I have an MSR2000 half-duplex base station that was removed from railroad
service (161 MHz). I would like to convert it to a repeater for one of our
local volunteer fire departments. Does anyone have alist of boards required to
make the station act as a full duplex repeater. The output will be
Hello:
I would like to build a low power 5 watt crossband repeater for 2m/440 use. I
recall seeing this set up using 2 HT's, also 2 mobile rigs.
Has anyone built something to suit my needs, or are there kits available ?
Thank you
73 de Fred W1POP
i built a low power (in band) repeater using 2 IC-2at's and a NHRC-2 controler.
that thing worked great for a 3 watt repeater. now you can do the same using a
2, 3, or 4 a, or at walkie. its rather simple. to be honest, if you have the
knowledge to pass the tech ham test, you can build this.
Paul -
Were the U-bolts that attach each element arm to the mast stainless or hot dip
galvanized? I do know of one (UHF) Sinclair array that used plated U-bolts and
they rusted.
Chuck
WB2EDV
Several weeks ago I posted about my ongoing battle with duplex
noise on a 2 meter
Chuck,
They are hot dip galvanized and there is no sign of rust (yet). When
I took this apart I checked every bit of hardware for looseness and
rust, found nothing suspect.
One thing I did notice when I got the antenna was the factory Y
splices and heat shrink over the 1/4 wave 35 ohm
Thanks Burt!
Great info there.
If all the dipoles seem to be OK (not noisy) I am thinking of making
my own harness to use 4 of them. I've constructed several
multiple-antenna EME arrays so I understand the concepts and the
importance of equal lengths, etc.
My only concern with making my own
That is interesting Gran.
The noise did not change with weather conditions, be it wet or dry,
dead calm or gale force winds. I didn't try spraying with water
while testing, but did tap on all the dipoles and wiggle as much
coax as I could reach. It didn't seem to react to any of that. It
was
Hi Paul
The info I gave you applied to the SD214 series antennas (old SRL210A4
oe 210C4). I am guessing that it would also apply to the cheaper SD2352
series.
Let's hope you don't need to get inside the dipole itself. BTW what is
the diameter of the aluminum tubing used on the SD2352? The
Hi Burt,
Let's hope you don't need to get inside the dipole itself. BTW what is
the diameter of the aluminum tubing used on the SD2352? The SD214 uses
3/4in OD.
I *am* hoping!
They use 3/4 in. OD on these also. The width of the folded dipole is
4.25 inches and the tip to tip (outer
Chris,
I *think* I have what you need at the shop. I have not returned from Dayton
yet. It's a long story, but I am in Indianapolis while my father-in-law
recovers from a massive heart attack.
(Prayers are always appriciated)
I will see what I have around when I get back to the shop and let
Paul Kelley N1BUG wrote:
Hi Burt,
snip
You could try using 3/4 wavelength matching pieces to get the extra
length. That should be equivalent to 1/4 wave but will be more
sensitive to frequency changes.
I only need to extend them by about a foot to get ideal spacing
between dipoles,
I've seen references to the use of a 440 duplexer on the
third harmonic for 1.2 GHZ use... What would be better, a plain
notch type, 4 or 6 cavitiy unit, or a BP/BR type... Thinking
that the notch reject would be easier especially when considering
it's a 20 MHz split for 1.2 repeaters.
Dave
The Icom IC-22A is crystal-controlled, so has ultimate flexibility (at the
price of crystals).
The Icom IC-22U came after the IC-22S (23 channel with diode matrix board) --
I had the 22S one in late 1970s (popular unit at the time).
Generally, I have seen them sell on eBay for ~ $15 to $50
Or the white, powder residue. That's just as bad as the green stuff.
