Here is what I have to deal with.
I have a HOA, and I am allowed on antenna. At this point I have a two meter
repeater, Micor 100watt, and want to add a 70cm repeater 30watt. I would like
to use a dual band antenna for both systems.
What should I use to mix the two? A good duplexer? Or is
Hi Folks,
Anybody heard of one of these?
It came out of a repeater on 154.xx.
It has a total of 8 cavities, 4 of which
have an additional 'T' which has a 15 1/2
stub made of RG-9. It's shorted at the end
(braid to center conductor).
The other 4 do not have this additional T.
Any ideas on how
Put the yagi at the critical station location :-)
Regards
Gareth Bennett
It sounds like what you have is a transmitter combiner. In other words,
multiple transmitters can be connected to a single antenna. This is not
a duplexer. It may be possible to reconfigure the cavities into a
duplexer for your repeater, but it is not an easy task.
73, Joe, K1ike
Jason,
There a bunch of products on the market that will do what you need. Most of the
time they are called diplexers, but sometimes they are named as duplexers.
For the best results you would want a combining unit with the lowest loss (less
than 0.5 db). Probably the best ones around are
The short answer, Grady, is no. The Maratrac uses the same oscillator
for transmit and receive. To make a one-box repeater like with a Micor
or MastrII, you have to be able to separate the TX and RX so that both
work at the same time. Just can't be done with a Maratrac.
That being said, the
Hello Jason,
I agree with Dwayne, except that I see that you are running 100 watts on
2 meters and plan to run 30 watts on 70cm. That power level would
probably burn up one of the ham quality diplexers in time. You are
better off with a commercial unit, such as the TX/RX one Dwayne
Jason,
I just looked at Telewave, here is what they have to offer.
MODEL
DESCRIPTION
FREQ. RANGE
TX POWER
LIST PRICE
TS-1545
Crossband Coupler
132-174 406-470 MHz
150 Watts
$340.00
TS-1545H
Crossband Coupler
Hi Joe,
Normally, that's what I figured it 'should be', based on the
name on the plate. But it only has 3 SO-239s, one marked
Ant, RX, TX was taken out of service on a commercial
repeater - I was there when it was taken down.
This thing is quite old.
Thanks,
Tim W5FN
--- In
I was looking around on the Telewave site and found transmitter matchers
as shown below. I wonder if anyone has used one on a repeater, such as
the GE MastrII?
73, Joe, K1ike
MODEL
DESCRIPTION
FREQ. RANGE
TX POWER
LIST PRICE
TZM-50
E-Z Match -
Skipp and all- finishing up this conversion, looking for instructions on
properly tuning this P.A.
It seems to be a canadian 40watt intermitent P.A., would like to find the power
control board instructions., it's presently putting out 40+ watts in the 155
MHz range.
It looks very close to a
An outboard Z-matcher works as well as the internal one on an M2 station PA;
it shouldn't matter where along the transmission line it's placed.
If you're looking for Z-matchers, there are two Decibels (one VHF, one UHF)
on eBay right now for less money.
As has been beatened around on this list
Thanks Jeff,
Have you found that adjustments of power level output of the MastrII PA
has required much retuning of the Z-matcher? I have a plan that may
drop power output during power failures and I'm wondering how the
z-matcher might affect things.
73, Joe, K1ike
Jeff DePolo wrote:
An
Have you found that adjustments of power level output of the
MastrII PA
has required much retuning of the Z-matcher? I have a plan that may
drop power output during power failures and I'm wondering how the
z-matcher might affect things.
Yes, the match will vary as output power is varied.
Gents
I have a federal signal director model siren in my 70's TV police car that I
use for shows etc.
The siren works ok (hehe) but the PA sounds terrible. I suspect a bad mic.
Does anyone have a schematic or a source for the service manual for this unit?
Thanks in advance
Ian R.
VA2IR
How about a like new mic, $20.00 shipped to your door??
de Lee
K4LJP
73
On Thu, Jun 25, 2009 at 1:23 PM, Ian Miller va...@securenet.net wrote:
Gents
I have a federal signal director model siren in my 70's TV police car
that I use for shows etc.
