Re: [Repeater-Builder] Re: Low Band Antenna for both 6 & 10 meters.

Get 2 CB whips, Cut 1 for 1/4 wave at 10M and cut the other for 1/4 wave at 6M Build a metal spacer bracket. 3 inches long by 5/8" or 3/4" Drill 2 holes on the end and one in the center for the 3/8-24 hardware. Bolt whips to the ends of the spacer, use star style lock washers. Use a 3/8-24 x 3/4"

Re: [Repeater-Builder] Motorola style rack speed nuts and screws

At 11:44 AM 8/20/2010, Oz-in-DFW wrote: All of the compa racks I've seen used spring seel stampings from Tinnerman. You might think they are crappy, but they are inherently vibration resistant. What I think you might be thinking of are cage nuts:

Re: [Repeater-Builder] Motorola style rack speed nuts and screws

All of the compa racks I've seen used spring seel stampings from Tinnerman. You might think they are crappy, but they are inherently vibration resistant. What I think you might be thinking of are cage nuts: http://www.cablesandkits.com/rack-mount-cage-nuts-with-screws-1032-qty-100-p-1120.html

RE: [Repeater-Builder] Motorola style rack speed nuts and screws

The "speed nuts" you refer to are actually called "tinnerman nuts" at Motorola. Bill Hudson Ex-Mo graduation class of 1983 _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Ken Arck Sent: Friday, August 20, 2010 9:40 AM To: Repeater-Bui

Re: [Repeater-Builder] Re: Kenwood TK-690H 29.5-37 MHz, Type 1 radio(s) wanted

Skipp, How did you work the antenna scheme for this radio? Did you use the Motorola docs, or some other method? In my app, I am going to be using a Syntor X on 6 and 10. I was going to use a controller UF output to control a RF relay for the correct antenna based upon what channel the remote b

Re: [Repeater-Builder] antenna plan

B1MGH From: Paul Holm To: Repeater-Builder@yahoogroups.com Sent: Fri, August 20, 2010 8:04:48 AM Subject: Re: [Repeater-Builder] antenna plan Sorry.  VHF.     - Original Message - >From: Chuck Kelsey >I didn't answer because I didn't have a good

Re: [Repeater-Builder] antenna plan

ke. Chuck WB2EDV - Original Message - From: Paul Holm To: Repeater-Builder@yahoogroups.com Sent: Friday, August 20, 2010 9:04 AM Subject: Re: [Repeater-Builder] antenna plan Sorry. VHF. - Original Message - From: Chuck Kelsey I didn't answer b

Re: [Repeater-Builder] antenna plan

Sorry. VHF. - Original Message - From: Chuck Kelsey I didn't answer because I didn't have a good one. I think what you were going to try has a high likelihood of not working well. You didn't saw what band, as I recall. I'd stick with a single antenna. Chuck WB2EDV

Re: [Repeater-Builder] antenna plan

To: Repeater-Builder@yahoogroups.com Sent: Thursday, August 19, 2010 10:25 PM Subject: Re: [Repeater-Builder] antenna plan Hopefully it is not uncool to be the first to respond to one's own post. I'll take the fact that there was no flood of flames, or naysayers, to indicate th

RE: [Repeater-Builder] Polyphaser Question

Tim wrote: > This has been a very interesting thread to watch, and most of the > installations that I've done have been 'add-ons' to existing well > designed systems. > > On a different note, I'm now working on a solar powered system, > and was wondering about the grounding there. Everyth

Re: [Repeater-Builder] antenna plan

 Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 eme@starband.net www.satnetmaine.com 207-210-7469 From: Paul Holm To: Repeater-Builder@yahoogroups.com Sent: Thu, August 19, 2010 10:25:51 PM Subject: Re: [Repeater-Builder] antenna plan

Re: [Repeater-Builder] antenna plan

Hopefully it is not uncool to be the first to respond to one's own post. I'll take the fact that there was no flood of flames, or naysayers, to indicate that my plan is worth attempting. So as a follow-up question, I would ask, could anyone offer recommendations for a yagi, corner reflector, o

