David,
Thanks for the quick response! I went back to my manual collection, and
found that I did have the C revision- but the page in question was in the
wrong place. Once again, I am glad that I kept these old manuals- there's
always some tidbit of information that is buried in them that makes
I have an opportunity to get a combiner/filter panel from a 220-222Mhz
ACSSB system that was abandoned years ago. Has anyone experimented with
making a 222Mhz duplexer out of the parts in the Celwave rack that was
used in this system?
73, Joe, K1ike
I made a BpBr style duplexer from an Aerial Facilities Limited
combiner. Had 4 Band pass cavities that were about 8 square.
Removed one coupling loop and made the other bigger with a johansen
trimmer capacitor to set the notch. About the only problem it the
coupling loop still rotates so it has
Hi Joe,
I have a large number of the Securicor, Intek 220MHz ACSB
trunking combiners removed from service here on the West
Coast (California). T'was at one time quite the build-out...
going from Texas up through Alaska.
At first glance it appears least one of almost every antenna
combiner
Hi Skipp,
The combiner in this rack is a Celwave TJD220-5T and there is another
number on the rack, Model 720160 (forgot where this was located on the
equipment). My goal is to come up with a plan for a 222mhz duplexer for
a friend's linking project. I shouldn't have sold my 222 repeater
Hi Joe,
I don't have all the model numbers recorded... so a picture
of the unit says a thousand words mucho betta'.
I'll email you a picture to indicate if this is the unit
you have... take this off the group.
cheers,
skipp
Joe k1ike_m...@... wrote:
Hi Skipp,
The combiner in this
The fuse you are describing is available from www.mouser.com part #
576-0459005.ER
. It is a SMF type fuse. you will find them also in the Motorola P110, GP300
and GP350 portable radios but they are rated at 4 amps for the portables. I
hope this information helps.
N5SLI
Hello all, maybe I'm misspelling the name of the company but I can't seem to
find the company who makes the Decibal Products type of antennas.
They are the antennas that have the folded diploes that are very popular on
most amateur repeater sites.
I always thought they were called DB products
Decibel Products got bought by Andrew Corp.
Andrew got bought out by CommScope.
www.andrew.com
Also search for db224 that is probably the antenna you are referring to.
Tony, KA3VOR
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On
Thanks Tony, actually I'm looking for a UHF antenna, any suggestions from that
company.
- Original Message -
From: Tony Alviar (Home)
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, December 31, 2008 4:41 PM
Subject: RE: [Repeater-Builder] Decibal Products Antenna
Decibel (1/10 of a Bel, of course)
DB was absorbed by RFS some time ago:
http://www.rfsworld.com/
Kevin Custer
Brian K. Gaskamp wrote:
Hello all, maybe I'm misspelling the name of the company but I can't seem to
find the company who makes the Decibal Products type of antennas.
They are the
Actually when I did a search on DB224 it took me to this site.
http://www.wiscointl.com/decibel/dipoles/index.htm
Thanks,
Brian
- Original Message -
From: Kevin Custer
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, December 31, 2008 4:50 PM
Subject: Re:
Hi Brian,
Folded Dipole antennas are/were made by a number of different
companies... and of course be prepared for a bit of sticker shock.
You're probably talking about the popular Decibel Antennas...
for a quick reference look see this information on my web
page:
Kevin are you sure about that?
DB-- RFS?
Phelps Dodge-- Celwave -- RFS and a few others.
I'm pretty sure DB -- Andrew -- Commscope
In fact running DB224 on www.andrew.com --
www.commscope.com/andrew/eng/index.html
and drilling down to find the Base Station Antenna search tool
Kevin may have started celebrating the New Year early ;-)
- Original Message -
From: Tony Alviar (Home)
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, December 31, 2008 8:47 PM
Subject: RE: [Repeater-Builder] Decibel Products Antenna website
Kevin are you sure
Not a bad idea for tonight!
Have a pleasant one!
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey
Sent: Wednesday, December 31, 2008 8:53 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Decibel
Brian,
That I believe (wisco intl) is a reseller. Tesco, Hutton Communications and
others resell the antenna.
Currently running a DB408-A (450-470) on a ham repeater here in Western PA
(443.750-W3PIE) and only thing truly noticed is when comparing to business
band repeaters operating same
Tony, a corporate-fed antenna like the 408 will not exhibit downtilt or uptilt
when operated out of it's design range, however, it will exhibit slightly less
gain.
Chuck
WB2EDV
- Original Message -
From: Tony Alviar (Home)
To: Repeater-Builder@yahoogroups.com
Sent:
Skip,
I have an older DB Products UHF dipole antenna. This one has six
dipole elements fed from two splitters so that three elements are on
each split. The main cable is RG8 moisture block, and each branch is
like RG58, not labeled.
The elements are made from what looks like angle aluminum
Optimum vertical spacing is between 0.85 and 0.95 wavelength as measured
between element centers. This may or may not be possible due to constraints
of the phasing harness, so you may have to settle for something else.
Chuck
WB2EDV
- Original Message -
From: motarolla_doctor
Chuck,
Reason I mentioned downtilt is two of the UHF antennas on the tower with
same gain factor on 450-470 with downtilt in the design has similar coverage
to this unit.
I'll agree a reduction in gain will do the same.
Thanks for the correction.
Tony
_
From:
Pat,
The part number you quoted is not the fuse for an MTR2000, and won't even
fit the fuse holder. The correct fuse- there are two- is a Littelfuse type
453 NANO fuse rated at 5 amperes. Mouser carries this fuse as stock
number 576-0453005.MR, for $ .67 each. The type 453 fuse CAN be surface
You could probably plot out the patterns on some graph paper just for something
to do. It may make some sense, then again, maybe not. Been there, done that ;-)
Chuck
WB2EDV
- Original Message -
From: Tony Alviar (Home)
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday,
Mike -
I often wondered the same thing. I can only assume that it created the best
pattern for each model.
Chuck
WB2EDV
- Original Message -
From: Mike Dietrich
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, December 31, 2008 10:16 PM
Subject: Re:
On most of the ones I've seen, the model numbers were the same for both models.
All of the elements can be rotated 90 or so deg if you want, but these are ones
that came form the factory that way. ?
Mike KB5FLX
- Original Message -
From: Chuck Kelsey
To:
Yes, the DB420's (in omni configuration) came with the top four pairs rotated
90-degrees from the bottom four. A DB-408 (in omni configuration) alternated
the rotation for each element pair. It also shows this way in the photos in the
catalog.
Chuck
WB2EDV
- Original Message -
Joe
These should work fine.
There is also a single cavity that was used in the receive line, IIRC.
I have a complete system that I picked up to haul it off. The
transceivers were made by SEA.
Their stock answer is that they are not modifiable for any use other
than what they were designed
I was surfing the WWW and found what I believe is a Great site and
very Informative just put in Your City and look at all the Info about
it
So what makes it interesting to us in the Communications Hobby,
Well We can now see Where some of the Signals are coming from that We
hear on our
At 08:17 PM 12/31/08, you wrote:
Joe
These should work fine.
There is also a single cavity that was used in the receive line, IIRC.
I have a complete system that I picked up to haul it off. The
transceivers were made by SEA.
Their stock answer is that they are not modifiable for any use other
FWIW, none of this information shows for my community.
- Original Message -
So what makes it interesting to us in the Communications Hobby,
Well We can now see Where some of the Signals are coming from that We
hear on our Scanners and some even list the Freqs coming from the
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