Re: Win10 CDM/HT Out of Band and Region Code Mods
One of the 6 meter repeater groups in SoCal has all of the hardware mods figured out for moving the CDM1250 low band up to 54 MHz with no degradation but they don't want it put out on the net for an unknown reason which I didn't push them on since they provided me the mods in person during a visit last year.
?
while driving thru LA last summer I dropped by a hams QTH and we did the mod to my CDM1250 for 6 meters on the spot so the documentation was not supplied to me.
?
As mentioned I had my cdm1250 6 meter modified on site and it works across 39 to 54 MHz with minimal Sens loss and 70 watts output on all of 6 meters.
?
I use it for CHP receive and 6 meter use while driving thru SoCal from my Oregon QTH to My Prescott AZ Qth and the radio works very well.
?
I just picked up a HT1250 tlast fall and I used the waris Python code which we used on my CDM1250 mobile to get OOB up to 54 MHz on both of my radios.
?
My Ht1250 works all the way up to 54 MHz without any mods and any sensitivity losses and 6.5 watts output.
|
Re: Running a Repeater on a FM Broadcast Tower
People have mentioned isolator and circulator any brand better than the other?? ?
?
If I remember correctly.? ?The isolator are used on the TX and RX side of the repeater ports to the duplexer?
?
The circulator is used after it combines on the duplexer output to go up the antenna?
?
Also it was stated to bring a watt meter to look for potential RF energy coming down the cable.? ? I'm assuming you'll want too look for the RF on the repeater frequency or the radio station frequency?? ?What do you do if you find such a issue??
?
Appreciate everyone help on.? Lot's of good information.
?
Thanks
Steven H
N8RLW?
?
?
|
Re: fs: AnritsuSitemaster S331l
Robert
How about $1,000.00 plus shipping?
?
Regards,
?
Charles F. Adams
Industrial Communications Co.
121 N Sitgreaves Street
Easton, PA 18042
Office 610-253-1214
Cell 610-360-0050
Fax 610-253-4504
?
toggle quoted message
Show quoted text
From: repeater-builder@groups.io <repeater-builder@groups.io>
On Behalf Of Charles Adams via groups.io
Sent: Friday, March 14, 2025 10:32 AM
To: repeater-builder@groups.io
Subject: Re: [repeater-builder] fs: AnritsuSitemaster S331l
?
Industrial Communications Co.
Yes, they are selling for more than I'm asking on ebay plus shipping. I have to pay for my quantar I just bought from sunny communications or the anritsu andnmy other gear wouldn't be up for sale. I also have other stuff for sale not listed here as it's
broadcast related and has nothing to do with lmr or repeaters. I will also have a Kenwood 851 coming for sale? when it gets replaced with the quantar as well as a micromagic 150W reject only duplexer. If i can sell this other equipment and make back what im
out of pocket for these upgrades then the Kenwood will be donated to the local ham club for a mobile command / site repeater. The local ham guy in charge of ares wants to incorporate gmrs into ares and the local EM plan. I'm trying to make that main repeater
the best it can be and spared no expense. I'm on a fixed income and the fmrs repeater trustee and it's not under a 501c so I can't accept tax free donations I'm doing this entirely on my own and out of my own pocket and how I do that is buying and selling
to support the repeater stuff.
Thanks
Robert
?
This is the same one you paid 600 for a few months ago?
?
Matt
AL0R
?
From:
repeater-builder@groups.io <repeater-builder@groups.io>
On Behalf Of Part 15 Engineer via
Sent: Tuesday, March 11, 2025 07:27
To: repeater-builder@groups.io
Subject: [repeater-builder] fs: AnritsuSitemaster S331l
?
Is there any interest among the braintrust for an Anritsu Sitemaster S331l Advanced cable and antenna system analyzer? $1300 shipped conus ups ground insured.