Re: [Repeater-Builder] Polyphaser Question

If you have a problem with a ground due to terrain issues, you might want to look into using Lyncole grounding rods. These are hollow copper tubes with a chemical crystal compound inside. The rod has some tapes around breather holes which you remove prior to burying in betonite clay etc.. The to

RE: [Repeater-Builder] Celwave CC460-A circulator

The simplified instructions for tuning an isolator are: 1. Tune input (tx port) for maximum return loss with antenna port terminated in 50 ohms and reject load connected to reject port 2. Tune output (antenna port) for minimum insertion loss, sweeping from tx port to antenna port, again with r

RE: [Repeater-Builder] Polyphaser Question

This has been a very interesting thread to watch, and most of the installations that I've done have been 'add-ons' to existing well designed systems. On a different note, I'm now working on a solar powered system, and was wondering about the grounding there. Everything will be mounted on a single

Re: [Repeater-Builder] Re: Coax length, etc.

There is no way that impedance matching can be accomplished with changing the length of the transmission line in a 50 ohm system when the transmission line used is also of the same characteristic impedance without a compensating shunt XC or XL stub, at a location determined on a Smith Chart plot

RE: [Repeater-Builder] Polyphaser Question

From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of n5sx...@charter.net Sent: Wednesday, August 18, 2010 11:19 PM To: Repeater-Builder@yahoogroups.com Cc: Michael Ryan Subject: Re: [Repeater-Builder] Polyphaser Question Michael Ryan

Re: [Repeater-Builder] Polyphaser Question

Michael Ryan wrote: > > > I notice when looking at the Polyphaser website, there are a wide range of > products, even a wide variety of items that on the surface appear to be > suited to my particular needs. I want to put a Polyphaser on my 220 > repeater. There are DC blocked and unblo

Re: [Repeater-Builder] Polyphaser Question

> > *From:* Repeater-Builder@yahoogroups.com [mailto: > repeater-buil...@yahoogroups.com] *On Behalf Of *Tony KT9AC > *Sent:* Wednesday, August 18, 2010 9:25 AM > > *To:* Repeater-Builder@yahoogroups.com > *Subject:* Re: [Repeater-Builder] Polyphaser Ques

Re: [Repeater-Builder] Polyphaser Question

And to not create (or leave) a path for current flow to destroy equipment. Chuck WB2EDV - Original Message - From: Gary Schafer To: Repeater-Builder@yahoogroups.com Sent: Wednesday, August 18, 2010 8:39 PM Subject: RE: [Repeater-Builder] Polyphaser Question Here is a

RE: [Repeater-Builder] Polyphaser Question

] On Behalf Of Tony KT9AC Sent: Wednesday, August 18, 2010 9:25 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Polyphaser Question Remember the objective is not to take the brunt of a lightning strike, but to drain off any static that would attract that strike

Re: [Repeater-Builder] Celwave CC460-A circulator

Hello Martin Have you contacted Celwave to see if the have tuning specs usually for these. I am not sure if you will get it up to 440 or not. I was told that they are pretty narrowband, but I might be wrong. YMMV Butch, KE7FEL/r On Wed, Aug 18, 2010 at 1:18 PM, cruizzer77 wrote: > > > Does an

Re: [Repeater-Builder] Celwave CC460-A circulator

Hi, Harold Kinley wrote an excellent article in MRT magazine a few years ago on aligning circulators. Maybe they still have re-prints. I have old contact details for Harold Kinley taken from MRT magazine. See below. You should also buy his *Standard Radio Communications Manual, with Instrument

Re: [Repeater-Builder] Polyphaser Question

You might like to look at the latest Motorola R56 Installation standards manual. It's very comprehensive. Has good section on grounding and protective devices. Yes, a good grounding system and a full lightning and surge protection of an RF site doesn't come cheap. But if you live in Florida the l

Re: [Repeater-Builder] Polyphaser Question

l under the clamp. > > > > From: Eric Lemmon > To: Repeater-Builder@yahoogroups.com > Sent: Tue, August 17, 2010 11:30:03 PM > Subject: RE: [Repeater-Builder] Polyphaser Question > > Ray, > > I suggest that you obtain the most recent

