[Repeater-Builder] Re: Ham installation quality/non-quality

[T.J.]

The funny/sad thing is I've seen professional installs that are on the same 
par as that also.  It's hard to believe people get away charging for these type 
installs and stay in business.  In fact I was at one of my work sites today 
installing a PDR3500 as a temporary repeater and saw a similar setup by a 
commercial company that I know sells time on their community UHF repeater.  GE 
mobile as a receiver, Motorola radius as a transmitter hooked to a Selectone 
community tone panel with RG58 strung across the room to the 
multicoupler/combiner.  What sad is my backyard repeater is setup much better 
than that and pry works much better too.  Glenayre pager transmitter and 
Motorola Spectra-Tac receiver with a Link Comm Club Deluexe controller hooked 
to my Kenwood TS-2000.  Hardline on everything but the HF off the Kenwood.  
What even sorrier is when people (hams at one of my work sites) spend thousands 
of dollars on a complete D-Star system and computer
 with internet line to the site and run RG-8 and Ham sticks on the tower for 
their antennas.  What a waste, that's the best thing you can do to kill a brand 
new would have been good system.  Least they could have done is buy some good 
commercial mono band antennas for the repeaters.  Would have only cost a couple 
hundred extra, and the system would have worked ten times better.  Oh well 
can't make everyone understand common sense and logic.

T.J.



Ham installation quality/non-quality
    Posted by: Nate Duehr n...@natetech.com wy0x
    Date: Mon May 4, 2009 11:53 am ((PDT))

Nightmare f-ing Hams! story from this weekend:

I went to a site this weekend, and the new Amateur repeater in the new
building the hams are moving into had 200' of 1/2 Andrews hardline on it
that I don't even know how it was operating... it looked like someone
had taken a ballpeen hammer to it at 5' lengths all the way across the
ice bridge and up the tower.  The hardline run was done INSIDE a tower
leg instead of properly up the outside cable tray/unistrut with no
hangers, and no grounding kits on the run of 1/2 anywhere.  

There was a ham grade Comet triplexer bolted to the back of an open
rack, with two ports terminated, and one open, and three mobiles and a
mobile duplexer for the repeater sitting on a shelf, everything
connected with RG-58, plugged into the triplexer so the link radio could
be connected to the same feedline/antenna, and then 9913 for the jumper
from the diplexer to the polyphaser panel (amazingly, they used a
polyphaser!)... then a dual-band ham-grade antenna (also looked like a
Comet - we didn't send the tower climbers up there) at the very tippy
top of the tower that was already looking like it was loose in the sites
regular 50+ MPH winds.  The power supply looked like maybe it was a
Micor supply, but more likely was homebrew to run someone's gear at
home, years ago.  The whole repeater cabinet was plugged into the tool
power outlet on the wall, and not to the overhead 15A twist locks at the
site that are supposed to be equipment power.  No grounding cable was
attached to the cabinet or to the overhead halo system.

Meanwhile the two groups that went up were installing brand new 7/8
hardline and connectors on the new tower, putting that hardline into the
cable trays, new polyphasers, RG-400 or better jumpers from the panel to
their enclosed cabinets, new Sinclair antennas, grounding kits on all
hardline, etc.  We also ripped down all the abandoned 7/8 and chunks
in the hangars, took all the clipped and abandoned wire ties on the
tower and ice bridge off and threw them away, removed extra hangars
and stored them in the building, removed three runs of #8 bare copper
wire strung down the ice bridge as a ground from the tower to the
building, which would just be an intermod/noise-maker, reattached the
tower ground the both the ice-bridge and the ground rod temporarily,
(were going to do a cadweld, but it was raining and no one had a grinder
to clean the surfaces properly), picked up all site trash, etc.

There are GOOD ham radio tenants, and bad ones... that's for sure.  If
it were up to me, I'd have made ONE phone call to this guy saying his
repeater was no longer welcome at the site, disconnected it, changed the
door code, and set that mobiles in a cabinet hunk of junk out in rain
under a tarp for later pickup, along with stripping his virtually
destroyed 1/2 hardline and noisemaker antenna from the tower while we
had the crew up there.  RG-58 for duplexer connections?!  WTF???