Located in Scottbluff NE 69361
Local pickup and cash or PayPal for shipping.
|
Re: fs: AnritsuSitemaster S331l
AzaszzzZzzzzx a szzzzzzzazaazwaqaZzzzzzzz ZZZ asaqzzawzz. Z z.? Z zzzzzzzazaz da
Charles Adams
Industrial Communications Co.d
Mobile 610-360-0050?
Office 610-253-1214?
cadams@...
toggle quoted message
Show quoted text
From: repeater-builder@groups.io <repeater-builder@groups.io> on behalf of Part 15 Engineer via groups.io <kc8gpd@...>
Sent: Tuesday, March 11, 2025 8:35:18 AM
To: repeater-builder@groups.io <repeater-builder@groups.io>
Subject: Re: [repeater-builder] fs: AnritsuSitemaster S331l
?
Re: anritsu: only accessories included are the power supply / charger and carry case. Osl and calibration cable are easily available on ebay. The person I bought this from never sent the accessories and it's been afew moths so I suspect I will
not be seeing any accessories but if the osl and calibration cable should arrive I will forward to buyer free of charge.
Thanks
Robert
Is there any interest among the braintrust for an Anritsu Sitemaster S331l Advanced cable and antenna system analyzer? $1300 shipped conus ups ground insured.
Specs and info...
Located in Scottbluff NE 69361
Local pickup and cash or PayPal for shipping.
|
Re: fs: AnritsuSitemaster S331l
3qqqqdqaa21
Charles Adams
Industrial Communications Co.
Mobile 610-360-0050?
Office 610-253-1214?
cadams@...
toggle quoted message
Show quoted text
From: repeater-builder@groups.io <repeater-builder@groups.io> on behalf of Part 15 Engineer via groups.io <kc8gpd@...>
Sent: Tuesday, March 11, 2025 9:17:03 AM
To: repeater-builder@groups.io <repeater-builder@groups.io>
Subject: Re: [repeater-builder] fs: AnritsuSitemaster S331l
?
Yes, they are selling for more than I'm asking on ebay plus shipping. I have to pay for my quantar I just bought from sunny communications or the anritsu andnmy other gear wouldn't be up for sale. I also have other stuff for sale not listed here
as it's broadcast related and has nothing to do with lmr or repeaters. I will also have a Kenwood 851 coming for sale? when it gets replaced with the quantar as well as a micromagic 150W reject only duplexer. If i can sell this other equipment and make back
what im out of pocket for these upgrades then the Kenwood will be donated to the local ham club for a mobile command / site repeater. The local ham guy in charge of ares wants to incorporate gmrs into ares and the local EM plan. I'm trying to make that main
repeater the best it can be and spared no expense. I'm on a fixed income and the fmrs repeater trustee and it's not under a 501c so I can't accept tax free donations I'm doing this entirely on my own and out of my own pocket and how I do that is buying and
selling to support the repeater stuff.
Thanks
Robert
This is the same one you paid 600 for a few months ago?
?
Matt
AL0R
?
From:
repeater-builder@groups.io <repeater-builder@groups.io>
On Behalf Of Part 15 Engineer via
Sent: Tuesday, March 11, 2025 07:27
To:
repeater-builder@groups.io
Subject: [repeater-builder] fs: AnritsuSitemaster S331l
?
Is there any interest among the braintrust for an Anritsu Sitemaster S331l Advanced cable and antenna system analyzer? $1300 shipped conus ups ground insured.
Located in Scottbluff NE 69361
Local pickup and cash or PayPal for shipping.
|
Re: Running a Repeater on a FM Broadcast Tower
Pre 1992.. before I left Detroit, one Amateur placed a 440 repeater on the side of an FM tower.. Antenna wise, He installed a pair of 4 (maybe 8) bay stacked dipoles in cardiod pattern? opposite sides of the tower..
Think of it as a cardiod pattern East and a cardiod pattern West.. totally omnidirectional except for a slight theoretical notch in the pattern North and South.
?
