Re: [Repeater-Builder] Diamond X-50 NA

John Mackey wrote: > Anyone have any opinions on the Diamond X-50NA? I have an application > to use it for a simple repeater on UHF. > > > Out of all the Diamond, Comet and similar antennas on the market I have experience with the X-50 the the only one worth buying. I have a X-50 that I bou

Re: [Repeater-Builder] Height Gain figure

I've seen several instances where doubling the antenna hight typically adds about 20 percent more coverage over normal terrain. Of course this has it's limits since the earth hasn't been flat for many hundreds of years. I once saw a SMR operator spend about 100K to go from 200 feet to 450 fee

Re: [Repeater-Builder] So I watched it NBC Dateline story on Tower Climbers

Paul Finch wrote: > The hard hat is a OSHA regulation.. > > And it's a good one. There's no way to be sure there isn't some loose hardware overhead that may be shook loose while climbing. Also a hard hat will save you head from banging into an overhead side mount or guy wire. I've had

Re: [Repeater-Builder] Feedline Connector Sealant Tape

I've never used the C-Tape but I suspect it's the same stuff available at marine supply stores called Rescue Tape. http://www.rescuetape.com/ Dex Jim Cicirello wrote: > Hi Guys, > A cell phone Tower Tech. gave me some Cell-Tape (C-Tape) for weather > proofing connectors. I used some tonight on

Re: [Repeater-Builder] Can anyone identify this old antenna?

I was given several of those about 20 years ago. At that time they appeared to have been in use for at least 20 years so I suspect the design goes back at least into the 60's. My guess is they were made by Phelps Dodge which was a popular commercial antenna manufacture during that time. W4DE

Re: [Repeater-Builder] Req: repeater list on the East coast ... traveling from NYC to FL

Ken, Going to attend the Southeastern VHF Conference in Orlando? If so I'll be looking for you. While traveling I-95 thru NC you will find good coverage from the Brodway repeaters. 147.105 + 0 Click here for More Info

Re: [Repeater-Builder] Re: Antenna Tower

Thanks Paul. Guess I picked up the www by clicking on the first part of the original link then pasting the work wrapped part. If that tower was in my area there is a local crane operator who would lay that stick down for less than $500 and no one would even have to climb. Dex Paul N1BUG wro

Re: [Repeater-Builder] Re: Antenna Tower

I've tried several ways to put the link together with no success. These don't work for me: http://www.good-times.webshots.com/album/562985533mLTuoH http://www.goodtimes.webshots.com/album/562985533mLTuoH Is the picture still available? I've seen some 40+ year old towers that are still in very

Re: [Repeater-Builder] The emails we get at repeater-builder....

Wasn't the original post on this subject about the emails sent directly to the repeater-builder webmaster and owners and not about the post that are made to the email reflector? If so I believe this discussion has got off course. Dexter

Re: [Repeater-Builder] WiFi interference to UHF?

Ken, I've had that problem on several systems. Running shielded CAT5 took care of most of the noise. I still can detect the noise on a very weak carrier received by the UHF repeaters but it's not bad enough to degrade service. The interfering signals aren't present all the time. They seem

Re: [Repeater-Builder] Radio coverage prediction software

jimmyrtle wrote: > Has anyone ever used this website for predicting repeater coverage? > I'm not sure what the dBuV/m values for the coverage display should be. > Any suggestions? > > Thanks, > Jim > Just tried it Jim and it tracks very well with the coverage I get from several sites. Thank

Re: [Repeater-Builder] Astron RS-35M pass transistor Socket

The most reliable solution is to just break those flimsy socket pins off and solder the wires directly to the transistor leads. I've had several supplies fail because of these type sockets. I suspect the transistor may have failed because of the heat produced by the small contact area of the

Re: [Repeater-Builder] Heliax

[EMAIL PROTECTED] wrote: > Any suggestions on what to use for a jumper between the > Heliax and the antenna for the last few feet to provide > flexability and make it easier to get the cable into the > antenna mount? RG-214 Dex

Re: [Repeater-Builder] Heliax

[EMAIL PROTECTED] wrote: > 2M and it's a 50' run of LMR400 with a short coax jumper > at the antenna. At 150 MHz 100 feet of LMR400 has about 1.5 db loss At 150 MHz 100 feet of LDF4-50 has about 0.815 db loss Your 50 feet of LMR400 if good has about 0.75 db loss And if replaced with 50 feet of