Politically, I have to be a little careful here... I actually know the
ham that put this junk up, and if he reads this, I hope he's not too
offended -- but it's a nightmare waiting to happen for the rest of us on
the site.  It's so far from commercial grade it just shouldn't be up
there.  A backyard is a nice place for a repeater like that.

The above CRAP jobs are often why hams aren't welcome at commercial
sites.  I

[Repeater-Builder] Antenna suggestion question?

[T.J.]

Here is my dilemma.  One of my current work radio sites is being decommissioned 
and torn down.  My new replacement site has some antenna restrictions and I'm 
having trouble finding an antenna to fit the bill.  The old site is 110 ft. 
tall and I have a DB-264 antenna set for omni pattern at 6 dbd on the top now.  
The new site is 225 ft. tall but will not allow dipole antennas only fiberglass 
collinear antennas.  I normally use the Sinclair SC229 in this situation, but 
the site management says that is too tall and doesn't want that either.  They 
will only allow something up to 16 feet in hieght, give or take a little.  So 
I'm looking for something of high quality commercial grade and about maybe 3 to 
4 dbd gain, around 16 ft. tall or so.  I thought that there were these type 
antennas available as I've seen and used them before, but now I can't seem to 
find anyone that sells new ones.  All I can find are unity gain or the big ones 
like I already
 have.  Did the main antenna manufacturers stop making the in between size VHF 
collineer antennas?  If I'm just missing it for some reason, or losing my mind, 
can someone point me in the right direction.  

Thanks

Re: [Repeater-Builder] Cheap P25 repeater ...

[T.J.]

Ah and guess what Motorola has changed that yet again on the new Quantro's.  
Now the new Quantro's use the standard 100 watt internal PA throttled back to 
drive just one single high power PA to get up to 350 watts.  No more two 
external PA's on the Quantro's.

T.J. (KC8LTS) 


Re: Cheap P25 repeater ...
Posted by: Albert [EMAIL PROTECTED] ajbradio
Date: Mon Dec 31, 2007 1:09 am ((PST))

Needs to have the proper PA if you want it to operate properly.  Quantro PA's 
are different than the Quantar PA's and are more like an MSF 5000 PA in the 
final stage.  Quantro's usually just have a low power PA that is fed from the 
exciter.  This is then fed to the high power PA to get your final drive.  I've 
tried it in the past and it just doesn't work correctly.  What do you have 
right now for a Quantro and what is it missing?  Might have parts for you.

Al



Dan Blasberg wrote:

I agree, and on that note...  Does anyone know is a Quartro will work any 
external amplifier or does it need to be a motorola amp and tied into the 
Quantro?

Dan
KA8YPY

[Repeater-Builder] Needed: R-1801 suitcase adapters.

[T.J.]

I have some MSF 5000 repeaters that require the R-1801 suitcase programmer that 
I need to reprogram. I have the R-1801 and the MSF firmware, but I don't have 
the RTL-5817 adapter for the MSF proms. The RTL-5817 adapter for the MSF proms 
seems to have been misplaced or sprouted legs and walked off. Somehow I have 
acquired two RTL-5825 adapters (but I only need one), and a RTL-5818 adapter. 
Can anyone tell me if either of those adapters would work for the MSF 5000 
Proms? Or I would also be willing to sacrifice one of the RTL-5825 adapters to 
make it into the RTL-5817 adapter if anyone has the (schematic) info on doing 
that. Or I would trade for one if anyone has an extra RTL-5817 adapter. I also 
have the RTL-5805 adapter for the MX series proms, which I don't need anymore, 
because I got rid of all my MX series radios. If anyone is interested in that 
adapter for a trade please let me know.  I could also use one of the RTL-5815 
adapters for the SyntorX EEPROMs, but I don't need
 one like I do the one for the MSF.
 
 Thanks, T.J.
 
 PS also if anyone has a copy of the MSF programming manual I could use a copy. 
It's been years since I programmed the last Prom MSF 5K and the brain has 
forgotten the procedure for all the options on that program.