It had tremendous coverage, but Detroit is pretty flat..? with elevation variation of only 75 feet in 3-4 counties.
|
Re: Motorola R2600 VGA Output
On 2025-03-13 11:44 p.m., k9wkj via groups.io wrote: Ramesh
the V196WL is plug and go <-- Thanks, Wayne.? Hope I can get my hands on one! - the AL1716W did not pan out.? (I did test the monitor with a desktop computer and confirmed that the monitor does work... and was able to get the OSD menu top pop up [which only activates when there's a valid video signal, but there is no option to change display resolution]). Appreciate your time and guidance. Ramesh, VA3UV, WA3UV
|
Re: MTR2000 PL Decode question
Hi
Can you please share the places of the configs ??
Take care
73s ct2gnh - Paulo Lobo
All,
To let everyone know what I figured out (and aid others), there are TWO
places you have to set the radio to full duplex if you have a wireline
card installed, there's the settings on station config *AND* on the
wireline config.? It will do exactly as it was doing if the radio is set
to full duplex but wireline is set to half duplex.
Thanks
--Don
On 3/11/25 18:43, Don Wisdom KD7WKF via wrote:
> Sure, Ill email it too you directly now however its not working again :(
>
>
> On 3/11/25 18:40, dsay2001 via wrote:
>> I'm starting to work on a similar setup...would you be willing to
>> share the codeplug file?
>>
>> Don
>>
>> On Tue, Mar 11, 2025, 5:18 PM Don Wisdom KD7WKF via
>> <http:// > <dwisdom-lists=wiztech.biz@groups.io
>> <mailto:wiztech.biz@groups.io>> wrote:
>>
>> ??? All,
>>
>> ??? I redid the codeplug from scratch and off it went!
>>
>> ??? Thanks!
>>
>> ??? --Don
>>
>>
>> ??? On 3/11/25 17:50, Don Wisdom KD7WKF via <>
>> ??? wrote:
>> ???? > Chris,
>> ???? >
>> ???? > other thing too, I looked at the station operation controls and
>> ??? briefly
>> ???? > rx mode says active then switches back to inactive.
>> ???? >
>> ???? > Thanks
>> ???? >
>> ???? > --Don
>> ???? >
>> ???? >
>> ???? > On 3/11/25 17:14, Don Wisdom KD7WKF via <http://
>> ??? > wrote:
>> ???? >> Hi Chris,
>> ???? >>
>> ???? >> The USB-RIM is set to use an active high signal for both COS and
>> ???? >> CTCSS. ??I have the PL line set in the wildcard however I just
>> ??? noticed
>> ???? >> that there isnt a output for pin C2 in the output group
>> settings.
>> ???? >> There is an output for pin C4.
>> ???? >>
>> ???? >> Other thing the wildcard checkbox is greyed out on the system
>> ???? >> configuration screen.
>> ???? >>
>> ???? >> Thanks
>> ???? >>
>> ???? >> --Don
>> ???? >>
>> ???? >>
>> ???? >> On 3/11/25 04:37, Chris Boone WB5ITT via <http://
>> ??? > wrote:
>> ???? >>> Wildcard programmed in the MTR? I take it you're using a
>> ??? transistor
>> ???? >>> inverter to talk to the USB which normally requires a low going
>> ??? signal?
>> ???? >>>
>> ???? >>> Chris WB5ITT
>> ???? >>>
>> ???? >>>
>> ???? >>> On Mon, Mar 10, 2025, 7:48 PM Don Wisdom KD7WKF via
>> ??? <>
>> ???? >>> <http:// <>> <dwisdom-
>> ??? lists=wiztech.biz@groups.io <mailto:wiztech.biz@groups.io>
>> ???? >>> <mailto:wiztech.biz@groups.io <mailto:wiztech.biz@groups.io>>>
>> ??? wrote:
>> ???? >>>
>> ???? >>> ??? All,
>> ???? >>>
>> ???? >>> ??? I have a MTR2000 here that I have interfaced to a USB-RIM
>> ??? module, I
>> ???? >>> ??? have
>> ???? >>> ??? it working in COS mode but want to run a ctcss code on it.
