my question exactly -- if the new site is quieter and you had the
duplexer cranked back (insertion loss increased) to get better
isolation, you may may even be able to open it up a little and get some
additional receive sensitivity... other than that, why change what works
unless there are
You may take a spectrum analyzer to the site and see what the noise floor is
at. Get the spec for the repeater what the isolation needs to be and measure
what your antenna is seeing. Look at adding more band pass cavities to the
transmit and receive. Look at adding an isolator on the transmitter.
$3,000 new? Tessco list price is $1,046.00
Joe
Randy wrote:
I have a Repeater antenna. Radio Frequency Systems,
#220-3AN Freq: 150.5-158.
New is about $3000.00 ... I'll take 1/2 plus shipping
for anyone that wants it.
.
.
http://www.rfsworld.com/dataxpress/DataSheets/?q=220-3AN
Truly a long thread about portable repeaters, so I thought that I should
throw in my two cents;
I've built several of these out of ex-PMR MPT1327 trunking mobile radios;
http://gallery.lakki.iki.fi/R58_portable_UHF_repeater
The radio goes with a ham radio firmware which has advanced repeater
Hi Joe,
I'm still trying to comprehend why you would need replacements just
because a site is more quiet. If they work at the crowded site, they
should work fine at the quiet one.
That's just it --?they don't work all that well at?this mountaintop site with
literally hundreds of RF sources.
Our club has 7 of the TK750 and two TK850 repeaters running on several
different mountaintops, mostly medium RF intense. They have worked without any
issues for a couple of years now. I don't know how they stack up against the
vertex, but they seem well suited for what we are doing with them.
--- One person says one thing...Like I've said before; I know nothing
about Motorola products...
.
In Repeater-Builder@yahoogroups.com, Joe [EMAIL PROTECTED] wrote:
$3,000 new? Tessco list price is $1,046.00
Joe
Randy wrote:
I have a Repeater antenna. Radio Frequency Systems,
What sort of problems are you having with the system at the current
site, and generally how much quieter is the new site. Was there any
additional filtering or other adjustments made to get the gear
functional at the old site that might be eliminated at the new site
without sacrificing so much
At 10/2/2008 16:06, you wrote:
Hi Tom,
As others have said, try the dummy load at the antenna end of the cable
and see if there is any desense.
Then try disconnecting the antenna input to the receiver from the duplexer
and place a dummy load on the receiver. Turn on the transmitter and
Randy wrote:
--- One person says one thing...Like I've said before; I know nothing
about Motorola products...
If you know nothing about it, you might want to at least do a simple
Google search for:
super stationmaster 220-3an
If you did, you would see $1046.00 is the correct list price for
--- I probably should have done a Google Search. My first choice was
to search for the manufactor of the antenna first. Radio Frequency
Systems.
.
In Repeater-Builder@yahoogroups.com, Ed Yoho [EMAIL PROTECTED] wrote:
Randy wrote:
--- One person says one thing...Like I've said before; I know
I'm happy to announce that the Colorado D-STAR group has completed our
site move to Mt. Thorodin, Colorado.
A full D-STAR stack of repeaters consisting of VHF, UHF, 1.2 DV and 1.2
DD are now operating from approximately 10,482 feet above sea level.
and I-70 to approximately Limon, CO, almost to
Western Kansas
with all due respect, it's 90 miles from Limon to the KS border
- Original Message -
From: Nate Duehr
To: [EMAIL PROTECTED] ; [EMAIL PROTECTED] ; Repeater-Builder@yahoogroups.com
Sent: Friday, October 03, 2008
Both of these units have been tested and operate at mfg specs. They
were linked together at one time and used as a rack mounted receiver.
I have and will include, the aluminum rack in which they were mounted.
Units are rated at 75W tuneable down to 35W
I am also enclosing (2) brand New, (in
Hi All!
I have a couple of Ritron UHF repeaters here and kind of curious if anyone
has had a chance to screw around with these little job site repeaters. Anyone
moved them to the ham bands? For their age, I was surprised they worked,
had clean audio and rated output. New rocks are $21
Something you might want to try (if you can quickly) is put a Micor (or
similar) front end on the front end of the receiver.
Joe M.
[EMAIL PROTECTED] wrote:
Hi Joe,
I'm still trying to comprehend why you would need replacements just
because a site is more quiet. If they work at the
Brian,
The Repeater Builder Technical Web Pages may have the information you are
looking for... I have one of the UHF Ritron repeaters here.
http://www.repeater-builder.com/ritron/ritron-index.html
73 Dave WB2FTX
- Original Message -
From: [EMAIL PROTECTED]
To:
Brian I have converted two ritron responder., model rr-450
They work good., but internal duplexer is right on the edge., an external
one would work better., (out of range)., as they are indeed 450-470 mhz
Jerry VE3 EXT
Just relative to your post here...
If you're playing with a Ritron Repeater of circa 80's
vintage... then you probably have one of two types. The first
is the black shoe-box model, which at first glance is considered
a toy repeater. Under the right conditions the black shoe-box
repeater
I have one of the early model that I use for portable temporary use at
events. Not fancy or a whole lot of power, but does a real good job in
that application.
I would not want to try to use one in a high RF environment, but for low
level stuff they are pretty good and the price is right.
I am sorry to but in but did they make this in a vhf model by chance (the
silver face ones would work better) that way I can use them for some on site
portable repeater work for some very small coverage areas like a warehouse? We
are running 151/159 range for our set.
Thanks
Peter Summerhawk
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