Re: [Repeater-Builder] repeater location fees

[T.J.]

It's very true that site prices can be widely different, especially depending on what you're putting up. At one time my work used to pay $1.00 a month for our main transmitter site. Then the old story of site management change came into play and they wanted more money of course. We are now paying a little over $4000.00 dollars a month for our main transmitter site downtown. Granted we do have our own air conditioned locked room, and five antennas on the building, including the highest spot on the tower that is on top of the building. Even with paying them all that money I still haven't convinced them to let me put up any Ham repeater antennas, but I'm still working on the new management. Maybe once they have been there a little while longer I'll be able to convince them.T.J.Doug Bade [EMAIL PROTECTED] wrote:  Anywhere from Free to cost of electric to $2000.00 a month.Locale is very influential It is extremely variable... I have sites of $25.00 a month for hams, and $950 a month for paging carriers 2 way systems.Major cities can easily double that depending on the site, rural areas can easily halve that. Electric may or may not be included..You need to be a lot more specific if you need a real answer.DougKD8BAt 04:48 PM 5/31/2006, you wrote:Does anyone know how much the average cost is for a repeater site onan existing tower?













  




  
  
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[Repeater-Builder] New group for interest in P25 format on ham radio

[T.J.]

With permission from Kevin, I'm letting the group know of a new group that I started for anyone that's interested in experimenting with new digital P25 format on ham radio. Discussion should be about any related use of this format on ham radio. Such as successes or problems that people are having or, how it is being put into use. Just follow the link belowto the group if you are interested.http://groups.yahoo.com/group/APCO25hamradioThanks T.J. (KC8LTS)Kevin Custer [EMAIL PROTECTED] wrote:  No Problem... You post it...T.J. wrote: Kevin, Iwas wondering if you could post this on the
 repeater builder yahoo group. I wanted to ask you first before just trying to post it.I started a group for the use of P25 digital mode on Ham radio.I thought some people on the reflectorwould be interested, and maybe you couldlet them know. http://groups.yahoo.com/group/APCO25hamradio  T.J. Molenkamp KC8LTS  Repeaters on:  146.500 +1 MHz NAC of 293 (C4FM P25 repeater)  442.175 +5 MHz PL of 123.0 (CMAN system, info at www.N8OBU.com)  927.4875 -25 MHz PL of 131.8













  




  
  
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RE: [Repeater-Builder] New group for interest in P25 format on ham radio

[T.J.]

No difference really, we're just using the same P25 open architecture digital audio format on the Ham radio frequencies that are being used in the commercial LMR world. Just exploring new formats and venturing into new territories in Ham radio.T.J.[EMAIL PROTECTED] wrote:  Ok, without subscribing to yet another remailer, what is 'Digital P25 format' ? I know what P25 or Project 25 is in the land mobile world. Is there a difference? Thank you, Neil - WA6KLA  Original Message From: [EMAIL PROTECTED]To: repeater-builder@yahoogroups.comSubject: RE: [Repeater-Builder] New group for interest in P25 formaton ham radioDate: Tue, 28 Mar 2006 17:17:45 -0800 (PST)With permission from Kevin, I'm letting the group know of a new
 groupthat I started for anyone that's interested in experimenting with newdigital P25 format on ham radio. Discussion should be about anyrelated use of this format on ham radio. Such as successes orproblems that people are having or, how it is being put into use. Just follow the link below to the group if you are interested.  http://groups.yahoo.com/group/APCO25hamradio  Thanks T.J. (KC8LTS)Kevin Custer <[EMAIL PROTECTED]>wrote: No Problem... You post it...T.J. wrote: Kevin, I was wondering if you could post this on therepeater builder yahoo group. I wanted to ask you first before justtrying to post it. I started a group for the use of P25 digital modeon Ham radio. I thought some people on the reflector would beinterested, and maybe you could let them know. http://groups.yahoo.com/group/APCO25hamradio   T.J.
 Molenkamp KC8LTS Repeaters on: 146.500 +1 MHz NAC of 293 (C4FM P25 repeater) 442.175 +5 MHz PL of 123.0 (CMAN system, info at www.N8OBU.com) 927.4875 -25 MHz PL of 131.8Yahoo! 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 use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/













  




  
  
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[Repeater-Builder] Phasing two DB-252's

[T.J.]