>> ???? >>>
>> ???? >>> ??? I was curious does anyone know if anything special needs
>> to be
>> ???? >>> set for
>> ???? >>> ??? the ctcss valid pin to go high to tell the RIM that the
>> ??? correct PL/
>> ???? >>> ??? ctcss
>> ???? >>> ??? is valid?? I cant get the ctcss lead to go high to tell the
>> ??? RIM that
>> ???? >>> ??? there's a valid ctcss code.? When I key up my handheld with
>> ??? the
>> ???? >>> correct
>> ???? >>> ??? ctcss code on it it initially says keyed under the signal
>> ??? status.
>> ???? >>>
>> ???? >>> ??? Ive tried several mixtures of settings.
>> ???? >>>
>> ???? >>> ??? Under Audio I have Analog RX Activation set to PL
>> ???? >>>
>> ???? >>> ??? Under channel info I have decoder set to RX PL of 67.0
>> ???? >>>
>> ???? >>> ??? I am using the ICS-CTRL MTR2000 Adapter board that goes to
>> ??? a DB9.
>> ???? >>> Its
>> ???? >>> ??? pulling from C2 for PL Detect & B4 for COR.
>> ???? >>>
>> ???? >>> ??? Thanks!
>> ???? >>>
>> ???? >>> ??? --Don
>> ???? >>>
>> ???? >>>
>> ???? >>>
>> ???? >>>
>> ???? >>>
>> ???? >>>
>> ???? >>>
>> ???? >>>
>> ???? >>>
>> ------------------------------------------------------------------------
>> ???? >>>
>> ???? >>> This email has been scanned for spam and viruses by Proofpoint
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>> ???? >> This email has been scanned for spam and viruses by Proofpoint
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>> ???? >>
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>> mod_id=11&mod_option=logitem&report=1&type=easyspam&k=k1&payload=53616c7465645f5f6725180200ff49e6d753862a952d3867fbc6f5fe2e9e45705148e8e30859920fde9ceff2211e585aaf2265ab029c0d0b40090765fef6ae20dc2d4bdcd027f592db12b9b429de9de779b55cf175a013dfe33f0015ad9bc8b7ad9583f0810356fa3797bf5ce12a4a46631b36bda83b988d84421fc44e088725e2d167c92a1c677e909d7499a35e542e0d72793b2f5c9dfe84ebda61eba7d88a
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>>
>> This email has been scanned for spam and viruses by Proofpoint
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>> mod_id=11&mod_option=logitem&report=1&type=easyspam&k=k1&payload=53616c7465645f5fee34ff1a185c1d35060d41d9e67985d4ae98901ed6bbeeb13416feec750e1dca4256c6e581eb51fb6e812ec19c124f543296b38ad13df1c0f78a4d3db07e5b43a18bc0d2b8dd326d45d36a4c07ad46ece63c6acd3909dab3f41b9f44dd331933fcf71c3405ee9a27e78d1b510db6acd1944de2b04b0960a785665afc0097d15e4be3048d03c8da6718c6a412ea49b255e2644e5b3fe1e5a4>
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|
Re: Win10 CDM/HT Out of Band and Region Code Mods
Sounds good. Whenever I get a chance, I'll get something typed up and send it to you. Might be a little bit, my kids have a lot of school activities and they're keeping me pretty busy at the moment. I just wanted to share with yall where I found things on my Windows 10 machine to do the CPS mods.
?
Terry KM5UQ
|
Re: Win10 CDM/HT Out of Band and Region Code Mods
Repeater-builder does not have the region code mod for CDMs.?
If you will send it to me I'll post it.
?
The CDM Notes page at Reepater-Builder has a couple of 200 MHz CDM
to 222-225 MHz conversion articles.
