FS: MTR2000 Repeater Interface PC Board
I have 2 unpopulated PC boards from Sierra Radio used to interface with a MTR2000.? The connectors are not soldered to the board yet.
I don't have a schematic or parts list available for the PC board.? Sierra Radio should be able to supply this?
$29.00 including Priority Mail shipping.
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These are 100% totally overboard for a home.
Use a 2" pvc conduit sleeve (or large enough to pass your current
and future needs) through the wall of you home.
73, Jim W7RY
On 11/24/2022 11:31 AM, Dan Woodie
wrote:
Don't ever use that garbage.? Buy proper entry port, cushions, and
boots.? They are readily available from Tessco.? Below is a 2-port
4" entry port I used at my repeater site.? Use a masonry hole saw
to cut the holes then mount and seal this plate.? Get cushions
appropriate for the cable size and number of cables used.? Below
are some examples.? Remember you should have a ground kit on each
cable outside of this port bonded to your EGB and a PolyPhaser on
the inside bonded to your MBB/MGB - so installing this should be
as easy as pushing 1 ft of cable through the port, installing the
cushion and boot, tightening it up, and connecting the coax to the
PolyPhaser.? Make sure you leave the provided rubber port covers
on any unused entry ports.? Whatever you do, DO NOT do the hack
thing and try to turn a port cover into a boot/cushion.? I have
seen this too many times when idiots take a utility knife and just
cut a hole - then they may try to seal it with Butyl which dries
out and falls off over time.? None of this stuff is that expensive
- just buy the right parts.
Dan Woodie, CETsr
KC8ZUM
--
Thanks and 73, Jim W7RY
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In my opinion...
NO!
That's what calking is for.
These things have horrible return loss figures.
73, Jim W7RY
On 11/24/2022 10:38 AM, Lewis Horn
wrote:
Is it better to use a bulkhead like this to run cable through
concrete block or run a tube with heliax? ?We are in an area where
we have small critter problems like lizards and mice.
Thanks and Happy turkey day!!!!
KD6YTS?
--
Thanks and 73, Jim W7RY
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Re: any motorola cabinet keys for sale?
sp? Southern Pacific?
That's what comes to mind to this old RR tech. Did you mean 'special'?
73, Nate, N0NB
--
"The optimist proclaims that we live in the best of all
possible worlds. The pessimist fears this is true."
Web:
Projects:
GPG fingerprint: 82D6 4F6B 0E67 CD41 F689 BBA6 FB2C 5130 D55A 8819
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Re: any motorola cabinet keys for sale?
A lot of tower companies are banning cabinets altogether to keep people from "sneaking" in more radios.? Some radios
actually depended on the cabinet to limit oscillator leakage.? A certain tower co. did an inspection after buying out
another and found radios not listed and won lawsuit for thousands in back rent and kicked out all associated with the
group.? Make sure you have paper.
Occasionally, mot would use a different key for some big sp customer.? Note that Chicago Lock made locks for many
customers and uses.
Back in the day, the on-call kit had 2 ea 1 foot diameter key rings with many smaller key rings on them, along with 2 big
10 inch thick binders with sp instructions codes combos and key #s.? Way too much to keep track of.? Imagine going
through all of them to try to access a failed radio.
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Hello Lewis,
Do not use those "connectors" on anything above HF if at all.? They are a waste of good money!? We purchased an assortment of the various lengths.? Ran them through the RF lab and found them to be so bad we tossed them in the junk.? We cut one of the short ones up and found a spring connecting the two center pins!?
If it's not Amphenol, Kings, etc. I don't use it!? Save your radio finals, use good connectors.? I also do not use UHF connectors on anything if I can help it.? Too lossy, poor connection, etc.? I use N or better at home.
A PVC rain tight box outside with a PVC pipe through the wall to another PVC pull box inside with Poly-phasers as others have suggested is highly recommended.? Ground rods outside with each cable grounded to as others have recommended is the way to go especially since you live in Florida where lightning is the heaviest in the world!?? You can also put the Poly-phasers in the outside pull box on a copper busbar and eliminate the inside box.? Just bring in a heavy ground line too and ground all your equipment to it.? A short busbar with a dozen or so holes works great.? All depends on the size of your station and the number of antennas.