Re: [Repeater-Builder] Polyphaser Question

The building has a steel support structure, I'm sure. You will need to bond to that as a start. Bill From: Eric Lemmon To: Repeater-Builder@yahoogroups.com Sent: Tue, August 17, 2010 11:30:03 PM Subject: RE: [Repeater-Builder] Polyphaser Question Ra

Re: [Repeater-Builder] Polyphaser Question

rom: "Joe" To: Sent: Wednesday, August 18, 2010 9:26 AM Subject: Re: [Repeater-Builder] Polyphaser Question > Better than a fraction of a percent protection. I've lost a couple of > polyphasors in the years, but never had lightning damage. I'm a > realist, everything isn't perfect all of the time. > > 73, Joe, K1ike > >

Re: [Repeater-Builder] Motorola Radius GM600 HELP

Hi, This is a European MPT1327 trunked radio. Needs a specific GM600 version of RSS to program it. I saw that the RSS seemed to be available on the web at some HAM sites. Do a web search for Motorola GM600 RSS, OK? Peter On Sun, Aug 15, 2010 at 7:03 AM, dxhunters wrote: > > > Hi > > I cant fi

Re: [Repeater-Builder] Polyphaser Question

Remember the objective is not to take the brunt of a lightning strike, but to drain off any static that would attract that strike. Lightning is just a spark looking to close the gap, and if your antenna is closer to DC ground, it will find something closer to its potential (i.e. static charged)

Re: [Repeater-Builder] Polyphaser Question

On 8/17/2010 11:55 PM, Ray Brown wrote: >What do you do when you want to install a small UHF linking repeater on > a 4-story building that has no lightning protection on its' roof? (this is to > link an ambulance at a hospital to its' base repeater 40 miles away) > >From what I've heard, it

Re: [Repeater-Builder] Polyphaser Question

on at all. Your condom has a hole in it ;-) Chuck WB2EDV - Original Message - From: "Joe" To: 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 &

Re: [Repeater-Builder] Polyphaser Question

mited 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" > To: >

Re: [Repeater-Builder] Polyphaser Question

sday, 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,

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 o

RE: [Repeater-Builder] Polyphaser Question

: Tuesday, August 17, 2010 8:55 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Polyphaser Question What do you do when you want to install a small UHF linking repeater on a 4-story building that has no lightning protection on its roof? (this is to link an ambulance at a

Re: [Repeater-Builder] Polyphaser Question

What do you do when you want to install a small UHF linking repeater on a 4-story building that has no lightning protection on its' roof? (this is to link an ambulance at a hospital to its' base repeater 40 miles away) From what I've heard, it may not be a good idea to hook it to the HVAC, eit

RE: [Repeater-Builder] Polyphaser Question

eater-buil...@yahoogroups.com] On Behalf Of STeve Andre' Sent: Tuesday, August 17, 2010 7:53 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Polyphaser Question This has been a great discussion. Eric, from the reading I've done it didn't seem to me that the Polyphaser

RE: [Repeater-Builder] Polyphaser Question

To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Polyphaser Question This has been a great discussion. Eric, from the reading I've done it didn't seem to me that the Polyphasers were the best out there, but a European company whose initials were S + H, I think.

RE: [Repeater-Builder] Polyphaser Question

bject: RE: [Repeater-Builder] Polyphaser Question I recently opened up a Polyphaser unit we used on one of our remote sites. it covered both 2m and 70cm. We were experiencing poor receive at the site. Replaced the unit and receiver sensitivity is once again hot. Anyone want pics of the in

Re: [Repeater-Builder] Polyphaser Question

to a ground "system" is necessary. Leave one unprotected path available and you've wasted your time. Chuck WB2EDV - Original Message - From: "Eric Lemmon" To: Sent: Tuesday, August 17, 2010 9:53 PM Subject: RE: [Repeater-Builder] Polyphaser Question > Mike,