Does anyone know the formula for calculating the distance between two DB-252 corner reflectors that are connected by a phasing harness? I'm sure this is frequency dependent and I want to getthe spacing correct.Thanks T.J.   KC8LTS













  




  
  
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Re: [Repeater-Builder] Phasing two DB-252's

[T.J.]

I assume one wavelength from center to center correct?T.J. KC8LTSBob Dengler [EMAIL PROTECTED] wrote:  At 2/7/2006 09:18 AM, you wrote:Does anyone know the formula for calculating the distance between two DB-252 corner reflectors that are connected by a phasing harness? I'm sure this is frequency dependent and I want to get the spacing correct.I assume you're talking vertical separated corner reflectors aimed in the same direction.For maximum gain, 1 wavelength. You can reduce the spacing to ~0.8 wavelength to reduce nulls in the elevation pattern at the expense of maximum gain, IOW the main lobe gets "fatter" but the on-horizon gain drops a little.Bob NO6BYahoo! 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 use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/  













  




  
  
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Re: [Repeater-Builder] Phasing two DB-252's

[T.J.]

I assume one wavelength from center to center correct?T.J. KC8LTSBob Dengler [EMAIL PROTECTED] wrote:  At 2/7/2006 09:18 AM, you wrote:Does anyone know the formula for calculating the distance between two DB-252 corner reflectors that are connected by a phasing harness? I'm sure this is frequency dependent and I want to get the spacing correct.I assume you're talking vertical separated corner reflectors aimed in the same direction.For maximum gain, 1 wavelength. You can reduce the spacing to ~0.8 wavelength to reduce nulls in the elevation pattern at the expense of maximum gain, IOW the main lobe gets "fatter" but the on-horizon gain drops a little.Bob NO6BYahoo! 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 use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/  













  




  
  
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Re: [Repeater-Builder] Question Motorola Quantar VHF ?

[T.J.]

Yep, love it they work great, and I've got mine up and working on APCO 25 digitalfor those few that have newerdigital capable radios.ANTHONY [EMAIL PROTECTED] wrote:
Has anybody in this group play around with Motorola Quantar VHF Repeater Like it and the performance of it ? Regards ANTHONY W4NCR 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 use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/













  




  
  
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RE: [Repeater-Builder] voting receivers with simulcast transmitters

[T.J.]

And you are probably one ofthe only users left too.