DX engineering has everything you need.? Their PCV boxes, ground bars, lightning arrestors, etc are of high quality and have reasonable prices.? If you know someone with a commercial account with Tessco or Hutton better yet.
Do it right, do it once.? Not to mention protect your equipment and house from lightning as much as possible!? And if it looks good, the XYL may not mind it too!
73, Shanon KA8SPW
On Thu, Nov 24, 2022 at 11:38 AM Lewis Horn < hornl@...> wrote: Is it better to use a bulkhead like this to run cable through concrete block or run a tube with heliax?? We are in an area where we have small critter problems like lizards and mice.
Thanks and Happy turkey day!!!!
|
When in the cell industry, the cell sites used the large hole bulkhead entry points for the coax and GPS cables.? One of the ports at one cell site did not have the boot on it and I had the <redacted> scared out of me when I opened the building's door and a bird flew into my face.?
After that, to keep the critters out, a 'critter proof' expanding foam (bought at Granger, but i've seen it at the big box home improvement stores as well) was squirted into the bulkhead "pipe" after the cables were installed, and then the boot placed over that. The foam wasn't too bad to remove if the cable needed to be changed.
Eric WB6TIX
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Well, I feel silly. I only looked at the pic of the eBay listing and ASSumed those were UHF bulkheads. After I sent the email I went to close the eBay browser window and saw they say they are type N, not UHF. I've never seen, let alone measured, an extended-length type N bulkhead like that; lacking any data I'd stay away from them. I'm quite certain that none of the well-known and reputable manufacturers make extended-length type N bulkheads.
--- Jeff WN3A
toggle quoted message
Show quoted text
-----Original Message-----
From: [email protected] <[email protected]> On Behalf
Of Jeff DePolo WN3A
Sent: Thursday, November 24, 2022 12:42 PM
To: [email protected]
Subject: Re: [repeater-builder] Bulkheads
Is it better to use a bulkhead like this to run cable through concrete block or run a tube with heliax?
You didn't say what the intended use was (HF rig, VHF/UHF rig, repeater,
???), but generally speaking, you do NOT want to use any kind of extended-
length UHF bulkhead feedthrough like that. The impedance of any "UHF"
device is quite a ways off 50 ohms, typically in the 30-40 ohm range
depending on dielectric. A 4-inch bulkhead would effectively be a 35 ohm Q-
section on 440 - your 50 ohm antenna would become a 25 ohm load (2:1
VSWR) as seen by your radio.
Again, I don't know all of the details of your installation, but my first instinct
whenever running cables through a wall is to use a Microflect port...
--- Jeff WN3A
--
This email has been checked for viruses by Avast antivirus software.
www.avast.com
|
Is it better to use a bulkhead like this to run cable through concrete block or run a tube with heliax? You didn't say what the intended use was (HF rig, VHF/UHF rig, repeater, ???), but generally speaking, you do NOT want to use any kind of extended-length UHF bulkhead feedthrough like that. The impedance of any "UHF" device is quite a ways off 50 ohms, typically in the 30-40 ohm range depending on dielectric. A 4-inch bulkhead would effectively be a 35 ohm Q-section on 440 - your 50 ohm antenna would become a 25 ohm load (2:1 VSWR) as seen by your radio. Again, I don't know all of the details of your installation, but my first instinct whenever running cables through a wall is to use a Microflect port... --- Jeff WN3A -- This email has been checked for viruses by Avast antivirus software. www.avast.com
|
Don't ever use that garbage.? Buy proper entry port, cushions, and boots.? They are readily available from Tessco.? Below is a 2-port 4" entry port I used at my repeater site.? Use a masonry hole saw to cut the holes then mount and seal this plate.? Get cushions appropriate for the cable size and number of cables used.? Below are some examples.? Remember you should have a ground kit on each cable outside of this port bonded to your EGB and a PolyPhaser on the inside bonded to your MBB/MGB - so installing this should be as easy as pushing 1 ft of cable through the port, installing the cushion and boot, tightening it up, and connecting the coax to the PolyPhaser.? Make sure you leave the provided rubber port covers on any unused entry ports.? Whatever you do, DO NOT do the hack thing and try to turn a port cover into a boot/cushion.? I have seen this too many times when idiots take a utility knife and just cut a hole - then they may try to seal it with Butyl which dries out and falls off over time.? None of this stuff is that expensive - just buy the right parts.
