a simple way to have the G3 Tone board stop sending the tone as soon as the reciever input is droped. Randy
Re: [Repeater-Builder] W1GAN and square duplexers
There were a couple of designs that used copper circuit boards to form square boxes for the outer jacket of the duplexer. Size maters as the inner to outer diameter ratio effects the impedance of the cavity. It is my understanding that the optimum impedance for a cavity is approx 70 ohms. Not sure if this is true for cavities, but with helical resonators square shields have higher Q than round ones. You would also probably be better off using a BpBr style design, as I remember W1GANs was for pass cavities which would require 6, BpBr can get away with use 4, they would be similar but only have 1 coupling loop that has a high quality trimmer capacitor such as a johansen or a coaxial gimmic in the ground leg of the loop to set the notch frequency. On Fri, Apr 24, 2009 at 4:19 AM, cruizzer77 atlant...@gmx.ch wrote: Hi Most of you who are into duplexers will know W1GAN's old QST-article A Homemade Duplexer for 2-Meter Repeaters. His design uses 4 copper tubes, but today many duplexer manufacturers use square aluminium profile as duplexer bodies, i.e. Sinclair but others as well. Now I wondered if W1GAN's design could be used for building such an aluminium square tube duplexer as well and if it would work equally well. Does anybody know? Instead of the 4 round tube, would a 4 square tube be used, or does the circumference matter? Kind regards Martin Yahoo! Groups Links
[Repeater-Builder] DeskTrac question
To the learned group(s): I have a 900 MHz DeskTrac which I converted the radio inside to a 16-channel conventional configuration. Now, when I first power up the DeskTrac, the radio beeps seven times, and the channel display cycles rapidly through all modes (1 thru 16) before settling on Mode 1. The radio seems to work OK after this - TX and RX are fine. I have not tried to use a remote with the DeskTrac, but that is my ultimate goal. My problems are: 1) I have tried to read the DeskTrac configuration codeplug with DeskTrac RSS, and it gives me an error message that there is nothing to read. Anyone know what's up with that? Is it because I had to blank the MaxTrac when I converted it to conventional mode? If so, does anyone have a conventional DeskTrac codeplug I can program into the radio? Or do I need to configure one from scratch and force it in? If so, what parameters will I need to set to get the DeskTrac setup properly? and 2) Do I need to configure the DeskTrac codeplug in order to stop the radio from the beeping/channel cycling when it powers up? Since I don't power it down very often, will it hurt anything just to leave it alone (other than drive me nuts knowing SOMETHING is not right), knowing I may not be able to use a remote with it? I have the Service Manual for the DeskTrac, but it makes no mention of programming. (Of course, that's yet another manual Motorola can sell you...) Thanks, Mark - N9WYS
[Repeater-Builder] results of the 220 link issue
I wanted to pass back to everyone my findings on my linking issues. The alnicos I got did not have the tnc's and I did have the pull-up resistor in the cable. I brought it home and hooked it up to my backup repeater at the house and it worked ! So now I find it must be something in the controller which is a cat 1000 so I will address it this weekend and see what I find there. Thanks to all the replies I looked at each one and wanted to provide the results Joe Landers Ke4eue
[Repeater-Builder] Re: DeskTrac question
The Desktrac RSS is limited as what it can do, really only needed to program the remote control board. You may have to use the Maxtrac RSS to read your radio. If the Maxtrac RSS does not 'find' the radio, check the setting on the switch behind the front panel near the builtin mic. That selects 1) first radio 2) second radio 3) the remote circuit board. Mark... wrote: 900 MHz DeskTrac which I converted the radio inside to a 16-channel conventional configuration. Now, when I first power up the DeskTrac, the radio beeps seven times, and the channel display cycles rapidly through all modes (1 thru 16) before settling on Mode 1. The radio seems to work OK after this - TX and RX are fine. I have not tried to use a remote with the DeskTrac, but that is my ultimate goal. My problems are: 1) I have tried to read the DeskTrac configuration codeplug with DeskTrac RSS, and it gives me an error message that there is nothing to read. Anyone know what's up with that? Is it because I had to blank the MaxTrac when I converted it to conventional mode? If so, does anyone have a conventional DeskTrac codeplug I can program into the radio? Or do I need to configure one from scratch and force it in? If so, what parameters will I need to set to get the DeskTrac setup properly? and 2) Do I need to configure the DeskTrac codeplug in order to stop the radio from the beeping/channel cycling when it powers up? Since I don't power it down very often, will it hurt anything just to leave it alone (other than drive me nuts knowing SOMETHING is not right), knowing I may not be able to use a remote with it? I have the Service Manual for the DeskTrac, but it makes no mention of programming. (Of course, that's yet another manual Motorola can sell you...) Thanks, Mark - N9WYS
[Repeater-Builder] Re: Surplus: UHF RCA 500 series repeater / parts
Boy if only I had a few pennies for every one I maintained in Commercial service many years ago.. They are a very good station. Remember RCA mentioned that their 500 Series would last 15 years before the electrolytic capacitors would start drying out and need replacing. Something to think about. New caps are inexpensive now a days. --- In Repeater-Builder@yahoogroups.com, Derek derek...@... wrote: I have a UHF RCA 500 series commercial repeater that was retuned and crystalled for amateur 440 use. It was used as our first 440 repeater and to my knowledge still works, but it has been off the air in storage for about 2 years. It has a transmit exciter, PA, and receiver. Photos are online and available for interested persons. I can part this out or sell it as one unit. All offers accepted as it's only taking up much needed garage space right now. If interested, please email me off list at derekjmu at yahoo dot com.