The siren works ok (hehe) but the PA sounds
What' s the model number?
Or if' there is no label, can you post a photo of the unit in the
photo section of the yahoogroup?
At 10:23 AM 06/25/09, you wrote:
Gents
I have a federal signal director model siren in my 70's TV police
car that I use for shows etc.
The siren works ok (hehe) but
I will post a pic, however the director model had a central switch with 4
positions, an on-off volume switch on the right hand front panel, a manual
siren button on the left had side of the panel, and the mic and fuse holder are
on the bottom of the unit. THe outside of mine is painted beige.
Model # MNCT, also small square, sticker which has 0548 on it. Hope this
helps you out
de Lee
K4LJP
73
On Thu, Jun 25, 2009 at 2:04 PM, Mike Morris WA6ILQ wa6...@gmail.comwrote:
What' s the model number?
Or if' there is no label, can you post a photo of the unit in the
photo section of the
That kinda surprises me... how does changing power level affect
the match?!
(Not saying I don't believe you Jeff... I know you've probably
tested it six ways from sideways... I'm just wondering Why?
What am I missing here...?)
--
Nate Duehr, WY0X
n...@natetech.com
On Thu, 25 Jun 2009 11:05
Do a Google search for this document located on Cisco's web site.
gtlmrip.pdf
What you are asking is called EM signaling as applied to radio over IP.
-Kevin
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of
You're probably thinking how will the load Z change, and the answer is, it
doesn't.
The changes that occur are at source end inside the PA. The ideal load Z
for the output devices changes when you vary the output power. If you
tune the Z-matcher to present a load Z to the devices that results
Good day
Looking for some advice.
I am using a UHF MastrII repeater as an extra receive site that is outside
mounted in an outdoor GE cabinet. The receiver is 449.4500 and CG 114.8 on a
Stationmaster antenna at 215 feet, and transmit out is 420 at 10 watts into a
yagi at 50 feet. I am using ½
Try the take home test. If it still acts up, you'll have ruled out
something at the site.
What about the ICOM? When you swapped receivers, did you simply pull and
swap the ICOM and re-tune the RX? I ask because I had a bad ICOM (or the
crystal) give me fits once. Seems like it gave me similar
Thunderstorm = shorted semiconductor junction (sometimes). Might not be
completely shorted either. I'd start looking at the repeater control board.
hope you have an extender card.
Ran a bunch of MII repeaters years ago and we ended up with PolyPhaser
lightning protection devices on every I/O;
Seen that crap before on an IDA board. I like to call it Ghost
Keying. In my case the repeater would key it's self about 20 seconds
after the controller droped the PTT signal. Turned out to be a leaky
PNP transistor in the PTT circuit on the IDA board, Replaced it with a
2N3906.
Hi all,
My spare Mastr II reciever audio is best decribed as fuzzy/slightly distorted.
It seems worse on a weak noisy signal. I have checked the crystal frequency and
it is dead on. I went thru the reciever alignment and this reciever is really
hot as far as quieting goes. I suspect the problem
At 6/25/2009 06:10, you wrote:
Jason,
There a bunch of products on the market that will do what you need. Most
of the time they are called diplexers, but sometimes they are named as
duplexers.
For the best results you would want a combining unit with the lowest loss
(less than 0.5 db).
Seems like I used to have to inject the IF freq and tweek that up first.
UHF or VHF? I'll look at my manuals tomorrow.
E
Eric Lowell
Eastern Maine Electronics Inc.
48 Loon Road
Wesley ME 04686
eme@starband.net
www.satnetmaine.com
207-210-7469
--- On Thu, 6/25/09, w4sef
At 6/25/2009 12:10, you wrote:
That kinda surprises me... how does changing power level affect the match?!
The characteristics of the class C RFPA change, in particular the duty
cycle. My guess is that as the power output is decreased, the output
impedance of the final transistor would go
Hi Ian
I have the manual for the Director Electronic Siren
Model PA-15A.
I can mail it or possibly scan it.
Need your address and e-mail.
73's
Ted K1YON
k1...@juno.com
Criminal Lawyers - Click here.
31 matches
Mail list logo