Dan Woodie, CETsr
KC8ZUM
|
Lewis,
You can cut a hole in the concrete (I assume you are talking about the foundation)? then install ABS pipe, which is rugged.
If the wife objects on the color, and you want to use the white PVC use the heavy thickness of schedule 40 or 80.? A third choice is the "gray stuff" electrical pipe, again use the heavy thickness type.
I've done all three type and settled on the later, because of it's neutral color.? My wife does not care on the color.
Next, seal the (little) space between the pipe's outer surface and the concrete walls (hole).? When you have installed all the lines you can seal it with foam (cheap) way or the correct way are "donuts" around the lines.
There's a lot of slang around the amateur community.? "Heliax" is just a brand of hard-line so be aware there are other ones out there.?? Full copper jacket is all well and fine, but sounds like a little overkill for your station at home???
Unless you are concerned about coupling from one line to another.?? With that thought in mind how many line runs are you planning?
As with any install, plan ahead for expansion. It's like a hard drive, if you think you need a 100GB, get a 200. ?
If you are following R-56 standards and want surge protection you can install protectors, called SPDs (surge protection device) and there are different brands out there.? ?
The line would come into the house/shop and within a few inches install the SPDs. Also, they need to be grounded to something well.? Don't rely on water pipes and such.??
Lighting protection is the process of "managing" a million volts down to a few kilovolts; something you can work with.? You want all the equipment to rise and fall at the same potential.? This is speaking in a few microseconds.
There are other points to ground from the tower, but it's in the manual.
That's the short story; the R-56 manual is huge and could take you a year to understand however it's the world standard on this subject.
I hope that helps.
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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Re: any motorola cabinet keys for sale?
I've never heard of a 2131 but I do have a 2253 if I recall correctly. It was a rare bird and only opened up certain Motorola cabinets.. The 2553 was the more common one for the older upright jobs. I wouldn't be surprised if there was some other offbeat versions out there
On Thu, Nov 24, 2022, 10:24 AM TIM HARDY < w7trh@...> wrote: Hello Group,
I have a "2131" key. Could not find it on the list. As I recall, it was with some hamfest treasures forty years ago. Motorola??
73 de Tim
AE7TH
> On 11/24/2022 8:06 AM K8TB <k8tb@...> wrote:
>
>?
> Folks,
>
> You know when a website has dotted all the dots, when they have an
> article, (needed), that explains just keys.
>
>? ??? ??? This is simply put, awesome!
>
> To all of you, even though I've been in this hobby for 55 years, and put
> my first repeater on the air at the age of 18 (over five decades ago), I
> have learned so much from the folks on this site, and from the repeater
> builder web site. Yes, we should be thankful for our families, jobs and
> homes, but having a group like this gives me just that much more
> knowledge to help out my local amateur radio community.
>
> This is a wonderful group of people, and I thank you you all.
>
> Tom Bosscher K8TB
>
>
>
>
> On 11/23/2022 10:56 PM, Kevin Custer wrote:
> >
> > Corrected the last entry - and here's everything you'd want to know
> > about radio locks and keys:
> >
> >
> >
> > Kevin W3KKC
> >
> >
> >
> >
> >
> >
>
>
>
>
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Re: Correct email address for N6CES
Thanks Kevin, and for all the work you do for us. Happy Thanksgiving Frank? N6CES?
On Thu, Nov 24, 2022, 4:53 AM Kevin Custer < kuggie@...> wrote:
Frank,
It looks like you figured it out on your own....
Let us know if you need further assistance.
Happy Thanksgiving,
Kevin W3KKC
On 11/23/2022 11:51 PM, Frank Perkins wrote:
Hi folks, the R-B group emails have been sent to
both n6ces.r@... which is?
correct, and an earlier address frank.jan1965@...
which jointly goes also to my wife.
Could you possibly direct the group's email to
me N6CES Frank Perkins to n6ces.r@...Thanks
|
Is it better to use a bulkhead like this to run cable through concrete block or run a tube with heliax? ?We are in an area where we have small critter problems like lizards and mice.
Thanks and Happy turkey day!!!!
|
Re: any motorola cabinet keys for sale?