?
You DO NOT need to hexedit the CPS.?
The process described will enable a 42-50 CDM to be programmed to 46-54 MHz.
Then you will run into the design range of the front end and driver-final tuned circuits.?
They will need to be changed to go much higher.
?
I personally do not have any hands-on experience with low band CDMs but the
people I've talked to say that you won't get much over 52 MHz.
?
Mike WA6ILQ
?
|
Re: Motorola R2600 VGA Output
Ramesh? ??
the V196WL is plug and go??
|
Re: Running a Repeater on a FM Broadcast Tower
I've worked at several "high power" sites in the past. I would suggest that you bring a wattmeter and dummy load to the site. Connect the wattmeter with a dummy load to the antenna feedline and you may be amazed at how much power can come down the coax. This power may not cause interference but might cause damage to your equipment.
73, Joe, K1ike
toggle quoted message
Show quoted text
On 3/13/2025 11:17 AM, Kevin Berlen via groups.io wrote: I had to install a FM trap on the repeater feedline to reduce the amount of RF getting into the system from the FM stations. We have about 250ft vertical separation between the broadcast array and the repeater antenna.
|
Re: Reality check on capabilities of GRMS repeater
Very true.. I once had a repeater site that was free and had a PBX phone line available but the noise was horrible. The receiver on the bench was hearing 0.2 microvolts. At the site hooked to the Hustler G7 antenna, the effective sensitivity was over five microvolts! Needless to say the range kind of sucked.. ironically the noise was gone at 220 and the control receiver which was on a quarter wave ground plane had better coverage than the 2 m input.. Spectrum analyzer test confirmed it Plans were made to move the repeater to an FM tower about 3 mi north.. It involved myself and K5PFE climbing the tower on a hot Sunday at August afternoon and replacing the DB224C elements with 150 MHz A elements. This was to allow the FM station RPU receivers at 161 megahertz and the 2 m repeater to share the same antenna.. which it did beautifully. The coverage got to the point to where handhelds could get in where 25 watt mobiles were noisy before.?
All that was lost in a fire at the transmitter site in January of 1989... Luckily the RC850 was not at the site, the backup repeater was in use at the time. Unfortunately the duplexers had been borrowed from a friend of mine, and I had to give him my WP-641s as a replacement.?
Ironically 30 years later I bought the duplexers back from him and they have been back on the air on my 146.94 repeater at a LPTV tower site at 475ft with a DB228 since 2014
Chris WB5ITT?
Putting a bow on the final installation by performing a sensitivity test with antenna vs a load and measuring any desense is very important. It doesn’t matter how well the repeater system works on a bench, you need the equipment and knowledge on how to perform final testing as duplexers can detune during shipment. Otherwise the installed repeater can be operating at many dB below what you think or saw on a test bench. If you don’t have access to a service monitor it can get very expensive hiring someone to perform testing and touch up tuning on site.
“All the rest of the tasks of building a repeater out of mobiles still exist: Duplexer tuning, Radio programming, Radio interconnect cabling, etc. and those are the more complicated tasks.”
|
Re: Running a Repeater on a FM Broadcast Tower
At 3/13/2025 02:32 PM, you wrote:
Split antennas and a circulator
would have fixed the problem..
Nope: my 440 system already had separate TX & RX antennas vertically
separated 60'.? Circulators on everything.
The source points of the 2A - B mix were numerous joints throughout the
tower.? Painting them over with conductive paint did reduce the mix
levels to below most RX noise floors for a couple of months, but would
return thereafter.
Bob NO6B
|
Re: Running a Repeater on a FM Broadcast Tower
At 3/13/2025 01:25 PM, you wrote:
On Thu, Mar 13, 2025 at 12:39
PM, Jim Barbour wrote:
- -->Look for another FM station 5 MHz away (88.7 or 98.7)...if
there's
- none within 15-20 miles, you're probably ok...
