Hi all,
I just discovered an Australian company Measurement Innovation Pty Ltd has
made a Windows PC based software for HP 892x series radio service monitor for
measuring cable fault location and much more.
http://www.measurement.ashop.com.au/c/25306/1/rf-tools.html
Demo on YouTube
Hi Ed,
Understood, was just coincidental that you message popped up as was
looking at potentially adding a pre-amp to my repeater which is not at a
great height nor ever likely to be - long story.
Have tried a few from very good kit form to general purpose broad banded
variable types with
Tim,
I have a two meter repeater that outputs 250 watts (approximately +54
dBm) into the duplexer. After the 93 dB of rejection that the duplexer
provides for shear power reduction toward the receiver port, -39 dBm of
transmitter power leaves the duplexer receiver port - headed toward the
Here is the duty spec on the R1225 radio. I used to maintain LOTS of these in
different flavors. You can have the GR 1225 desktop, a RKR 1225 rack mount
housing or a GR400 wall mount housing. All of the GR1225 repeaters that I
inherited failed eventually because they were set at high power.
Hi Kevin,
Thanks for the info. I've used the PLL MastrII exciter on a couple of
systems also.
Now, since this duplexer is of the 'notch' variety, I already have about
100db of notch (on the TX side) that is tuned to the RX freq. Shouldn't
this be enough?
Tim
With 250mW (+24dBm) into the transmit port... antenna port is
a quality 50 ohm load, I see -72dBM at the receiver port. (pretty
much what I expect.. 1.8dB loss through the xmit side, 100dB
notch through the RX side.
Those numbers are fine.
With it all hooked up receiving an input signal
Kevin - how did you get the MICOR 250 Watt VHF Amplifier to go down to
2-Meters? Or was it a factory 140-150 MHz range unit originally?
I see plenty of the 100-watt (I think they're a TLD-1692) amps that are factory
2-Meter range PA decks (I have a few spares, in case I ever need them) but
Hi Jeff,
Thanks for the reality check... loved the real-world example of
the mobile unit.
At this point, I'm leaning towards the bad mojo/karma phase
of the moon!
Got a 'spare' set of low-band cans that need to be stored somewhere
it's warm? :-)
Thanks,
Tim
Jeff,
You did an excellent job of explaining the complex interrelationships among
2m repeaters. However, not all 6m repeaters have a 1 MHz split; my 6m
repeater on Tranquillon Peak follows the California band plan and has a 500
kHz split. The duplexer has four cans about 12 in diameter and five
Tim wrote:
Hi Kevin,
Thanks for the info. I've used the PLL MastrII exciter on a couple of
systems also.
Now, since this duplexer is of the 'notch' variety, I already have about
100db of notch (on the TX side) that is tuned to the RX freq. Shouldn't
this be enough?
Yes, 100 dB of
On 7/30/2010 10:15 AM, Kevin Custer wrote:
Tim wrote:
Hi Kevin,
Thanks for the info. I've used the PLL MastrII exciter on a couple of
systems also.
Now, since this duplexer is of the 'notch' variety, I already have about
100db of notch (on the TX side) that is tuned to the RX
Re: Simrex - GLB Pre-Selector Pre-Amplifier
Yes, but the NF is unpublished unknown. I therefore
assume it's poor, maybe 3 dB?
Once again, the NF depends on what device arrives in your
specific Simrex (aka GLB) Pre-Selector. It wouldn't hurt
or be impossible to ask.
A Chip Angle
Larry - I didn't.
The 250 watts is produced by a GE MASTR Pro/II 4EF5A1 capable of 330
watts continuous. The MICOR high-band tube amplifier, IMHO, is junk
compared to the GE 4CX250R based VHF power amplifier. The 4EF5A1 is
designed to operate from 144 to 174 MHz. without modification.
skipp025 wrote:
The less gain is related to the internal filtering stages,
not the device. I would expect the version with the GasFet
to have the typical expected NF for that device. Any other
available active devices to have Noise Figures commensurate
with their typical expected values
Hi
as do most european 6mtr repeaters, 500Kc split
73
Steve
- Original Message -
From: Eric Lemmon wb6...@verizon.net
To: Repeater-Builder@yahoogroups.com
Sent: Friday, July 30, 2010 3:57 PM
Subject: RE: [Repeater-Builder] Repeater transmit levels at the receiver?
Jeff,
You did an
Hi Tim
it should be plenty, what about the notch on,the rx side, which
I assume is tuned to reject the tx freq.
Steve
- Original Message -
From: Tim tahr...@swtexas.net
To: Repeater-Builder@yahoogroups.com
Sent: Friday, July 30, 2010 4:42 PM
Subject: Re: [Repeater-Builder] Repeater
Hi Steve,
Both sides are exhibiting pretty much the same specs - about a 100dB
notch (each side tuned to the opposite freq), and about 1.5dB attenuation
at the desired freq.
All cables are new RG142.
Something's gotta be bad wrong if a 250mW input on the TX side will
make noise.