T.J.JOHN MACKEY [EMAIL PROTECTED] wrote:
I think the name of the paging company is using this month is "Page USA", theyused to be called "MetroCall", before that they were "Telepage Northwest, aDivision of McCall Paging", before that they were "MCI Airsignal".For about 5 years they have been telling me that they will be dis-continuingmy analog paging service in about a year. About once a year they call me  tell me that they "have a great new pagingservice to transfer me to which will be exactly like what I have now onlybetter". I tell them "GREAT, as long as it operates on 150 MHz and providesvoice paging service I'll be happy to change". Then they tell me "yes, it isexactly the same except you will be operating on 900 Mhz and rather thanlisten to a small speaker on your pager you will read the messages on a LCDscreen on the pager". Then I say "Gee, that really isn't
 exactly what I havenow  would be a step down in quality". Then our discussion ends.-- Original Message --Received: Tue, 03 May 2005 03:59:50 PM CDTFrom: "Paul Finch" <[EMAIL PROTECTED]>To: Subject: RE: [Repeater-Builder] voting receivers with simulcast transmitters John,  What carrier is still letting you get away with analog pager??? All of the big guys have gone satellite links which don't pass analog audio, I don't like anything but terrestrial links, guess I am to worried about that service call to the satellite!!! The satellite link has it's place but you can't beat the terrestrial link system for dependability.  Paul  -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of JOHN MACKEY Sent: Tuesday, May 03, 2005 2:18
 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] voting receivers with simulcast transmitters   I know that here in Portland 158.700 MHz is STILL occasionally used for Simulcast analog/digital paging. I know the analog part is still working every time my pager goes beep.  I think I am just about the last person in town with a two-tone voice pager still receiving commercial service. I've had the same pager number for 20 years, but have been thru about 8 different pagers from Pageboy to up to Keynote!!  -- Original Message -- Received: Tue, 03 May 2005 08:00:37 AM CDT From: "Buley, Kenneth L \(GE Consumer  Industrial\)" <[EMAIL PROTECTED]> To:  Subject: RE: [Repeater-Builder] voting receivers with simulcasttransmitters 
-Original Message-  From: Repeater-Builder@yahoogroups.com  [mailto:[EMAIL PROTECTED] Behalf Of Neil McKie  Sent: Tuesday, May 03, 2005 8:48 AM  To: Repeater-Builder@yahoogroups.com  Subject: Re: [Repeater-Builder] voting receivers with simulcast  transmitters Daron,   At last report 152.24 MHz is still used by Arch paging but is  digital. You might contact Arch and ask if any analog paging is  still used in your area.   If you have trouble contacting them, please let me know.   Neil - WA6KLA   JOHN MACKEY wrote: Daron- Most all your 150 MHz or 900 MHz paging systems are going to be   simulcast. If
 there are any 150 MHz analog paging systems around,   try listening to them. -- Original Message --   Received: Tue, 03 May 2005 01:26:06 AM CDT   From: "Daron Wilson" <[EMAIL PROTECTED]>   To:    Subject: [Repeater-Builder] voting receivers with simulcasttransmitters  Hello Folks,   I'm looking over a radio study done by consultants for our small coastalcommunity. The recommendation includes three simulcast repeaterswithvoting receivers. We live on the coast, the terrain is covered with talltrees that make wonderful reflectors and contribute tons of multipath whenwet, and it rains plenty. I can't think of any place with
 terrain issueswhere I have seen a simulcast VHF repeater system built out.   If you have any references (for or against) a simulcast system like this,please drop me a note. I suspect a fair amount of multipath problems andnot real great audio for the mobile units based on their location,but Iwouldn't be able to prove it until the thing got installed.   Ideas?   Thanks,   [EMAIL PROTECTED]Daron-Original Message-From: Repeater-Builder@yahoogroups.com[mailto:[EMAIL PROTECTED] On
 Behalf Of Doug BadeSent: Friday, April 29, 2005 7:56 AMTo: Repeater-Builder@yahoogroups.comSubject: Re: [Repeater-Builder] I'm stunned...   It uses what looks like a JFET type VCO oscillator running with adc controlled/varicap pll on board. I used it to replace a 17.6125reference oscillator on a synthesized 900 station. The output is multiplied  in this case and used to sync lock a free running 70.45 RX L.O injectionoscillator and is the clock reference for the TX exciter PLL. I used anoutboard 10 mhz ovenized oscillator to 

[Repeater-Builder] Specs. for TX RX duplexer.

[T.J.]

What info, if any does anyone have on a TX RX Band pass cavity duplexer, model number 89-37-06-CM? It says on the label 144-174 Mhz, but I want to know the specs. The usual, loss and isolation and all that other fun stuff. The duplexer is made up of eight, four inch wide, fifteen inch tall,band pass cans. Four band pass cans transmit side, four band pass cans receive side, no notchs. Any info would be greatly appreciated.

Thanks, T.J.













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Re: [Repeater-Builder] Swapping TX and RX freqs

[T.J.]

Well they are not home brew, but I don't remember the model number off hand. I want to say it'sa Sinclair model, but I can't say for sure. I'll see if I can get over to the site to find out for sure what it is. I remember that it's made up of four eight inch wide cans, that stand aboutthree foot tall in a grey cabinent. I'll get some more info and check back later.

