I used to work with a real bad pot-head. He'd climb
to the top of a tower and smoke up a storm. Would
he qualify the site as the highest repeater?
He did good enough work, just took 3 times as long
and you had to eat pizza after every job.
No one said anything because he'd climb the tall
Thanks to all the help here and repeater-builder.com I got it figured out.
Quite interesting actually.
I verified the input to the duplexer had 42 watts by using a coupler on the
duplexer input cable and hooking it up to my service monitor.
And hooked it all back up and I had 42 watts into the
In order to do a meaningful calculation, I would have to know the type of
dielectric in the coax to determine the velocity factor. The VF will be
less than one.
73
Glenn
WB4UIV
At 07:36 PM 10/01/04, Tim S. wrote:
Thanks to all the help here and repeater-builder.com I got it figured out.
Sorry Glenn. Don't have that info.
I vaguely remember R9P or something.
-Tim
www.ldservice.com/tim/tim
-Original Message-
From: Glenn Little WB4UIV [mailto:[EMAIL PROTECTED]
Sent: Friday, October 01, 2004 5:18 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder]
Well Tim, that is going to be real close to 3/4 wave length at your
freq. assuming a .66 prop facter like RG214. Still It would never
hurt to have a matching device between the Tx and the duplexer.
Normally it would be in the form of a pi network for the band in
question. They are easy to
Hi All
I have the need to use a VHF/UHF band splitter on a tower. Any experience
out there?
I have a Larsen AD 2/70 Antenna Duplexer that looks like it would do with
judicious use of of coax seal.
Gran K6RIF
Yahoo! Groups Links
* To visit your group on the web, go to:
Hello,
I am using the old Microwave Associates cross band couplers on my commercial
tower for high band and UHF, works well and so far in 5 years it's never
given any problems. I have redundant 1 5/8 Heliax receive lines with
crossband couplers and one 1 5/8 Heliax line with the same crossband
At 06:21 PM 10/1/2004 -0700, you wrote:
Is there a repeater on the space station?
I wonder if it is a Mastr-Pro or a ??
---No, it's a (s)Pace.
(showing my age?)
Ken
(FWIW, my repeater was at 10,023 feet for many years. Do I win anything?)
Is there a repeater on the space station?
That's gotta about as high as you can get I would
think..
I wonder if it is a Mastr-Pro or a ??
Leon-N2HLT
--- skipp025 [EMAIL PROTECTED] wrote:
I used to work with a real bad pot-head. He'd climb
to the top of a tower and smoke up a
Tim,
Your experience is a reminder that repeater construction is not an exact
science!
The fact that the power through the duplexer changed radically when the
jumper cable length was changed is evidence that your power amplifier
was not correctly matched to your duplexer. Although the length
That is interesting that both you and Coy mentioned the z-matcher.
I have never heard of one. I will be looking into it for the sake of
knowledge enrichment ;-)
I assumed that the input cable length from the pa to the duplexer did not
matter and that I hit some kind of magic wavelength length
--- In Repeater-Builder@yahoogroups.com, Ken Arck [EMAIL PROTECTED] wrote:
At 06:21 PM 10/1/2004 -0700, you wrote:
Is there a repeater on the space station?
I wonder if it is a Mastr-Pro or a ??
---No, it's a (s)Pace.
(showing my age?)
Ken
(FWIW, my repeater was at 10,023
Hello list!
As many of you may know an associate of mine is in the
process of retiring. For the past several weeks we
have been cleaning out the storage area full of radio
gear collected dust for many years. Today I came
across the following gear up for sale if anyone is
interested, if not I'll
I like to tune the duplexer with service monitor for best peak and notch
like you did then hook up repeater and check reflected power at transmitter
output as you did and compare foreward and reflected readings with duplexer
inline and out of line. If reflected power is more with duplexer inline
If you still have this I am verry interisted in it if you believe it works?
I have a vxr 5000 UHF that I need to add it to or if you have any thing 5-10
in and 50 out?
1 each RF Gain Power Amplifier rack mount 19 UHF
Model # RF 445U, I had no N connectors to test this
unit but it's drive is 6
Hi there, I have no reason to believe it doesn't work,
I opened up the case and used the nose
method...Everything smells good, no burnt pcb stuff,
like I said I have no N connectors to load it up
with.
I figure at $75.00 bucks it still a deal as an
untested amp.
If you want it, it's yours...
-Original Message-
From: Thomas Oliver [mailto:[EMAIL PROTECTED]
I like to tune the duplexer with service monitor for best peak and notch
like you did then hook up repeater and check reflected power at
transmitter
output as you did and compare foreward and reflected readings with
Excellent explanation Eric. This is what I was getting at
when I suggested he try different cable lengths, but you
explained it much better.
