At 08:56 PM 10/19/08, you wrote:
Gee, Thanks Guys for the quick replies. I have done a search on the
web pages that were sent to me and there are ones I can use.
Will now decide on which brand to purchase.
Regards
Kevin, ZL1KFM.
I don't know what the weather is like where you are, but
Thanks for all of the suggestions. However I think you
guys are missing the problem. Both repeaters work fine when
they are not linked together. As stand alone machines they
work fine and the audio sounds fine. Once I turn on the
secondary port on the NHRC-4/m2 is when the noise
Thanks for all of the suggestions. However I think you guys are missing
the problem. Both repeaters work fine when they are not linked together. As
stand alone machines they work fine and the audio sounds fine. Once I turn
on the secondary port on the NHRC-4/m2 is when the noise occurs. I'm
Folks,
*Continuation of Previous Thread: UHF Repeater Antenna Discussion*
We climbed the tower on Sunday and checked things with the wattmeter
between the Feedline and the antenna.
At the bottom, we were making 75 Watts at the duplexer output. At the
top, after going through 105' of
Mike DeWaele wrote:
Hi All,
I'm having a problem linking two mastr 2 radios together. I have one site
and want to full time have my 2 meter and 440 machines linked together.
I saw (and agree with) the grounding comments made by others. Ground
loops suck. Been there, done that.
Also
ka9qjg wrote:
Now the question and I have not seen this talked about I would
assume all I would need is a Normally closed Relay and as the Voltage
dropped below a Certain Level it would open and just break the
connection to the Battery back up , Is this the way to do it
RV (camping)
You might also want to consider the approach shown in the article on p 76 in
the November 2008 issue of QST where
a boost regulator has been placed in line...This will allow the equipment to
still see 13.5 to 13.8 volts even where the battery has discharged below the
12 volt level.
73 Dave
The switching boost regulator is a good idea for maintaining the operating
supply for the repeater, but unless that regulator also has low-voltage
shutdown provisions, to protect the battery from damage due to being drawn
down too deeply, then a seperate cutoff is needed.
Depending on the
Another problem to consider is that with the repeater keyed, when the voltage
gets to the dropout point, it will drop.
After the load is removed, the voltage will go back up and the relay will
re-engage.
There will be a point that the relay will just chatter going in and out and
sending spikes
David Struebel wrote:
You might also want to consider the approach shown in the article on p
76 in the November 2008 issue of QST where
a boost regulator has been placed in line...This will allow the
equipment to still see 13.5 to 13.8 volts even where the battery has
discharged below the
DC Grounded, in my experience, means the center pin and the coax will show
a dc short when tested with a DMM.
Lightning? Corrosion? Manufacturing defect?
JS
-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
[EMAIL PROTECTED] On Behalf Of Cort Buffington
hello, I am gabriele from Italy and I am new.
I have to gm600 radio and I would like to build a small repeater in
the uhf band.
First of all I have to program this 2 radio but where I look for the
software I have no Idea how to ask ??
there is anyone that have more experience that can help me?
My thanks is in the quoted message below, but I will repeat it since
it perhaps wasn't clear enough.
This forum appears to be a little too high brow for a common man such
as I.
--- In Repeater-Builder@yahoogroups.com, Eric Lemmon [EMAIL PROTECTED]
wrote:
The answer is in the quoted message
At 07:29 PM 10/19/08, you wrote:
I have a Astron 60 Amp Power supply with the battery back up
option it works Great I have it Fused. However in the Testing I
noticed that on Battery Back up I only loose about 10 Watts that
is fine, But as the Battery drains down the Repeater gets
Hey Ben...
Don't get your pants in a bunch...when you use words/phrases such as:
GR500 with the R1225 radio. It is in the wall mount box. The cooling
fan that came with the box...
...people think that you are familiar with electronics and will pick
up that Digi-Key is a source of electronic
Is not no measureable resistance the same as a short? Zero ohms is just what
it should show...why would that indicate damage or defect?
- Original Message -
From: Jacob Suter
To: Repeater-Builder@yahoogroups.com
Sent: Monday, October 20, 2008 11:17 AM
Subject: RE:
My intention was to indicate short.
On Oct 20, 2008, at 5:56 PM, Paul Plack wrote:
Is not no measureable resistance the same as a short? Zero ohms is
just what it should show...why would that indicate damage or defect?
- Original Message -
From: Jacob Suter
To:
Ben,
My response also. There are many list members who continue to give their
countless expertise time to this forum. Most of the regular
contributors are persons in the RF industry who are called experts.
Do you know how an expert is defined?
They have made all of this mistakes . . . . or
It is a DC grounded antenna and it measures as a DC short circuit.
On Oct 20, 2008, at 7:06 PM, Fred Townsend wrote:
It is getting a little blurry here. I hope I can clarify. It is
common practice to place a DC ground on the antenna for lightning
protection. At frequency the antenna has
Need help to order a MTR2000 service manual that have the schematic diagram of
the receiver unit, Got this unit from Ebay, Hook up the unit on my bench with a
dummy load on the TX out, and apply signal on the RX input with a IFR1200, The
squelch open at 0.12 micro-volt at 0.15 uv its 12 DB
Oh I forget to mention that I did order a service manual from Motorola
6681096E25 its don't have any circuit diagram on it, What is the correct manual
number to order
that have a circuit diagram.
- Original Message -
From: Camilo So
To: Repeater-Builder@yahoogroups.com
Camilo,
The modules in the MTR2000 station are not user-serviceable, so the field
service manuals do not contain schematic diagrams. If you believe that the
receiver module is defective, you should send it to the Motorola
Infrastructure Depot for repair. I currently have six MTR2000 stations in
The UHF Depot Manual contains the schematics. Order 6881096E35. It costs
about $195. It is not available for download, since it is copyrighted and
still in print.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of
Thank you Eric, Do you want me to sent you the receiver module so you can test
it,seeing is believing, there is always a first time, and then after that you
can sent it to Motorola on my behalf, and charge me for all the expenses in
return.
73 Camilo W4CSO
- Original Message -
Negative. I do not perform testing for Motorola. You can send it to
Motorola yourself for testing and/or repair.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Camilo So
Sent: Monday, October 20, 2008 6:47 PM
I am very sorry Eric if I have offended you, I have good intention I know this
is a problem no body have encounter, and its a very interesting trouble to
look into, what cost the cutout if stronger signal is apply, anyway sorry and
thank you for your help.
73
Camilo
- Original
At 10/20/2008 07:21, you wrote:
Thanks for all of the suggestions. However I think you
guys are missing the problem. Both repeaters work fine when
they are not linked together. As stand alone machines they
work fine and the audio sounds fine. Once I turn on the
secondary port on
Do you have speakers hooked up to the M2's? If so, do you
hear hum when
there's receiver activity?
...but if you DON'T have speakers connected, have you terminated the
speaker outputs into 4 or 8 ohm power resistors? I've seen
Mastr II audio
PAs go bonkers when those outputs aren't
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