Chuck
WB2EDV
- Original Message -
From: Burt Lang b...@gorum.ca
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, May 19, 2009 10:00 AM
Subject: Re: [Repeater-Builder] Sinclair dipole array premature failure
(noisy)
Hey Folks,
I have two repeaters here on two and 440 Problem is I have to run one
antenna for both...so, dual band antennas work fine...problem is even the heavy
duty version (x510) of Diamond and the best Comet have failed... Am running 70
watts on two and 60 watts on 440 In each case
Keep in mind that the 22S and possible the other variations had a
problem of intermittant solder joints on the steel pins that were used
as feedthrus on the circuit boards.
Burt Lang
Greg Beat wrote:
The Icom IC-22A is crystal-controlled, so has ultimate flexibility (at
the price of
Ron,
Have you contacted Diamond's tech support on the 510? They claim that to
be the heavy duty repeater version and as such should make it good. I've had
pretty good luck with thier support systems on another antenna.
I have ordered a 510 for use on a 440 repeater trailer setup I'm
rwjohn49 wrote:
Hey Folks,
I have two repeaters here on two and 440 Problem is I have to run
one antenna for both...so, dual band antennas work fine...problem is
even the heavy duty version (x510) of Diamond and the best Comet have
failed... Am running 70 watts on two and 60 watts on
Ron,
Telewave makes the ANT 150 and 450 series antennas. We have mounted the UHF to
the back side 180deg from the VHF using schedule 80 2 1/2 od aluminum pipe. You
will want to top and bottom support the mast due to the length of it but works
really well. If you want to use a coupler get
Dean,
I do plan to contact them.Hope they can explain what is going on
Ron
- Original Message -
From: Dean Nash
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, May 19, 2009 12:12 PM
Subject: Re: [Repeater-Builder] Repeater Antenna
Ron,
Have you
I only have one tower up at present and it serves for hf and I have a yagi on
topsothe repeater antenna is on a mast above the yagi Back 25 years
ago, I could climb without too much troublenow that I have gotten into my
golden years, I don't climb so well. Guess the time has
Update... the entire harness looks pristine. No sign of any problem.
That goo they put inside the plastic clam shells around the
factory Y splices is rather interesting stuff!
I hope I find one or more noisy dipoles when I test 'em... otherwise
I'll be left with a mystery and have no idea what
On Tue, 19 May 2009 09:03:51 -0400, Paul Kelley N1BUG
paul.kelley.n1...@gmail.com said:
I have decided no matter what I'm not putting it back up as an 8
dipole bidirectional array so I will take apart the original harness
for inspection. I will also test each of the dipoles on the repeater
Dean,
Just talked to Wayne, the tech at Diamond. Turns out that he said static
buildup can zap the capacitors in the antenna... apparently, that is what has
happened... Have to return it to them so they can put heavier duty caps in the
thing Up the tower again..
Ron
-
You could test the harness with dummy loads connected in place of each
element, if you can round up enough dummy loads.
And you could install the entire array at a different location and test it
there.
Two more options to think about.
If the single element is mounted in the same location as
You didn't say, but are you running on some other antenna right now.
(I'm looking here for how you know it was the Sinclair making the noise,
and not some nearby rusty joint problem in a high RF field
environment. (Are you in a high RF field environment? Any new
transmitters right on top
A TOTALLY crazy idea Paul...
Just going off of your comment that it gets better when you split
antennas but is always there when the Sinclair is on the tower...
Could the Sinclair be doing something funny to your transmitter and
causing it to throw spurs?
Things would be really bad when
There's nothing crazy about that idea Nate! I get creative thoughts
when sleep deprived too. :)
I had been thinking the transmitter might be doing something funny.
I don't have easy access to a spectrum analyzer, but I think I've
ruled out spurs as the primary cause? Correct me if my logic is
I'd agree with your observation Paul. It looks like something with the
Sinclair. Now you've just got to try each element individually and rule more
out.
Chuck
WB2EDV
- Original Message -
From: Paul Kelley N1BUG paul.kelley.n1...@gmail.com
To: Repeater-Builder@yahoogroups.com
Sent:
Paul,
One test I have not noticed listed is if you've tried the Sinclair while
it was not attached to the tower (and a reasonable distance away from
anything that could affect it).