RE: [Repeater-Builder] Re: DeskTrac question
The MaxTrac RSS reads and writes the radio itself just fine - it's the issues related the DeskTrac, and that annoying start-up glitch - that I'm trying to resolve. I really need to see a working codeplug from a conventional DeskTrac, in order to know whether I have all the external accessory options set correctly - and the remote options for the DeskTrac unit itself. Thanks, Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of motarolla_doctor The Desktrac RSS is limited as what it can do, really only needed to program the remote control board. You may have to use the Maxtrac RSS to read your radio. If the Maxtrac RSS does not 'find' the radio, check the setting on the switch behind the front panel near the builtin mic. That selects 1) first radio 2) second radio 3) the remote circuit board. Mark... wrote: 900 MHz DeskTrac which I converted the radio inside to a 16-channel conventional configuration. Now, when I first power up the DeskTrac, the radio beeps seven times, and the channel display cycles rapidly through all modes (1 thru 16) before settling on Mode 1. The radio seems to work OK after this - TX and RX are fine. I have not tried to use a remote with the DeskTrac, but that is my ultimate goal. My problems are: 1) I have tried to read the DeskTrac configuration codeplug with DeskTrac RSS, and it gives me an error message that there is nothing to read. Anyone know what's up with that? Is it because I had to blank the MaxTrac when I converted it to conventional mode? If so, does anyone have a conventional DeskTrac codeplug I can program into the radio? Or do I need to configure one from scratch and force it in? If so, what parameters will I need to set to get the DeskTrac setup properly? and 2) Do I need to configure the DeskTrac codeplug in order to stop the radio from the beeping/channel cycling when it powers up? Since I don't power it down very often, will it hurt anything just to leave it alone (other than drive me nuts knowing SOMETHING is not right), knowing I may not be able to use a remote with it? I have the Service Manual for the DeskTrac, but it makes no mention of programming. (Of course, that's yet another manual Motorola can sell you...) Thanks, Mark - N9WYS
[Repeater-Builder] Repeater Insurance?
Good Evening Folks, How many of you have repeater insurance? With our new installation, we thought this might be the next step. How much are you paying and who do you have the insurance with? Thanks, Robert KD4YDC http://disneycrazy.smugmug.com/gallery/7943953_gF4Q3 (Hope to get some more pictures up this weekend.)
Re: [Repeater-Builder] Repeater Insurance?
Our insurance in our club consists of lots of spare parts and back-ups. - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Fri Apr 24 20:51:55 2009 Subject: [Repeater-Builder] Repeater Insurance? Good Evening Folks, How many of you have repeater insurance? With our new installation, we thought this might be the next step. How much are you paying and who do you have the insurance with? Thanks, Robert KD4YDC http://disneycrazy.smugmug.com/gallery/7943953_gF4Q3 http://disneycrazy.smugmug.com/gallery/7943953_gF4Q3 (Hope to get some more pictures up this weekend.)
RE: [Repeater-Builder] Repeater Insurance?
We have ours through ARRL. Not sure of the rates, but they're posted on the ARRL website. Mike WM4B _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of georgiaskywarn Sent: Friday, April 24, 2009 9:52 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Repeater Insurance? Good Evening Folks, How many of you have repeater insurance? With our new installation, we thought this might be the next step. How much are you paying and who do you have the insurance with? Thanks, Robert KD4YDC http://disneycrazy. http://disneycrazy.smugmug.com/gallery/7943953_gF4Q3 smugmug.com/gallery/7943953_gF4Q3 (Hope to get some more pictures up this weekend.)
Re: [Repeater-Builder] Repeater Insurance?
Yes, through ARRL plan. Chuck WB2EDV - Original Message - From: georgiaskywarn kd4...@juno.com To: Repeater-Builder@yahoogroups.com Sent: Friday, April 24, 2009 9:51 PM Subject: [Repeater-Builder] Repeater Insurance? Good Evening Folks, How many of you have repeater insurance? With our new installation, we thought this might be the next step. How much are you paying and who do you have the insurance with? Thanks, Robert KD4YDC http://disneycrazy.smugmug.com/gallery/7943953_gF4Q3 (Hope to get some more pictures up this weekend.)
