Mike,
You have programmed active low for both COR and PL but it sounds as
though you have not used command 005 to set the receiver access mode
to require both COR and PL. By default it requires only COR for the
repeater to go active. In that state the PL input will simply be
ignored.
With
Yahoo! Groups Links
--
Paul Kelley, N1BUG
http://www.n1bug.com
I guess I was lucky in my first few years as a repeater owner.
Lately I have nothing but grief in many forms. (Yeah I know, welcome
to the real world!)
Can someone tell me in basic terms what is the difference between an
isolator and an intermod suppression panel which contains an isolator?
If the Comprod is really the equivalent of the Sinclair SRL235-2, I
must respectfully disagree with this. The instruction sheet for the
SRL235-2 says the opposite, that maximum radiation would be
perpendicular to a line drawn as described. I can scan a page from
the Sinclair instruction sheet
.
--- Jeff
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Paul
Kelley N1BUG
Sent: Wednesday, June 24, 2009 5:36 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] SRL235-2 Bi-Directional
Antenna
Jeff DePolo wrote:
Now, having said all of that, my real-world experience with
single-frequency-pair repeaters (not combiners or other multicarrier
systems) is that I've never had a PIM problem that I could attribute to
connector plating. Any connector that I install is silver-plated (or H+S
John J. Riddell wrote:
Paul, there is a product made here in Canada by DW Electro chemicals called
Stabilant 22 that works wonders on connectors. It is a liquid and is about
35
dollars for a very small bottle.
You just put a very small amount of it on each mating surface of the
I did a brief test (a few minutes each) on the remaining 7 dipoles
from the noisy SD2352 array. The only way I know to see if they are
noisy in duplex service is to stick them on the repeater and see
what happens. I used a weak signal radiated into the dipole under
test for audible indication
Nate Duehr wrote:
I would also cautiously throw in here (knock on wood) that we've had
EXCELLENT luck with the 2-bay vertical Sinclair folded-dipole antennas
(snip)
(Heck, if I knew the 2-bays worked THAT good from this type of site, I'd
have put these things up sooner! S much easier to
OK, I guess it's about time I asked this. Is there someplace I can
find a reference on various connector types (plated or not, type of
plating) vs PIM/IMD/noise in duplex systems and/or in high RF
environments? I am looking at replacing my run of LDF5-50A and
wonder what type of connectors I
Skipp,
Do you have any idea WHY the models with two dipoles side-by-side
are problematic and the in-line models are not? Are there
differences in the construction of the individual dipoles that cause
problems? Differences in the phasing harness? I'm thinking about
using these dipoles to build
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 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
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
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
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
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
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
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
Several weeks ago I posted about my ongoing battle with duplex
noise on a 2 meter repeater. I have now found a big piece of the
problem (maybe all of it) but I'm a little surprised. I am wondering
if others have had similar experiences.
Two years ago I put up a new (well... NOS, actually)
Mike,
Thanks. That is interesting. I don't recall hearing about this with
dipole arrays before. What is the failure mechanism? Deterioration
of the coax due to repeated slight flexing? The antenna was
supported bottom and middle.
Paul N1BUG
Mike Mullarkey wrote:
Paul,
I
That's what I thought Chuck. Thanks! I haven't yet decided whether I
want to rip the heat shrink tubing off an element and disassemble it
to see what coax is inside, which is why I asked.
I was sort of contemplating whether it might be possible to replace
all that coax with RG-214 in an
together.
All that said, I've never worked on a Sinclair. I'm going by info that I
believe to be correct as to what is inside the element.
Chuck
WB2EDV
- Original Message -
From: Paul Kelley N1BUG paul.kelley.n1...@gmail.com
To: Repeater-Builder@yahoogroups.com
Sent
this?
Dave WB2FTX
No virus found in this outgoing message.
Checked by AVG - www.avg.com
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06:22:00
--
Paul Kelley, N1BUG
http
Got one here too! Honestly you should see some of the
professionally installed repeaters with mobile radios screwed to
plywood, wires dangling everywhere, exposed electrical connections,
repeater buildings with rusty metal sheets for siding flapping in
the wind, bent leaning towers (installed
Mike Morris WA6ILQ wrote:
As I recall, an early ARRL VHF manual had a brief chapter on
repeaters, and I believe there were two articles that were of
interest. One was the duplexer and another was a four bay folded
dipole antenna for repeater use.
I'd like to get a scan of that ARRL
Mike Morris WA6ILQ wrote:
The lock-shut-through-its-own-contacts latching relay uses
power as long as it is activated.
As another gentleman pointed out, the magnetic latching
relay only uses power when the coil is activated (i.e. a
pulse to change the state of the relay).
I would want to use
I am also working toward a multiple receiver voted system and have a
question. I was reading
http://www.repeater-builder.com/tech-info/votingcomparators.html
and wondering about how to implement a site suicide command where
power is disconnected from the entire remote package requiring a
trip
RAMSEY KITS has a unit that is supposed to work from commands via your
telephone touch pad. It’s about $39. You call the unit up, touch the
phone keys, and the dtmf commands can turn on and off devices plugged
into it. I wonder could this be converted to work on the input of a
recvr,
Randy,
I will be using a small repeater controller. What I want is some way
to kill power to everything in the box... receiver, link
transmitter, controller, the whole works. This would be a last
resort in the event something fails in such a way that it is
critical to shut it down, at a time
Mike, Paul, Mike, Martin, and others...
Thanks for the ideas. I will try out a couple of them and then make
a decision on exactly what method to go with. I had not thought of
using a latching relay. The idea of a husky relay or maybe a beefy
SCR to short the supply on the inboard side of a
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