Re: [Repeater-Builder] Heliax

[EMAIL PROTECTED] wrote: > I just picked up some Andrew LDF4-50A at a good price but > it has a cut in the cable about 1/2 of the legnth. Do > they make splices for this cable and if so am I better > with that than putting on connectors and using a barrel > connector between them to make the r

Re: [Repeater-Builder] Call Sign and Sounds like a Ham, NOT

Fred Seamans wrote: > Not all WD are experimental calls. My XYL had WD5DXK call as a > General until she let it expire in Oct. 2006. All the experimental calls I know of with a WD prefix are WD2. I hold WD2XKO authorized for 2200 meters (137 kHz) and am one of the WD2XSH 600 meter (505 kHz

Re: [Repeater-Builder] Digipeater deviation

Nevada Amateur Radio Repeaters, Inc. wrote: > What is the allowable deviation for a two meter digipeater in amateur > service? Is 15 kHz excessive? Yes 3.5 to 4.0 kHz will work fine when received by a properly set up digipeater. W4DEX > > > > > >

Re: [Repeater-Builder] coaxial

William A. Fourneau wrote: > PLEASE I NEED HELP TO MAKE THE WIRING BETWEEN A REPEATER AND A > DUPLEXER, OF WHICH SO LARGE THE WIRING IS PLACED THAT CONNECTS THE > REPEATER WITH THE DUPLEXER. La necesidad del cable para sólo ser de alcanzar lo suficiente. Ninguna longitud especial es requerida.

Re: [Repeater-Builder] Old Vhf Engineering diode matrix cwid

retiredcss01 wrote: > I've got a class of new prospective Hams and I am using the cwid as a > project. The info I got off repeater-builder is not clear enough for > me to proto a board. Does anyone have a good copy of the component and > solder side of the pc board? The front cover of the man

Re: [Repeater-Builder] Coax

Gerald Bishop wrote: > Hi- Kind of off subject- our group was given a bunch of RG177U,Looks > to be heavy duty coax. Would anyone know impedance ,and if it can be > used for repeater usage? Tks,Jerry Seems to be 50 ohm: http://www.rfcafe.com/references/electrical/coax_chart.htm Dex

Re: [Repeater-Builder] Re: Hamtronics (and VHF Engineering) Manuals

skipp025 wrote: > A big thank you to Dexter for making his COR-2 scans available to > Chris & I. Glad to help. Getting rather old myself I have a lot of older manuals in my file cabinet. Certainly to much to set down and scan it all so I've been doing it on an as needed basis. Here's an ind

Re: [Repeater-Builder] Wanted: Original Hamtronics COR module manual

I'm fairly sure I have a copy. If no one else replies soon I'll scan it for you. Dex, W4DEX kt4xa wrote: > I'm looking for the manual for the original Hamtronics COR > module--that is, the OLD one from the early 80's that predates the > COR-2 and COR-3. Hamtronics no longer has the manual, and

Re: [Repeater-Builder] Mini - UHF Connector

Mike Morris WA6ILQ wrote: > I've had no problems after I put a o-ring around the center pin and > pushed it up inside the plug. Great idea Mike! I can see how the o-ring will keep a little pressure on the connector threads to keep it from vibrating loose. Thanks, Dex

Re: [Repeater-Builder] Mini - UHF Connector

The only sure way to keep these silly connectors from coming loose is to use Lock Tight! No other way to keep them on when the radio is installed in heavy equipment and farm vehicles. Just make it permanent and when the radio needs to be removed cut the coax and make a pig tale of it with a d

Re: [Repeater-Builder] LMR feedline revisited and revised!

Gary wrote: Yes I know you can plug an N connector into a bnc. Yes you can but I believe you will find the pin on a N male is larger than a BNC female is designed to take. A 75 ohm N pin is probably close to the same as a BNC. Years ago after finding broken BNC jacks on some high d

Re: [Repeater-Builder] LMR feedline revisited and revised!