Oh Lord....??? many, many years ago a new ham
repeater was coordinated on
147.21 at a local MAJOR site.? Nobody knew that there was a paging
system
on 152.21...? and that particular system was not very active... But
when both
were on the air simultaneously the mix trashed EVERY UHF repeater.
(well,
the 470-476? and 506-512 systems were not affected)
?
The public safety people were NOT happy.?? Emphasis on the
NOT.?
Neither were the various commercial UHF repeater owners.?
There was no easy solution.? The final fix was that the ham system
ended up
running "upside down" (147.21 in, 147.81 out) for the next
30-35 years (until
the 152.21 paging system shut down).
Timing was different from how you state Mike: the 2 meter system was
originally on 147.81, then got flipped to 147.21, perhaps to align with
the area bandplan.? I think the paging TX came sometime later,
because the 2A - B mix didn't start with the 81/21 flip.? The paging
TX was not a high power TX as it was meant to fill coverage gaps, not to
provide primary coverage.? The problem remained until the 152.21
paging TX was decommissioned.
Bob NO6B
|
Re: Running a Repeater on a FM Broadcast Tower
Commercial systems cannot operate on a non-standard split. It's mandated in part 90?
Chris WB5ITT?
A site I used to maintain had a Class A FM on 105.5, and a 250W FX on 100.5, with the same programming. It was in an industrial area with about 6 low profile 450mHz business repeaters near by. That caused all sorts of problems. We finally proved to two different land-mobile shops that the FM's were clean, as the problem signals didn't exist until their own repeater TX was added into the mix. Of course they were all using mobile style reject only duplexers. I suggested they coordinate non standard repeater pairs, but not sure if that was a viable option for them or not. Have not heard from any of them in several years.
On Thu, Mar 13, 2025 at 12:39 PM, Jim Barbour wrote:
-->Look for another FM station 5 MHz away (88.7 or 98.7)...if there's
none within 15-20 miles, you're probably ok...
Oh Lord....??? many, many years ago a new ham repeater was coordinated on
147.21 at a local MAJOR site.? Nobody knew that there was a paging system
on 152.21...? and that particular system was not very active... But when both
were on the air simultaneously the mix trashed EVERY UHF repeater. (well,
the 470-476? and 506-512 systems were not affected)
?
The public safety people were NOT happy. ? Emphasis on the NOT.?
Neither were the various commercial UHF repeater owners.?
There was no easy solution.? The final fix was that the ham system ended up
running "upside down" (147.21 in, 147.81 out) for the next 30-35 years (until
the 152.21 paging system shut down).
?
Mike WA6ILQ
?
|
Re: Running a Repeater on a FM Broadcast Tower
Split antennas and a circulator would have fixed the problem.. or change in frequency too?
Chris WB5ITT?
On Thu, Mar 13, 2025 at 12:39 PM, Jim Barbour wrote:
-->Look for another FM station 5 MHz away (88.7 or 98.7)...if there's
none within 15-20 miles, you're probably ok...
Oh Lord....??? many, many years ago a new ham repeater was coordinated on
147.21 at a local MAJOR site.? Nobody knew that there was a paging system
on 152.21...? and that particular system was not very active... But when both
were on the air simultaneously the mix trashed EVERY UHF repeater. (well,
the 470-476? and 506-512 systems were not affected)
?
The public safety people were NOT happy. ? Emphasis on the NOT.?
Neither were the various commercial UHF repeater owners.?
There was no easy solution.? The final fix was that the ham system ended up
running "upside down" (147.21 in, 147.81 out) for the next 30-35 years (until
the 152.21 paging system shut down).
?
Mike WA6ILQ
?
|
Re: Running a Repeater on a FM Broadcast Tower
My old club has two repeaters at a cable company tower. The repeaters are 1VHF and 1UHF. There is a low power local access TV transmitter in there and two radio stations transmitters in there When the radio stations came in there after us one of them caused interference on our UHF repeater. When it was brought to their engineers attention he ordered a notch filter and it was added to the UHF repeater and that took care of it.