RE: [Repeater-Builder] Polyphaser Question

Huber and Suhner, I think is who you mean... GOOD stuff, but you pay for it. Headquartered in Switzerland. http://www.hubersuhner.com/products/hs-p-rf/hs-rf-lightning-protectors.htm Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of STeve Andre' This ha

Re: [Repeater-Builder] Polyphaser Question

This has been a great discussion. Eric, from the reading I've done it didn't seem to me that the Polyphasers were the best out there, but a European company whose initials were S + H, I think. Care to comment on the best ones, in your opinion? On Tuesday 17 August 2010 21:53:30 Eric Lemmon wrote

RE: [Repeater-Builder] Polyphaser Question

Mike, Perhaps the best course is to choose the unit with the highest Joule rating that meets your power level and frequency ratings. Do not buy a DC-blocked unit if you don't need that feature, because the capacitor is usually the first component to fail. Do not buy a used unit, because it was p

Re: [Repeater-Builder] Polyphaser Question

*Sent:* Tuesday, August 17, 2010 4:58 PM > *Subject:* Re: [Repeater-Builder] Polyphaser Question > > > > Wasn't there a capacitor too? Seems like there was in one I saw open. > > Chuck > WB2EDV > > > - Original Messag

Re: [Repeater-Builder] Polyphaser Question

The units are probably different depending on whether they are HF, VHF, UHF, or 2.4Ghz, etc. - Original Message - From: Chuck Kelsey To: Repeater-Builder@yahoogroups.com Sent: Tuesday, August 17, 2010 4:58 PM Subject: Re: [Repeater-Builder] Polyphaser Question

Re: [Repeater-Builder] Polyphaser Question

7, 2010 4:37 PM > *To:* Repeater-Builder@yahoogroups.com > *Subject:* Re: [Repeater-Builder] Polyphaser Question > > > > Polyphasers have a shunt protection element. It usually fails and > becomes leaky so you get a l

Re: [Repeater-Builder] Polyphaser Question

Wasn't there a capacitor too? Seems like there was in one I saw open. Chuck WB2EDV - Original Message - From: David Jordan To: Repeater-Builder@yahoogroups.com Sent: Tuesday, August 17, 2010 4:44 PM Subject: RE: [Repeater-Builder] Polyphaser Question I recently o

RE: [Repeater-Builder] Polyphaser Question

ilder@yahoogroups.com Subject: Re: [Repeater-Builder] Polyphaser Question Polyphasers have a shunt protection element. It usually fails and becomes leaky so you get a loss/VSWR indication. It can fail open or short. If it's open, there is nothing to detect.

Re: [Repeater-Builder] Polyphaser Question

ill pass RF if they are blown will > they? - m > > > > *From:* Repeater-Builder@yahoogroups.com > [mailto:repeater-buil...@yahoogroups.com] *On Behalf Of *Chuck Kelsey > *Sent:* Tuesday, August 17, 2010 11:51 AM > *To:* Repeater-Builder@yahoogroups.com > *Subjec

RE: [Repeater-Builder] Motorola Manuals

The manuals have been spoken for. Jamey Wright WR4JW From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jamey Wright Sent: Monday, August 16, 2010 7:16 PM To: 'Repeater-Builder@yahoogroups.com' Subject: [Repeater-Builder] Motorola Manuals I have

Re: [Repeater-Builder] Polyphaser Question

t: Tuesday, August 17, 2010 3:02 PM Subject: RE: [Repeater-Builder] Polyphaser Question Chuck, Thanks for that.wouldn't still pass RF if they are blown will they? - m

RE: [Repeater-Builder] Polyphaser Question

Chuck, Thanks for that.wouldn't still pass RF if they are blown will they? - m From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Tuesday, August 17, 2010 11:51 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Bu

Re: Properly designed PAs (was: Re: [Repeater-Builder] Coax length, etc.)