> Wby would you even use pl259 connectors on uhf ? > Because a PL-259 is required for the best mobile UHF radio ever made. Motorola Syntor X W4DEX

[Repeater-Builder] RELM SMX921 Repeater

Anyone familiar with the RELM SMX921 repeater? I wonder if the VHF model will program down into the ham band? http://www.relm.com/spec_sheets/SMX_921.pdf W4DEX

Re: [Repeater-Builder] Need Help... where can I buy a DSL-Internet repeater...?

The best 802.11 units for the money I found are the Senao NL-2611CB3 radios. They run 200mw and there is also a 400mw version. Also the receivers in these units are better than most low end radios. I have a 2.5 mile non line of site path working with these units for two years now with no troub

[Repeater-Builder] DingoTel 2Way radio internet bridge

Anyone have any experience with this device? http://www.dingotel.com/2way/index.asp Dex Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your

Re: [Repeater-Builder] Simple ID unit

Someone suggested an ID board listed on eBay. I was looking for a cheap versatile ID board for a microwave beacon so I bought the kit. It arrived promptly and I assembled it this morning. It took maybe one half hour to install the components on the board and have it connected to the computer

Re: [Repeater-Builder] Linking Suggestions Please

Just to keep in stride with some other suggestions, you could lease a dedicated circuit from the local telco or how about a fiber line from the cable company? That should keep your pockets purged :) Maybe I missed something but I would consider just linking the two repeaters with a 220 receive

Re: [Repeater-Builder] Re: OT: NC man charged with 'driving a cop car' due to ham antennas

Fred Fitte wrote: >Having a radar unit is perfectly legal. > > > But using it on the highway can get you in trouble. I know someone who almost got boxed up by a group of 18 wheelers when they figured out the signal lighting up their radar detectors was coming from a personal vehicle. A l

Re: [Repeater-Builder] DB408 vs. DB420

Depends upon your terrain. If you are in the flat lands I would suggest the 420. Otherwise I would use a 408. W4DEX georgiaskywarn wrote: >I am curious if anyone has gone from a DB420 to a DB408 (or the other >way). I may have to go up on another tower (before the present tower >I am on come

Re: [Repeater-Builder] IOTA Switched Power Supply and Noise?

Anyone have an idea how much power would be saved by running a MSF-5000 that is idle most of the time from a switcher instead of the stock heavy iron power supply?. The transformers produce a lot of heat just in standby mode. I have several of these machines on line and also a GE repeater wit

Re: [Repeater-Builder] WEATHER RELATED STATIC

Dave VanHorn wrote: If you've not seen what happens in southern CA with the Santa Ana winds, you'd never believe it. AMAZING levels of noise right across the VHF spectrum. AFAIK, not much you can do about that. Kevin Custer wrote: > Charged particles of dust, rain, snow, or anything else bangi

Re: [Repeater-Builder] Morse Code Contest on JAY LENO

Don wrote: > > The Morse code team will consist of Chip Margelli K7JA and Ken Miller > K6CTW. > > Chip and Ken do a lot of contests and DXpeditions. Joe Drago, props > manager for the show is KF6OCP. > > Chip and Ken did a great job, especially with the pressure of being on TV and with the a

Re: [Repeater-Builder] Caution on Bomar Crystals

I understand your frustration Mark. However each time I've done a phone order from Bomar they have told me the total for the order while on the phone. They started the $50 minimum order several years ago but I don't see any mention of this on their web page. I've had a few problems with Boma

Re: [Repeater-Builder] Re: please identify unknown 222Mhz repeater equipment

Chris Peterson wrote: > Thanks very much for helping not only identify these, but find docs for them > also. > > Thanks even more for not letting this degenerate into a flame war about VHF > Engineering. I think this is the first time a VHF Engineering question has been asked without a bunch o

Re: [Repeater-Builder] Cell Phone

Benjamin Naber wrote: > Here's something else to be figure out > > Who invented the cell phone and what was the > original use? And where was the first tower installed? > The subject is OT but..somewhere I have a late 70's AT&T "Bell Labs Record" magazine which featured this new technol

Re: [Repeater-Builder] Astron parts

Jeff Corkren wrote: > Where is the best place (other than Astron) to purchase 2N3771 pass > transistors for a Astron power supply ? I recently ordered these from Digikey. Have also seen them listed on eBay from a guy in NJ. Dex Yahoo! Groups Links <*> To visit your group on the web, go