Using the
Kevin - Thanks for the clarification. I have one of those 1/4 KW VHF MICOR
Repeaters in my garage, and wish I could get it to move down to 2-Meters. We
have a local government agency that has one on 151 MHz, the sticker (the
Motorola sticker that says ___ ua = ___ watts) on the inside of the
Hi Tim
that should work fine, very strange. As a matter of interest how far
apart are the tx and rx units and I take it all the covers and screening
cans are fitted..
Steve
Tim wrote:
Using the Micor's exciter - about 270mW. Cannot see any spurs/noise
within 80dB of the main carrier.
I wonder Most of the MICOR exciters I have converted to 6M
result in more than 270 mW of power - in fact, 400 to 600 mW is
common. I wonder if something is amiss at the
Actually, the output is about +26dBm, so it's closer to 400mW.
I've also tried a VX-5 on low power, and got the same result.
Tim
On 7/30/2010 9:52 AM, Kevin Custer wrote:
Tim wrote:
Using the Micor's exciter - about 270mW. Cannot see any spurs/noise
within 80dB of the main carrier.
I
Hi thanks for the reply
here is what the radio looks like. The 0 could be an 8, the data plate has a
gouge on that digit making it hard to tell, I was guessing as the lower right
quarter of the digit is missing.
--- On Fri, 7/30/10, Eric Lemmon wb6...@verizon.net wrote:
From: Eric Lemmon
Our Amateur radio club's Motorola MSR 2000 continuous duty amp needs repair. I
cant figure out how to remove the amp board from the heat sink. I removed all
screws from corners as well as the transistors. It seems to be held by the
center, just below the tall air variable cap. I tried heating
Most lmr radios will program gmrs frequencies. Be mindful of output power
programmed as most will do over the limit. Many ameuter radios with transmitter
mods will also do this. My radio vendor of choice is Icom. They are very tough
with mil specs and all.
--- In
Hi Kev
would it be feasable to use a sig gen cranked right up ?
Steve
- Original Message -
From: Kevin Custer kug...@kuggie.com
To: Repeater-Builder@yahoogroups.com
Sent: Friday, July 30, 2010 5:52 PM
Subject: Re: [Repeater-Builder] Repeater transmit levels at the receiver?
Tim wrote:
Agree on the MSTR PRO 4EF5A1. Had one in service on the amateur band (VHF HI)
and it ran withoout a burp for 8 years. Would like to find another one to use
with the MASTR II.
David
Jul 30, 2010 03:39:08 PM, Repeater-Builder@yahoogroups.com wrote:
Larry - I didn't.
The 250 watts is
You did an excellent job of explaining the complex
interrelationships among
2m repeaters. However, not all 6m repeaters have a 1 MHz split; my 6m
repeater on Tranquillon Peak follows the California band plan
and has a 500
kHz split. The duplexer has four cans about 12 in diameter
and
At this point, I'm leaning towards the bad mojo/karma phase
of the moon!
Let's start out with the basics:
1. How much desense do you have?
2. How are you injecting the Rx signal, and what are you using for the
signal source?
3. What are you using for a dummy load when doing the desense
Didn't Lloyd Bridges work that one to death in Airplane ?
At 07:43 PM 07/13/10, you wrote:
Nothing if you're name is roger.
Smile emoticon
From: mailto:llhorl...@gmail.comLarry Horlick
Sent: Tuesday, July 13, 2010 10:02 PM
To:
We have clearance Clarence.
Roger, Roger, whats our vector, Victor?
John Hymes
La Rue Communications
10 S. Aurora Street
Stockton, CA 95202
http://tinyurl.com/2dtngmn
- Original Message -
From: Mike Morris
To: Repeater-Builder@yahoogroups.com
Sent: Friday, July 30, 2010 11:07
No it doesn't. and don't call me Shirley!
Kb0wlf
-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
buil...@yahoogroups.com] On Behalf Of MCH
Sent: Friday, July 30, 2010 3:19 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re:
Both.
There was a transmitter on beep (that almost nobody heard),
and there was a transmitter off beep that everyone heard - with
about 100Hz difference in the two tone frequencies.
Read this: http://en.wikipedia.org/wiki/Quindar_tones
What it doesn't mention is that there was an audio notch
Alright
Everyone get it out of your system
http://www.imdb.com/title/tt0080339/quotes
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Please note that we are not allowed (i.e. it's illegal) to modify our Part
97 Amateur radios to transmit in any other service. We can bring Part 90
and 95 radios into Part 97, but not the other way around.
-Brian
On Fri, Jul 30, 2010 at 8:29 AM, cmr359 cmr...@yahoo.com wrote:
Most lmr
I would disagree with that. It is legal to 'open up' our radios.
What is illegal is actually transmitting on other services (genuine
emergencies exempted for the sake of argument).
Joe M.
Brian Raker wrote:
Please note that we are not allowed (i.e. it's illegal) to modify our
Part 97
Steve wrote:
Hi Kev
would it be feasable to use a sig gen cranked right up ?