Thanks, T.J."Jim B." [EMAIL PROTECTED] wrote:
Kevin Custer wrote: My only caution was that *some* duplexers aren't created equal between  sides; therefore switching sides *may* not be possible. Motorola (and  others) made a few mobile duplexers that had more rejection on the  transmitter side, and simply switching them around wouldn't work  satisfactorily.  KevinAlso I have heard of a few duplexers (usually cheaper or homebrew ones) that had parts on the rx leg that could not handle any tx power at all, so swapping would likely blow up that leg.-- Jim BarbourWD8CHLYahoo! 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
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RE: [Repeater-Builder] Specs. for TX RX duplexer.

[T.J.]

Ok, I'll try giving them a call tomorrow. Thanks, T.J.Mathew Quaife [EMAIL PROTECTED] wrote:
Call and talk to Mary Brown, she is a sweetheart and very helpful. Mathew-Original Message-From: Repeater-Builder@yahoogroups.com[mailto:[EMAIL PROTECTED] On Behalf Of Mike PughSent: Thursday, April 14, 2005 5:40 PMTo: Repeater-Builder@yahoogroups.comSubject: Re: [Repeater-Builder] Specs. for TX RX duplexer.Did you try calling them and asking for tech support? I've got TXRX in all of my repeaters,and have found them excellent the help when asked.. Good luck! MikeT.J. wrote: I tried looking there already, it's not listed on there site. I believe  that it is an older unsupported model that they don't make any more.  That's why I resorted to asking here to see if any one has some old info  laying around on this duplexer.  T.J.
  Mike Pugh <[EMAIL PROTECTED]>wrote:   Full info can be found on their site.  takes you to their VHF cans page where all of the models are listed. Mike  T.J. wrote:   What info, if any does anyone have on a TX RX Band pass cavity duplexer,  model number 89-37-06-CM? It says on the label 144-174 Mhz, but I want  to know the specs. The usual, loss and isolation and all that other fun  stuff. The duplexer is made up of eight, four inch wide, fifteen inch  tall, band pass cans. Four band pass cans transmit side, four band pass  cans receive side, no notchs. Any info would be greatlyappreciated.   Thanks, T.J.   
  !  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 use of Yahoo! Groups is subject to the Yahoo! Terms of  Service . Yahoo! Groups Links    Yahoo! Groups Links  * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/  * To
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[Repeater-Builder] Swaping TX and RX freqs?

[T.J.]

I have a question for the group about flipping frequencies around on a repeater. I think I know the answer, but I want to make sure before I do or don't do anything. I'm going to swap around the transmit and receive frequencies on a repeater. What I was wondering was, can I just swap the transmit and receive linesbetween the duplexer and repeater, or does the duplexer have to be retuned for the new reversed transmit and receive frequencies?

Thanks for andinput that can be provided, T.J.













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Re: [Repeater-Builder] A Good 440 Anttena

[T.J.]

What does the list think of the 411 vs. the 413? I'm using the 408 now but I'm looking to cover into a one particular direction over the other.

T.J. 
KC8LTSChuck Kelsey [EMAIL PROTECTED] wrote:
I agree but lean toward the 408 over the 420.ChuckWB2EDV- Original Message - From: "Leon Ingerick" <[EMAIL PROTECTED]>To: <REPEATER-BUILDER@YAHOOGROUPS.COM>Sent: Monday, March 28, 2005 4:59 PMSubject: Re: [Repeater-Builder] A Good 440 Anttena  I would suggest the Decibel Products DB-408 or the DB-420 antenna.. I have two DB-420's and 11 DB-408 in service in the 440 band and they all work great.. They are all the 450-470 mhz model.. Put them up once and walk away..   Leon-N2HLT  http://www.expage.com/n2hlt   --- W8RIF <[EMAIL PROTECTED]>wrote:  I am looking for a good anttena for the 440 repeater. something with a lot  of gain. any ideas.  W8RIF
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Re: [Repeater-Builder] Help needed if possible, making spectra's into a repeater

[T.J.]

I would not use a spectra as a receiver to a repeater. I tried this and found that the spectra has an inherent bounce to the COR drop. Itmakes for some pretty bad kerchunks and squelch tails at the end of transmissions. The high power spectra's do work OK for a transmitter. As long as you run it down at least to half power and put a good high flow fan on the PA heat sink.