Re: [Repeater-Builder] 220 Mhz. repeater

Perhaps the repeater buyers would like to start a "Repeater-Buyers" group and leave the technical challenges to real repeater builders. Dex Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this grou

Re: Fw: [Repeater-Builder] Hamtronics, Inc.--Looking for Recommendation or info

I agree in general that converted mobiles make good ham repeaters. But if I wanted a compact energy efficient repeater I would consider using the Hamtronics boards. I've had lots of experience with both units on VHF and UHF. The Hamtronics boards will cost you a lot more but you will learn

Re: [Repeater-Builder] A big THANK YOU!

russ wrote: > > I would like to thank every > one who told me about the DB-228! > Wow! You guys where right! I bought > one last week and it got installed this > morning in Ocean City NJ. I now can > work the 147.285 in Glassboro NJ > mobile! On the DB-224 I could work > it from the base but not

Re: [Repeater-Builder] RG 9 and RG 55

TOM MANNING wrote: > Glenn and T.J. > If my memory serves me well the RG-55 was replaced with RG-223/U > Tom Manning , AF4UG > I have several fairly new BNC cables labeled RG-55/U made by Fujikura. I think they came with an Anritsu Site Master. Dex Yahoo! Groups Links <*> To visit your

[Repeater-Builder] IFR-1200S power sensor device help

Anyone know of a source for the load resistor which is used in a IFR-1200S service monitor? The device is labeled "ACR 0603, CR1060". A picture can be seen at: http://w4dex.com/temp/ifr_1200s_power_sensor.jpg Thanks, Dexter Yahoo! Groups Links <*> To visit your group on the web, go to

Re: [Repeater-Builder] DC grounded antennas - ?

Benjamin Naber wrote: > thought the same you did, but nope didn't help > > Any one else? I suspect the addition of the arrestor changes your match because the antenna isn't properly matched to begin with. Try adding adapters to the coax equal to the length of the arrestor to see if you get

Re: [Repeater-Builder] Re: Astron Supply Help

Mike WA6ILQ wrote: > > > Do you, by chance, have a manufacturer's name? > product info (i.e. product name, part number)? > Is one known to work better then the other? > GC Type 44 I think is a non silicon heat sink compound. I used it while working with AT&T on microwave TWT amps. It also has

Re: [Repeater-Builder] MGF1502 or or 1402 or 1302 GasFets's

I have used the mgf1902 to replace 1302. The 1902 is available from Down East Microwave. Very nice people to deal with. You will find the 1902 listed about 3/4 way down on this page: http://www.downeastmicrowave.com/cat-frame.htm GL, Dex w9mwq wrote: > Anyone have a good source available for

Re: [Repeater-Builder] Rockwell antenna

Rick - VA3RZS/Charlotte - VA3CMR wrote: > > was looking for a little more info then that .. > > will it move down to the ham band .. has any one cracked it open to > retune it ? > Rick, I can't help you with any details on the antenna you have but I did once work with 225-400 MHz ground to air

Re: [Repeater-Builder] VHF Engineering Repeater

John, VHF Eng RX info available here: http://www.w4dex.com/manuals.htm W4DEX kf4vgx wrote: > > This Repeater RX series receiver has four boards connecting together > to complete the receiverAS 2 , FM 455 , IF 10.7 , RF 144. > > Question is there anyone in this group > familiar with this

Re: [Repeater-Builder] Re: 75 to 50 ohm match

I have seen 75 ohm cable work well with 50 ohm systems. The slight loss due to VSWR is offset by less loss in 75 ohm over 50 ohm for the same size cable. If one wants to trim the cable to provide a perfect match I would suggest this method. Measure the power at the output of the transmitter into

Re: [Repeater-Builder] Motorola Syntor, any good?

A pair of Syntor UHF units configured as a repeater has performed flawlessly for several years at this site: http://www.w4dex.com/kc4fwc/444575.htm Dex Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

Re: [Repeater-Builder] NOAA Weater alerts

This subject is one of those that seems to make a regular appearence on this reflector. Since there are may repeaters sending the automatic wx alearts I think if the FCC saw this as a problem someone would have been reprimanded for doing so. Anyone aware of this happening? Dex Your us