: Repeater-Builder@yahoogroups.com Sent: Monday, August 16, 2010 10:46 PM Subject: Re: Properly designed PAs (was: Re: [Repeater-Builder] Coax length, etc.) On Aug 15, 2010, at 7:06 AM, Jeff DePolo wrote: > Whoever said "time is money" was an idiot. Time is worth inif

Re: [Repeater-Builder] Polyphaser Question

If you are buying used, buyer beware. They could be shot. Chuck WB2EDV - Original Message - From: Michael Ryan To: Repeater-Builder@yahoogroups.com Sent: Tuesday, August 17, 2010 11:12 AM Subject: RE: [Repeater-Builder] Polyphaser Question Thanks a lot.I see them on

RE: [Repeater-Builder] Polyphaser Question

bject: Re: [Repeater-Builder] Polyphaser Question Hi Michael, Probably for 220MHZ choose between VHF50HN-ME for high powered TX or multiple TX'sand a IS-B50LN-C0-MA is for a single normal power TX. These have the N connectors sexed as you want.Check the power rating of e

Re: [Repeater-Builder] Polyphaser Question

Hi Michael, Probably for 220MHZ choose between VHF50HN-ME for high powered TX or multiple TX'sand a IS-B50LN-C0-MA is for a single normal power TX. These have the N connectors sexed as you want.Check the power rating of each device at your frequency. Peter On Tue, Aug 17, 2010 at

Re: [Repeater-Builder] Tait T-555 UHF Repeater

firstly, i guess a lot comes down to your wallet i would if i was going to make a small time PRS repeater, prefer to use maybe a couple of Tait 2020's and ( Duplexor versus twin aerials ) tin shed up on the hill out back versus a 40meter high ( Or more ) tower don't get me wrong t555 are the old

Re: Properly designed PAs (was: Re: [Repeater-Builder] Coax length, etc.)

Nate, My sincerest thoughts are with you in this time. Don, KD9PT - Original Message - From: Nate Duehr To: Repeater-Builder@yahoogroups.com Sent: Tuesday, August 17, 2010 12:46 AM Subject: Re: Properly designed PAs (was: Re: [Repeater-Builder] Coax length, etc

Re: Properly designed PAs (was: Re: [Repeater-Builder] Coax length, etc.)

On Aug 15, 2010, at 7:06 AM, Jeff DePolo wrote: > Whoever said "time is money" was an idiot. Time is worth inifinitely times > more than money. You can make more money. You can even borrow money. > Hell, if you were desparate you could even steal money. You can't do any of > those things with tim

Re: [Repeater-Builder] Re: Tait T800 Series II

niteviser wrote: > Hi Ed, > > I have read the info again and it's a bit confusing. In the -26 variant the > IC700 reference is 539-00010-55 and the standard is 539-00010-50. But there > were different devices used under the 539-00010-50 number an 'old' one by NDK > and a 'new' one made by Rakon

Re: [Repeater-Builder] Re: Fs: (/\/\)otorola UHF Desktrac

: Repeater-Builder@yahoogroups.com Sent: Monday, August 16, 2010 1:29 PM Subject: Re: [Repeater-Builder] Re: Fs: (/\/\)otorola UHF Desktrac how about the duplexer? - Original Message - From: "Brian Raker" To: Sent: Monday, August 16, 2010 3:26 PM S

Re: [Repeater-Builder] Re: Fs: (/\/\)otorola UHF Desktrac

how about the duplexer? - Original Message - From: "Brian Raker" To: Sent: Monday, August 16, 2010 3:26 PM Subject: Re: [Repeater-Builder] Re: Fs: (/\/\)otorola UHF Desktrac > You can pick up programmed UHF Desktracs on ebay for ~150, programmed. > Like > Joe said

Re: [Repeater-Builder] Re: Fs: (/\/\)otorola UHF Desktrac

You can pick up programmed UHF Desktracs on ebay for ~150, programmed. Like Joe said, Desktracs are not high-duty cycle repeaters (not good for Ham Radio) , as well they are not NB capable so commercial uses are about out. I sold my two for $100 each, unprogrammed. -Brian / KF4ZWZ On Sun, Aug 1