T.J.[EMAIL PROTECTED] wrote:


I have a few of the trunk mount and dash mount spectra's. I have a few 100 watt units and a few of the 45 watt versions. I am curious about how to hook these mobiles to a Zetron Model 37 max controller to make a repeater.I am not even sure it is possible. But any help would be needed. I have a service manual for the spectra's but I am not the engineer. Does anyone have a pin out for the COR and other audio pins that need to be connected to the controller.I have hooked up maxtrac's this way with no trouble. I have just not been able to get it at all with the spectra's Any comments would be good and help is needed Thanks.

Joe 













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Re: [Repeater-Builder] VHF repeater amp

[T.J.]

I have a 100 watt micor continuous duty amp. You would have to turn down your input power to .5 watts though as that's all it takes as input. Of course I would like to get rid of the rest of the repeater too along with it. Who knows maybe I can get more for it piece by piece.

T.J.Kevin Bednar [EMAIL PROTECTED] wrote:


Anyone have any 2 mtr PA's they might be looking to sell? I'm looking for something that will take between 5 and 25 watts in and put out between 80 and 100 watts. TIA to all.
Kevin K2KMB 













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[Repeater-Builder] RG 9 and RG 55

[T.J.]

Anyone have any specs and or opinionson RG 9 and RG 55 coax? I came across a repeater that has RG 55 for interconnections between the duplexer cans, and RG 9 between the transmitterand duplexer, receiver and duplexer, and duplexer and antenna. I had never seen these coax before, and wondered abouttheir specs and capability in duplex service.

T.J.













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Re: [Repeater-Builder] MSF 5000 key up delay problem (now strobe light interference)

[T.J.]

Thanks Neil, that was exactly the problem. The Spectra-Tac delay was set to 1500 msec. I guess my second counting was a little fast, as it was only about a second and a half in reality. I set the delay to zero for now until I can locate a non Spectra-Tac codeplug, and all seems to be working good for now. Well except for the interference I'm getting from the strobe light on the mast that the antenna is on. When I shut off the strobe light off all the noise goes away. Just something else to work on I guess. 

Anyone have any experience with strobe light interference? Any solutions?

T.J.nj902 [EMAIL PROTECTED] wrote:
--- In Repeater-Builder@yahoogroups.com, "T.J." <[EMAIL PROTECTED]>wrote:"I'm looking to see if any one on the list that runs an MSF 5000 hasexperienced this problem. When I key up this VHF MSF and startcounting, the repeater doesn't key up and start retransmitting untillI get to four. So there is about a good two second delay to repeaterkey up..."_One possible cause of that behavior would be if your station was everset up for use with a Motorola Spectra-TAC voting system. In suchsystems the normal repeat audio path is through the voting comparatorand back to the station through the wire-line.A station that is set up for Spectra-TAC and is also set up as arepeater has a mode called "in-cabinet repeat". Basically whathappens is that when the receiver unsquelches, the
 controller expectsto receive a line key command from the voting comparator. If thatnever comes - the station will eventually key up and repeat"in-cabinet". That would exactly account for what you are seeing.If your station does have Spectra-TAC enabled, it would be preferablefor you to load a conventional non Spectra-TAC codeplug, however youcould go to the "Edit Advanced Information" page three and try settingthe "S-Tac Clear Repeater Delay" parameter to zero.You can tell if your station has Spectra-TAC enabled by going to theF8 Station Model / Options screen in F4 Change / View.













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[Repeater-Builder] MSF 5000 key up delay problem

[T.J.]

I'm looking to see if any one on the list that runs an MSF 5000 has experienced this problem. When I key up this VHF MSF and start counting, the repeater doesn't key up and start retransmitting untill I get to four. So there is about a good two second delay to repeater key up. When I hook up the test set the receive audio comes out the local speaker with no delay. The repeater keys up instantly with the local PTT switch. If the repeater is still keyed up during the hang time and you key back up again the audio comes through with no delay. As soon as you let the hang time expire it takes two full seconds of an incoming signal to get it to key up again. I've gone through all the delay setting in the RSS and set them to zero. I also tried setting everything back to default, and neither of these actions made any difference. If anyone has any ideas on what this could be I would very much appreciate it.