I went through this on a 2 meter repeater once. It took a
couple of hours but I arrived at a cable length that got
the matching about right and the PA
The MCC RC-1000 will give you the three tone Courtesy tone that you
desire look here http://home1.gte.net/k4lk/mcc
73
AC0Y
--- In Repeater-Builder@yahoogroups.com, XE2SI [EMAIL PROTECTED] wrote:
Lo que deseas y mucho mas lo puedes tener con el controlador
RI-300 y lo puedes ver en el
I have one of these too. If it were my tower, I would
try putting it in one of those plastic watertight
electrical boxes and weatherseal it.
If I was getting free space on someone else's tower, I
would go out an buy the best splitter I could afford
and only climb the tower once. I have always
Just wondering if anyone else has attempted to convert a vhf Maxtrac to 222mhz? I would be interested in the results. I was able to get the receiver to go up and meet original specs easily. Even the exiter went easily. The pa seems to be my biggest hurdle. Hoped someone else may had broken this
I want to be able to run a beam to one location but still run the omni
for all round coverage, what kind of equipment do I need? Going to be
using the repeater for warehouse coverage but need the beam to get the
signal to the house some distance away. So both antennas are TX at the
same time.
OK, here is my test. I am sending this at 1:56 PM Pacific time.
It seems to take nearly a day for messages to clear this list.
-- Original Message --
Received: Thu, 30 Sep 2004 02:49:00 PM CDT
From: Paul Finch [EMAIL PROTECTED]
To: [EMAIL PROTECTED] com
I have a UHF R100 and need to know if I need a duplexer if I am going to
be using two antennas. Can someone help?
Thanks
Dakota
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.766 / Virus Database: 513 - Release Date: 9/17/2004
John, et,all
Yahoo has had some serious trouble with the list server the last few
weeks. In talking with someone that seems to have some insight, they
are making changes and doing upgrades which has caused this mess. I
have been told that it should clear up in a few days. I guess we'll
What did you do to get the Receive and Exciter to go there?? I would
love to use some of my more "modern" moto stuff on that band.
James
[EMAIL PROTECTED] wrote:
Just wondering if anyone else has attempted to
convert a vhf Maxtrac to 222mhz? I would be interested in the results.
I was
The Club Deluxe II functions almost identically to the RLC-3 and costs a lot
less. I will handle up to six radios plus an autopatch (included) for under
$1200. You can find more information at
http://www.link-comm.com/rlcclub.html. Disclaimer: I work for Link
Communications.
Steve
At
So from what I am getting here.
Only some PA's are affected by the cable length. Mine happens to be a
Master II Tband. It's only trial and error to discover it the problem. It's
trial and error to make the cable length right so the PA is happy.
If I understand this right, what cause the
. Although the length of the
cable is certainly a factor, you should also check to be
certain that the cable is not defective.
What would be the best way to check the cable for not being defective?
I checked the output directly off the PA and then through the cable and it
was the same.
I would like to offer a few points from working on MII for 35 years. Ex
Engineer retired now!
1. The output Impedance of the MII Amps is a nominal 50 ohms; actually it
varies over quite a wide range and both inductive and capacitive
reactance's. The mfg tolerances of the output transistors could
Tim S. wrote:
So from what I am getting here.
Only some PA's are affected by the cable length. Mine happens to be a
Master II Tband. It's only trial and error to discover it the problem. It's
trial and error to make the cable length right so the PA is happy.
Right. Wacom pointed this out
Wow, thanks Fred and Kevin.
That sums it up quite well for me.
I'm one of those guys who needs to know why its fixed even after its fixed!
I appreciate the detailed explanations.
-Tim
-Original Message-
From: Kevin Custer [mailto:[EMAIL PROTECTED]
Sent: Saturday, October 02, 2004
You may be creating a severe phasing problem when attempting to use
dissimilar antennas simultaneously. There will be many narrow lobes of
high gain adjacent to narrow lobes of very low response.
It might be better to use just a modest-gain Yagi, say four elements, at
the end of the warehouse
Since the purpose of a duplexer is to combine TX and RX in one antenna,
the simple answer is no.
However, you might need to use cavities separately to prevent desense.
Assuming a 50 watt transmitter, a 0.35 uV receiver, and a 5 MHz
separation, two antennas separated vertically by 35 feet might
At 11:17 AM 9/30/04, you wrote:
I want to be able to run a beam to one location but still run the omni
for all round coverage, what kind of equipment do I need? Going to be
using the repeater for warehouse coverage but need the beam to get the
signal to the house some distance away. So both
35 matches
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