Depends on how clean the signal generator is. I'd think it doesn't have
enough smoke (output capability) to really be beneficial
Many generators have a strong carrier (here we go again) adjacent from
the desired
I just ran into this again last night.
This time I was working with a high band HT600 that I was going to put on 2m.
It is a 146-152 unit.
The bandsplit screen shows the radio as a 146-152 unit, but when programing
each channel, at the top right of the screen, the software displays 143-152.
I
Tim wrote:
Actually, the output is about +26dBm, so it's closer to 400mW.
Good - that's more like it.
I've also tried a VX-5 on low power, and got the same result.
Obviously, something is wrong with the operation of your duplexer or
interconnecting cabling. I really don't think it's
Hi
was just a thought, I use a Marconi 2015 with the synth unit and that
is pretty clean, be interesting to see what Tim,s problem is
Steve
- Original Message -
From: Kevin Custer kug...@kuggie.com
To: Repeater-Builder@yahoogroups.com
Sent: Friday, July 30, 2010 9:50 PM
Subject: Re:
I think they use that spec trace on the opening of the tv show Fraser
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Kevin Custer
Sent: Friday, July 30, 2010 4:51 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder]
Are the CDM's similar to the Radius M1225?
--- In Repeater-Builder@yahoogroups.com, James Adkins adkins.ja...@... wrote:
I disagree on the price of the CDM's. You can get the CDM-750 (4-channel)
for as low as $75 to $125 if you watch for them on e-bay. The CDM-1250 and
CDM-1550 are more
Found three in the garage. Anyone want them for the price of the shipping.
Jim K7OET
I wonder how many of the -53 naysayers have or have used a Cushman
CE-3? LOL! The folks that have looked at the output of one of
these on
a spectrum analyzer will get it.
K
Where I come from, we call that a comb generator, not a signal generator...
Ya gotta know the limitations of your
Sounds like someone has been watching The EnforcerMr
Eastwood.every man has got to know his limitations?
Soory could not resist!!
D
On 30/07/2010 22:35:35, Jeff DePolo (j...@broadsci.com) wrote:
I wonder how many of the -53 naysayers have or have used a Cushman
CE-3? LOL! The
Hi Kevin,
Yes, the original used RG-58.. couldn't see using it. Figured
it would give me desense!
As far as the amount of notch, I was surprised that the total
was more than each one added, but with 50 watts
coming out of the antenna port, I see -55dBm at the RX
port. - kinda made me think the
Butch,
I replied to you off list but maybe your spam filter got me. I'm interested so
please check your email.
--
Tim
--- In Repeater-Builder@yahoogroups.com, Glenn (Butch) Kanvick hotl...@...
wrote:
Hello Tim.
I just looked in my storage site and I found a Micor Base/Repeater which is
Not even close.
Joe M.
Tim - WD6AWP wrote:
Are the CDM's similar to the Radius M1225?
I guess you don't care to elaborate.
--- In Repeater-Builder@yahoogroups.com, MCH m...@... wrote:
Not even close.
Joe M.
Tim - WD6AWP wrote:
Are the CDM's similar to the Radius M1225?
Hello Tim.
The entire radio, with the transmitter, receiver, card cage, power supply
and cabinet is $400.00
If you need just the receiver, transmitter and card cage is $200.00.
Some people do not want to pay the shipping for the power supply or cabinet,
that is why I break it up into a smaller
I just need the rx, tx and pa. I can use the DC cables too. I don't need the ps
or cabinet. Pictures would be nice if you can send them. And you're sure it's
UHF low split 406-420?
--- In Repeater-Builder@yahoogroups.com, Glenn (Butch) Kanvick hotl...@...
wrote:
Hello Tim.
This message
Well, I have decided to buy and try a Simrex Pre-Selector,experiment with it,
test it...whatever. At the very least I will learn something from my
experiences and it may end up being useful to me, anyway.
I certainly appreciate the different points of view here and have learn't of
Friday, July 30th 2010 - Duly noted on my calendar! LOL
- Original Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Friday, July 30, 2010 6:53 PM
Subject: [Repeater-Builder] Re: Simrex - GLB Pre-Selector Pre-Amplifier
Re: Simrex - GLB
Tim wrote:
Hi Kevin,
Yes, the original used RG-58.. couldn't see using it. Figured
it would give me desense!
As far as the amount of notch, I was surprised that the total
was more than each one added,
Don't be - it's common for the apparent notch to be deeper than the
measured addition
It was asked if they were similar. I replied that they are not. I
figured there were too many things that were different to elaborate further.
They are both made by Motorola in Malaysia. They are both programmed
using a PC computer (albeit by different SW packages). They share the
same
Hello Tim.
Yes, it is the 402-430 Mhz. split radio. I have a coupleoftheMicorsandafew
GEMastr II's.
The TX is on 419.3750 and the RX is on 414.4750
I will get you pictures probably tommorrow afternoon.
Butch, KE7FEL/r
On Fri, Jul 30, 2010 at 6:02 PM, Tim - WD6AWP tisaw...@gmail.com wrote:
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