[Repeater-Builder] Re: Repeater Insurance?
--- In Repeater-Builder@yahoogroups.com, NORM KNAPP nkn...@... wrote: Our insurance in our club consists of lots of spare parts and back-ups. Ours too. With cheep/free GE and Motorola radios, and a few used DB224s also cheep/free, we're good and money ahead. Laryn K8TVZ
Re: [Repeater-Builder] Repeater Insurance?
Yes- thru the ARRL, I believe it's thru Marsh insurance. I think its @ $330/yr for a general $2 Mil liability policy. Tom W9SRV --- On Fri, 4/24/09, georgiaskywarn kd4...@juno.com wrote: From: georgiaskywarn kd4...@juno.com Subject: [Repeater-Builder] Repeater Insurance? To: Repeater-Builder@yahoogroups.com Date: Friday, April 24, 2009, 8:51 PM Good Evening Folks, How many of you have repeater insurance? With our new installation, we thought this might be the next step. How much are you paying and who do you have the insurance with? Thanks, Robert KD4YDC http://disneycrazy.smugmug.com/gallery/7943953_gF4Q3 (Hope to get some more pictures up this weekend.) Yahoo! Groups Links
RE: [Repeater-Builder] Re: Repeater Insurance?
The insurance required by most commercial site managers is liability insurance to cover injuries, damages, and lost revenue that could be caused by a Ham repeater. It has nothing to do with covering the replacement of your equipment. One of the local 2m repeaters in my area is on land owned by a petroleum company, and that company's legal beagles require at least $2 million of liability coverage, which costs about $350 per year. That mentality began years ago when a cheap Amateur antenna was sloppily installed at a site and later fell, taking out a couple of antennas belonging to paying customers, and they were very unhappy with that situation. The Ham was kicked off the site, and the bad feelings against Amateur repeaters still exist- and we all are still paying for that bad apple's poor judgment. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Laryn Lohman Sent: Friday, April 24, 2009 8:26 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Repeater Insurance? --- In Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com , NORM KNAPP nkn...@... wrote: Our insurance in our club consists of lots of spare parts and back-ups. Ours too. With cheep/free GE and Motorola radios, and a few used DB224s also cheep/free, we're good and money ahead. Laryn K8TVZ
Re: [Repeater-Builder] Re: Repeater Insurance?
On Apr 24, 2009, at 10:39 PM, Eric Lemmon wrote: The insurance required by most commercial site managers is liability insurance to cover injuries, damages, and lost revenue that could be caused by a Ham repeater. Eric, if you've found any insurance that doesn't contain an injury liability waiver, at any price even close to affordable for a hobby club/organization --let us know where you found it. No commercial site I've seen requires anything other than liability insurance, which more often than not explicitly states it *never* covers injuries of any kind. Check your policy. The last one I looked at from Marsh either had no coverage or a limit that was so low it wouldn't even cover the Ambulance ride. ARRL via Marsh, offers both club liability coverage and also equipment coverage. Neither of which are all that great. The liability policies don't cover legal expenses, for example. So you're likely to run up a legal bill larger than your entire organization's bank account, if you ever actually have to defend the organization against a large liability lawsuit. And one of the gotchas of the equipment coverage is that if you read the fine print it requires that ALL gear, in service or not, owned by the organization be covered. This includes spares, etc. In theory: If they cover your gear at the site, it gets damaged, and they find out later that your organization has other gear in storage that was NOT covered -- the entire contact could be nullified. (By the way I read it anyway.) Ostensibly this is how they afford their low rates. Everything you own must be covered, to pay for the ONE thing that got damaged. Which is the normal insurance risk spreading technique... Buyer beware, when it comes to insurance. Lawyers spent a lot of time with those documents making sure you won't get what you think you're paying for, unless you read the policy! :-) -- Nate Duehr, WY0X n...@natetech.com
[Repeater-Builder] Computer noise in 2M Repeater
Does anyone have any suggestions on how to eliminate noise generated by a Wireless Internet System. The owner of the tower where our club has our 145.370 MHz repeater has rented space to a group who have mounted a wireless Internet relay on the tower. The system is simple, it consist of a Netgear switch, a Microwave dish and a smallYagi. There is approx. 300 feet of Cat 5 wire going up and 300 feet coming down the tower. Their antennas are mounted within a few feet of ours on the top of the 260 ft. tower. We unplugged the netgear switch and the noise cleared, we disconnected our antenna and the noise goes away. The noise rides on the repeater receiver squelch tail. We do use a PL tone or we wouldn't be able to use our repeater at all Jim WK5Y