Re: [Repeater-Builder] Re: Tait T800 Series II

niteviser wrote: > OK Ed, > > I have 2 files showing the PCB details with -26 variant info. They frequency > reference is still kept totally internal. If higher stability or external > reference is available, the internal is removed and a mini coax socket fitted > to have a cable connected to h

Re: [Repeater-Builder] Re: Tait T800 Series II

niteviser wrote: > Ed, > > The tuning pin is the FM pin of the 12.8MHz module. There were several 12.8 > MHz references some with 3 pins and then some with 4 pins which used the half > rail to set the frequency mid point. It was quite acceptable to program to > the closest frequency on the Epr

Re: [Repeater-Builder] Re: unsubscribe (reading yahoo group posts - a butter way - no popcorn)

neat, clean and easy. :-) John Hymes La Rue Communications 10 S. Aurora Street Stockton, CA 95202 http://tinyurl.com/2dtngmn - Original Message - From: Andrew Seybold To: Repeater-Builder@yahoogroups.com Sent: Saturday, August 14, 2010 6:21 PM Subject: RE: [Repeater-Builder] Re:

Re: [Repeater-Builder] Motorola Saber Batteries

On Mon, 16 Aug 2010, Aristotle Zoulas wrote: > Hello , I know this is not a "Repeater Building" questions but most of > us either have or had Saber radios's. What is the best source of > replacement batteries. I bought a 2700 mah battery from ebay and its > way too tight, only goes on 2/3 of the

Re: [Repeater-Builder] Re: Tait T800 Series II

niteviser wrote: > Hi Ed, > > The differences I see between the -25 and -26 are minor. Caps and resistors > in the Low Pass Filter audio stage and a different 12.8Mhz reference with a > voltage tuning pin, where the standard didn't have it. The specifications of > the reference are same otherwi

Re: [Repeater-Builder] Coax length, etc.

Either way, I give up. 73 Gary K4FMX *From:* Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] *On Behalf Of *Russ Hines *Sent:* Sunday, August 15, 2010 7:37 PM *To:* Repeater-Builder@yahoogroups.com *Subject:*

RE: [Repeater-Builder] Coax length, etc.

I know I'm going to regret stepping into this one, but since when has that stopped me before... > Thanks, Gary, for admitting the 43 doesn't measure power > directly. What do you mean by "measure power directly"? If you're talking about comparing a thruline measurement against absorptive/cal

Re: [Repeater-Builder] Tait T800 Series II

Ken Arck wrote: > At 10:10 AM 8/13/2010, Steve wrote: >> >> Hi >> the T800,s both series one and two are great, series one uses eproms >> series two is an eeprom programmed using a single data line via an rj11 >> skt on the front and rear. In the UK a series two sells for around 400ukp >> a low ban

RE: [Repeater-Builder] Coax length, etc.

nt: Sunday, August 15, 2010 7:37 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Coax length, etc. Last round. Hi again, Gary. ;-) On 8/15/2010 7:09 PM, Gary Schafer wrote: Hi again Russ, _ From: <mailto:Repeater-Builder@yahoogroups.com>

Re: [Repeater-Builder] Coax length, etc.

Russ Hines wrote: Hi Kevin: Regarding temperature, our club has a site, no A/C or heat, where temperatures inside the shelter can get below +20 deg F in winter, and well over 130 deg F in the summer heat. I can't imagine filter tuning not changing under such conditions, Invar or not. I can

Re: [Repeater-Builder] Coax length, etc.

, August 15, 2010 4:54 PM *To:* Repeater-Builder@yahoogroups.com *Subject:* Re: [Repeater-Builder] Coax length, etc. I see some folks are heading for the Advil. My apologies. Thanks, Gary, for admitting the 43 doesn't measure power directly. One myth down. Of course, it is a direct

RE: [Repeater-Builder] Coax length, etc.

Hi again Russ, _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Russ Hines Sent: Sunday, August 15, 2010 4:54 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Coax length, etc. I see some folks are

Re: [Repeater-Builder] Henry C100D10R Repeater Amplifier Fuse Rating ?