Thanks, T.J. 
73













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Re: [Repeater-Builder] ten meter repeater setups

[T.J.]

Yea, even in the same band. UHF repeater with a UHF remote base. The repeater is on 442 withtheremote baseon 444. It's linking to another repeater about seventy miles away. We let each repeater ID on it's own. The repeater TX PL tones are COS operated so that the PL tone is only transmitted when some one is talking plus a short hang time. That way at the other end through the remotethe only time you hear the ID from the other repeater is if it's IDing over or while someone is talking.

T.J.
Just out of curiosity and because it's more on-topic - how many people have RB's of some sort on their repeater systems on the list, and to which band(s)?Nate WY0X













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[Repeater-Builder] Mobile Duplexer Question

[T.J.]

Iacquireda Phelps Dodge 636 3/3 mobile duplexer tuned for TX freq. of 163.8xxx and a RX freq. of 167.5xxx. What I was wondering was if this could be tuned down into the ham band with any success for a mobile repeater using some hand held radios. I was looking in my Tessco catalog and saw that this unit resembles the RFS Celwave 636-6A-3/3 with specifications of: Freq. range 164-174 Mhz, max power 50 watts, min. separation 4.5 Mhz, insertion loss 1.2 db, isolation 80 db both TX and RX. I then looked at the the RFS Celwave 636-6A-1/3, which is exactly the same aappearanceand specs. except for the freq. range, which is 144-154 Mhz.That made me question, are these duplexers the same onlytuned from the factory differently giving it the slightly different model number. Or are they completely different inside and not worth the trouble of retuning. The tuning rod are sticking out a good ways, about an inch. So maybe there
 is some room for adjustment. If anyone has messed around with a ssimilarunit or has any info on this unit and could share their stories of success or other wise (if I should just toss it as useless junk) I would greatly appreciate the info. 

Thanks for all the good info on this list, T.J.

73 KC8LTS













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Re: [Repeater-Builder] Voters - STATUS TONE

[T.J.]

With all the talk of voters I thought I might as well throw in my voter question. I was wondering if anyone knows if themotorola Digi-Tac comparitor also has a cor input line asit was said that theSpectra-Tac did. I have a Digi-Tac here with abad power supply board I would like to put into use. It was used with the dedicated phone lines and is set up for 2175 status tone right now. I would like to do rf links and use cor to show activity, but didn't know if it was possible. If it is then it might be worth my fixing the power supply in this unit.
T.J.
James [EMAIL PROTECTED] wrote:
If it is a Motorola spectra tac unit, it SHOULD be run with the status tone. The status tone sets the AGC so that all the receivers are at the same level coming in.Jamey Wright wrote:That way I don't have to do any major mods to the voter. I prefer to run itthe way it was intended.Jamey Wright-Original Message-From: John Sichert [mailto:[EMAIL PROTECTED]Sent: Tuesday, September 14, 2004 7:25 PMTo: Repeater-Builder@yahoogroups.comSubject: Re: [Repeater-Builder] VotersJamey,If you did read through that thread, why would you still be using statustone to indicate a COR signal?John  Yahoo! Groups
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Re: [Repeater-Builder] Dual Band Antenna's?

[T.J.]

You could try this antenna. http://www.decibelproducts.com/productnotebookantenna2.asp?Param=ModelNumberModel=DB314-Afreq=on We used this antenna at my work for our interoperability initiative. You won't like the price though as it was over $1000.
73
[EMAIL PROTECTED] wrote:
I'm sure this has been discussed before but what are your thoughts about a good quality base station dual band (2/440) antenna's? I know I can get the Diamond / Comet but was woundering if there's anything out there in the commercial world.Thanks..Yahoo! Groups LinksTo 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 use of Yahoo! Groups is subject to:http://docs.yahoo.com/info/terms/ 










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