Les Keegan? N4LPK?
On Thursday, March 13, 2025 at 10:48:59 AM EDT, steven harvey <sharvey@...> wrote:
Hello Group,
?
I'm in the investigation stage of relocating a repeater to a FM broadcast tower site.??? I've been on several LMR towers and not had any issues but wanted to see if there is any best practices I could learn from on what equipment should be mandatory for being on a FM broadcast tower site.??? I have listed what I have so far.? Any additional equipment please
?
1. The repeater will be on the UHF spectrum of the ham radio side.
2. It will be running a Kenwood NXR-1800K2 repeater with TXRX duplexers with a 100DB isolation between sides.
3.? Height will be between 350 to 400 ft
5. Cable is 1 5/8" hard line that was run but never used and capped off.
4. Antenna will be a commander technologies fiberglass antenna being side mounted on the tower with polyphaser lightening protection attached and grounded.
4a.? Jumpers will be 1/2 hardline between the antenna and 1 5/8" and the same going into the building.
5.? The radio station broadcast on 93.7 a with a ERP of 37,000 Watts and there antenna is at the 550ft mark.
6.? There only two 800Mhz commercial antenna's on the tower and a couple of Wifi provider dishes.?? I'll be above all of that equipment.
?
Thanks!
Steven H.
N8RLW
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Re: Running a Repeater on a FM Broadcast Tower
A site I used to maintain had a Class A FM on 105.5, and a 250W FX on 100.5, with the same programming. It was in an industrial area with about 6 low profile 450mHz business repeaters near by. That caused all sorts of problems. We finally proved to two different land-mobile shops that the FM's were clean, as the problem signals didn't exist until their own repeater TX was added into the mix. Of course they were all using mobile style reject only duplexers. I suggested they coordinate non standard repeater pairs, but not sure if that was a viable option for them or not. Have not heard from any of them in several years.
On Thu, Mar 13, 2025 at 12:39 PM, Jim Barbour wrote:
-->Look for another FM station 5 MHz away (88.7 or 98.7)...if there's
none within 15-20 miles, you're probably ok...
Oh Lord....??? many, many years ago a new ham repeater was coordinated on
147.21 at a local MAJOR site.? Nobody knew that there was a paging system
on 152.21...? and that particular system was not very active... But when both
were on the air simultaneously the mix trashed EVERY UHF repeater. (well,
the 470-476? and 506-512 systems were not affected)
?
The public safety people were NOT happy. ? Emphasis on the NOT.?
Neither were the various commercial UHF repeater owners.?
There was no easy solution.? The final fix was that the ham system ended up
running "upside down" (147.21 in, 147.81 out) for the next 30-35 years (until
the 152.21 paging system shut down).
?
Mike WA6ILQ
?
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Re: Running a Repeater on a FM Broadcast Tower
On Thu, Mar 13, 2025 at 12:39 PM, Jim Barbour wrote:
-->Look for another FM station 5 MHz away (88.7 or 98.7)...if there's
none within 15-20 miles, you're probably ok...
Oh Lord....??? many, many years ago a new ham repeater was coordinated on
147.21 at a local MAJOR site.? Nobody knew that there was a paging system
on 152.21...? and that particular system was not very active... But when both
were on the air simultaneously the mix trashed EVERY UHF repeater. (well,
the 470-476? and 506-512 systems were not affected)
?
The public safety people were NOT happy. ? Emphasis on the NOT.?
Neither were the various commercial UHF repeater owners.?
There was no easy solution.? The final fix was that the ham system ended up
running "upside down" (147.21 in, 147.81 out) for the next 30-35 years (until
the 152.21 paging system shut down).
?
Mike WA6ILQ
?
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Larry Macionski
terry dalpoas
Chris Boone WB5ITT