Fuses protect wiring. Equipment should be fused to match the power handling level of the leads that supply it. For a 100 watt mobile, I would choose 10ga wire (unless the leads needed to be quite long) and fuse it at 30amps. 73 Paul - Original Message - From: "hfd_firefighter"

Re: [Repeater-Builder] Tait T800 Series II

Hi glad to help. That price is a bit high,ex demo or not, it is still secondhand and I would imagine $800-850 to be a fair price 73 Steve - Original Message - From: "Ken Arck" To: Sent: Sunday, August 15, 2010 10:53 PM Subject: Re: [Repeater-Builder] Tait T800 Series II

Re: [Repeater-Builder] Coax length, etc.

I see some folks are heading for the Advil. My apologies. Thanks, Gary, for admitting the 43 doesn't measure power directly. One myth down. Of course, it is a directional coupler, no argument. That makes it a reflectometer, it enables the instrument to isolate forward/reflected samples t

Re: [Repeater-Builder] Tait T800 Series II

At 10:10 AM 8/13/2010, Steve wrote: > > >Hi >the T800,s both series one and two are great, series one uses eproms >series two is an eeprom programmed using a single data line via an rj11 >skt on the front and rear. In the UK a series two sells for around 400ukp >a low band series one for around 200

RE: [Repeater-Builder] Coax length, etc.

Agreed!! Mark - N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com On Behalf Of Eric Lemmon (major "snippage") This discussion is both informative and quite entertaining! 73, Eric Lemmon WB6FLY

RE: [Repeater-Builder] RG-142, RG-400 va RG-223

Lemmon Sent: Wednesday, August 11, 2010 5:20 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] RG-142, RG-400 va RG-223 Sid, RG-223 will be fine, provided that you use silver-plated connectors that are specifically designed for that cable, and avoid using any barrels or

Re: [Repeater-Builder] new member introduction

On Sunday 15 August 2010 02:27:17 ZephyrNYC wrote: > On Sat, Aug 14, 2010 at 20:32, Nate Duehr wrote: > > Very little, typically. Almost all have solid-state components that would > > be utterly dead after an EMP. Tube gear that survives EMP better is > > virtually all gone. And user radios are r

RE: [Repeater-Builder] Coax length, etc.

Russ, Of course the Bird 43 does not measure power directly. But it does sample voltage AND current on the line in amounts that are combined to indicate power. It is a directional coupler. The only time you will have a problem with it deviating from its accuracy is when the directivity becomes

RE: [Repeater-Builder] Coax length, etc.

I've brought that issue up a few times, and usually get the blank radio shack salesman type of stare. -- Original Message -- Received: Sat, 14 Aug 2010 08:45:47 PM PDT From: "Jeff DePolo" > > There is no simple rule of thumb, and if anybody tells you that there is, > ask them how do you

Re: [Repeater-Builder] Digital repeater sidebands??

I guess you say what type of modulation and bandwidth are you using for the new Digital Repeater? Should not be any problem. The digital modulation mask are getting more efficient in the use of the spectrum as channel bandwidth get narrower. The name of the game is to get more spectrum efficiency

Re: [Repeater-Builder] Digital repeater sidebands??

I just realized that we also have another commercial analog repeater in the 420-430MHz band, so close in sidebands would also be a concern. Burt VE2BMQ Burt Lang wrote: > Hi folks > > We have a digital repeater in the 420-430 MHz subband that is being > installed shortly on our site. I am conc

RE: Properly designed PAs (was: Re: [Repeater-Builder] Coax length, etc.)

> Jeff, out of all the PAs you've seen out there, both commonly > used and not-so-common... which ones (in your opinion) are > properly designed (when "working right")? I think a lot of them, generally speaking, are properly designed. That's not to say that some of them don't have some downside

RE: [Repeater-Builder] Coax length, etc.

> Actually I think that even though Service Monitors have > finally become *relatively* commonplace in the Ham Shack, the > VNA is not something "most" hams have seen or know how to use. For $100, Rick's (Amtronix) return loss bridge is a must-have for anyone that has a SM with a SA/TG. With it

RE: [Repeater-Builder] Coax length, etc.