Ed Yoho
W6YJ
Paul Kelley N1BUG wrote:
There's nothing crazy about that idea Nate! I get creative thoughts
humm
maybe o/t
sinclair antenna has not be solded to comprod antenna sometime ago
73/s all
gervais ve2ckn
--
From: Nate Duehr n...@natetech.com
Sent: Tuesday, May 19, 2009 5:04 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re:
I did see Paul's reply also Nate,, I'm betting if he had some of those
spurious products with the numbers he has given, they would be too small to
see with even the best gear. I had a similar noise level issue that turned
out to be an amp and I couldn't see squat with my HP8921a, (weak S/A) but I
Ed,
That is true. I stupidly neglected to do that after removing it from
the tower and have been kicking myself ever since! I will probably
end up re-assembling it to try that... but of course now everything
has been disturbed so it may or may not act as it did before.
I did do a brief test
No, Comprod is a separate company.
Yes, the products look like Sinclair clones.
Chuck
WB2EDV
- Original Message -
From: gervais ve2...@hotmail.com
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, May 19, 2009 6:04 PM
Subject: Re: [Repeater-Builder] Sinclair dipole array premature
Chuck Kelsey wrote:
You could test the harness with dummy loads connected in place of each
element, if you can round up enough dummy loads.
I like that idea. I would have to buy a bunch of loads though, not
much chance of borrowing that many around here.
And you could install the entire
I have been reading the mail and it occures to me that some of your repeater
must need rack mount kits.
I sell Motorola Dual Maxtrec radio size (2.04x7.04 inch) rack mounts, and just
introduce our CDM 1250/1550 Dual rack mount.
I sell these on eBay at $89.95, but discount $10 ($79.95) for
There are known problems with this series of antennas... see
my previous posts bad-mouthing Sinclair regarding this same
situation.
I was only told that Sinclair has reworked the model and the
update reportedly fixed the problem. I never received a return
phone call or Email regarding my
Boy, for some reason, there's a discussion I don't recall. Oh well.
The only array from Sinclair I was aware of as being trouble was their
SRL222/SD222 series.
Chuck
WB2EDV
- Original Message -
From: skipp025 skipp...@yahoo.com
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, May
Dick, you misspelled MAXTRAC.
Are these for station racks, 19 racks? Mobile console rack?
Dick K4EIH/6 San Diego, CA wrote:
I sell Motorola Dual Maxtrec radio size (2.04x7.04 inch) rack mounts, and just
introduce our CDM 1250/1550 Dual rack mount.
That's interesting Skipp.
I'm searching. I did find a couple references to PIM/IMD problems
and one about poor signal with this type antenna.
The latter caught my eye as I've been sitting here half thinking
coverage with this single dipole I tossed up there *seems* to be as
good as with the
Andy,
What a coincidence! My radio club just received a working MSR2000 base
station a week ago, and I am digging into it right now.
First of all, please advise what the complete model number is. This should
be something like C73KSB-3106B, but some digits or letters will differ.
Please include
yes Chuck
they are ex:engineer from Sinclair and they start thir company many years
ago,i have done business with them,they are professionnal as Sinclair.
73/s
gervais ve2ckn
--
From: Chuck Kelsey wb2...@roadrunner.com
Sent: Tuesday, May 19, 2009
I have the -B version of the VHF manual already scanned, but it's 44
megs.
George, KA3HSW / WQGJ413
- Original Message -
From: Eric Lemmon wb6...@verizon.net
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, May 19, 2009 8:20 PM
Subject: RE: [Repeater-Builder] MSR 2000 simplex
Guys,
An update on the beer barrel 2m duplexer project.
(please read the embedded .pdf file for background information)
http://www.radiohamzone.com/Beer_Barrel_MK3/Beer_Barrel_MK3.htm
Ian
G8PWE
Guys,
Update on the 70cm duplexer project using surplus Tetra/Dolphin motorised
cavities.
http://www.radiohamzone.com/DolphinDuplexers/dolphin_duplexers_build.htm
Ian
G8PWE
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