Hello Group,
I have a "2131" key. Could not find it on the list. As I recall, it was with some hamfest treasures forty years ago. Motorola??
73 de Tim
AE7TH
toggle quoted message
Show quoted text
On 11/24/2022 8:06 AM K8TB <k8tb@...> wrote:
Folks,
You know when a website has dotted all the dots, when they have an
article, (needed), that explains just keys.
??? ??? This is simply put, awesome!
To all of you, even though I've been in this hobby for 55 years, and put
my first repeater on the air at the age of 18 (over five decades ago), I
have learned so much from the folks on this site, and from the repeater
builder web site. Yes, we should be thankful for our families, jobs and
homes, but having a group like this gives me just that much more
knowledge to help out my local amateur radio community.
This is a wonderful group of people, and I thank you you all.
Tom Bosscher K8TB
On 11/23/2022 10:56 PM, Kevin Custer wrote:
Corrected the last entry - and here's everything you'd want to know
about radio locks and keys:
Kevin W3KKC
|
Re: any motorola cabinet keys for sale?
Folks,
You know when a website has dotted all the dots, when they have an article, (needed), that explains just keys.
??? ??? This is simply put, awesome!
To all of you, even though I've been in this hobby for 55 years, and put my first repeater on the air at the age of 18 (over five decades ago), I have learned so much from the folks on this site, and from the repeater builder web site. Yes, we should be thankful for our families, jobs and homes, but having a group like this gives me just that much more knowledge to help out my local amateur radio community.
This is a wonderful group of people, and I thank you you all.
Tom Bosscher K8TB
toggle quoted message
Show quoted text
On 11/23/2022 10:56 PM, Kevin Custer wrote:
Corrected the last entry - and here's everything you'd want to know about radio locks and keys:
Kevin W3KKC
|
Re: Correct email address for N6CES
Frank,
It looks like you figured it out on your own....
Let us know if you need further assistance.
Happy Thanksgiving,
Kevin W3KKC
On 11/23/2022 11:51 PM, Frank Perkins wrote:
toggle quoted message
Show quoted text
Hi folks, the R-B group emails have been sent to
both n6ces.r@... which is?
correct, and an earlier address frank.jan1965@...
which jointly goes also to my wife.
Could you possibly direct the group's email to
me N6CES Frank Perkins to n6ces.r@...Thanks
|
Re: any motorola cabinet keys for sale?
Thank you. I stand corrected. It's been too many years. I believe we had both keys 2553 and CH751 on one key tag, hence my erroneous assumption it was one key, The key tag and keys were missing. Only the list/legend remained. It does ring a bell that I've?seen the 2553 that, I believe, looked like the same style key as the 2135. I have MOT 1 keys and others as well. I haven't found my other collection of keys on a 6 inch diameter ring but likely have the 2553 as well. I do have many of the ubiquitous 2135.
73, Kimo KH7U
On Wed, Nov 23, 2022 at 5:57 PM Kevin Custer < kuggie@...> wrote: On 11/23/2022 9:34 PM, Eric wrote:
>
> If I recall correctly, and I'd appreciate it if others could check
> me....2135 for Motorola mobiles and newer base gear, 2553 for the old
> indoor cabinets, 2141 and 2252 for various Motorola IMTS mobile radios
> and control head locks.? CH751 for the 4 foot outdoor base station
> cabinets.
Corrected the last entry - and here's everything you'd want to know
about radio locks and keys:
Kevin W3KKC
|
Re: Correct email address for N6CES
At the bottom of each email are a number of links including an
unsubscribe link, along with the address that message was sent to.
On 11/23/2022 8:51 PM, Frank Perkins
wrote:
toggle quoted message
Show quoted text
Hi folks, the R-B group emails have been sent to
both n6ces.r@... which is?
correct, and an earlier address frank.jan1965@...
which jointly goes also to my wife.
Could you possibly direct the group's email to
me N6CES Frank Perkins to n6ces.r@...Thanks
|
Re: any motorola cabinet keys for sale?
THANK YOU!!!!!? It turns out I have quite a few of the keys listed on that page.?
Eric
WB6TIX?
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Karl Shoemaker
Chris Boone WB5ITT
Kevin Custer