> But why? If all of the power (or, let's hope, at least > 99.99% of it) > > is > > on-channel, *should* a properly-designed and properly-functioning > > transmitter misbehave due to the poor match a duplexer presents at > > frequencies far removed from the channel center? > > Well yes, prope

Re: [Repeater-Builder] Coax length, etc.

I don't know about that. Anritsu SiteMaster and CellMaster test sets are fairly common test equipment available to cell techs here in Connecticut. Whether they use them (or know how) is another thing. Joe On 8/15/2010 2:59 AM, Nate Duehr wrote: > What's up with the RF industry not buying thes

Re: [Repeater-Builder] new member introduction

On Sat, Aug 14, 2010 at 20:32, Nate Duehr wrote: > > Very little, typically. Almost all have solid-state components that would > be utterly dead after an EMP. Tube gear that survives EMP better is > virtually all gone. And user radios are required for any repeater to be > useful, and they'd all

Re: [Repeater-Builder] Coax length, etc.

Hi Kevin: Regarding temperature, our club has a site, no A/C or heat, where temperatures inside the shelter can get below +20 deg F in winter, and well over 130 deg F in the summer heat. I can't imagine filter tuning not changing under such conditions, Invar or not. I can see over time whe

Re: [Repeater-Builder] Coax length, etc.

On Aug 14, 2010, at 9:45 PM, Jeff DePolo wrote: > Well, kinda. Many duplexers are spec'ed for 1.5:1 (14 dB RL) input VSWR > max. Fortunately, I rarely see any that are that bad. I'll gladly trade > off a tenth of a dB of insertion loss for several (if not 10 or more) dB of > return loss improveme

Properly designed PAs (was: Re: [Repeater-Builder] Coax length, etc.)

On Aug 14, 2010, at 9:45 PM, Jeff DePolo wrote: > I disagree. I would accept the notion that the transmitter may not be > "happy" (and I put that in quotes not to mock you, but becuase I can't come > up with a better word either) because it is not *properly matched* when > looking into a 50+j0 lo

Re: [Repeater-Builder] Re: unsubscribe (reading yahoo group posts - a butter way - no popcorn)

On Aug 14, 2010, at 7:01 PM, Chuck Kelsey wrote: > I'm the opposite. I want all my email dumped in one inbox. I'm afraid if it > gets sorted to different folders, something's bound to get missed. Just like > the mailman puts all my snail mail in one mailbox. Works just fine. Same > reason I pr

RE: [Repeater-Builder] Coax length, etc.

> -Original Message- > From: Repeater-Builder@yahoogroups.com [mailto:Repeater- > buil...@yahoogroups.com] On Behalf Of Jeff DePolo > Sent: Saturday, August 14, 2010 10:45 PM > To: Repeater-Builder@yahoogroups.com > Subject: RE: [Repeater-Builder] Coax length, etc

RE: [Repeater-Builder] Coax length, etc.

OK, I think, for the most part, we're on the same page. I'm cuttin' and trimmin' a lot here... > And this is where I believe the duplexer manufacturers are > covering their butt. They don't want the problem with > complex reactance presented by the duplexer to be their > problem. Not that

RE: [Repeater-Builder] Coax length, etc.

> Jeff, you aren't stepping on my toes at all. Glad to see your > comments. OK, good. Since you've never met me, I can assure you, you definately DO NOT want me stepping on your toes, it would be painful. > I do have to agree with Kevin that most duplexer > manufacturers recommend different ca

RE: [Repeater-Builder] Coax length, etc.

> So will someone post a simple rule of thumb. If you have the > option of optimizing cable length from PA to first cavity, IE > you haven't made them yet what's the best "simple" rule of > thumb to follow to build them to avoid reactance. 1/2wl if > allowed minus coupling loop depth? Or is tha

Re: [Repeater-Builder] Coax length, etc.

Ross Johnson wrote: So will someone post a simple rule of thumb... If you have the option of optimizing cable length from PA to first cavity, IE you haven't made them yet what's the best "simple" rule of thumb to follow to build them to avoid reactance. 1/2wl if allowed minus coupling loop

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