I was given a TPN1192B battery charger power supply to fix and then use as a
backup supply for our club's repeater. It came with manual 68P81061E50-C MSR
2000 VHF Base and Repeater Stations.
In this manual, the power supply instruction section is 68P81062E47-D Option
C28AN Battery Charger
And where I lived, channels that did not have a crystal oven installed were
designated MT, presumably meaning those channels were empty.
--- On Wed, 8/4/10, Walter H walter.howard...@gmail.com wrote:
From: Walter H walter.howard...@gmail.com
Subject: [Repeater-Builder] Re: Mastr II Mobile
Thanks for the comments and suggestions. Here's a summary and some parting
thoughts.
Tom wrote:
For de-soldering I use a de-solder iron with a squeeze bulb on it from Radio
Shack, works great.
I've got one of those. In fact, it was the first tool I tried. It wouldn't melt
the solder on the
A recent thread discussed a problem disassembling a MSR2000 continuous duty PA.
That triggers this query: Does anyone know if Motorola used a higher
temperature solder on the MSR2000 units?
My reason for asking is that this past weekend I had a hard time removing three
leaky electrolytic
Instead of piston trimmers you might want to try ARCO padders (postage stamp
size that can tolerate higher levels of rf current) or small air variable
capacitors. I have found both at reasonable prices at this site:
http://www.danssmallpartsandkits.net/
73 and aloha, Eric KH6CQ
--- On Sun,
I'm looking for the LBI for a GE PVO6BWL66 high-band receiver.
I tried the RB web site and Google but no joy.
Anyone have a lead on where I can find an electronic copy to view?
73 and aloha, Eric KH6CQ
For MSR2000 UHF RX and TX Boards
To: Repeater-Builder@yahoogroups.com
Date: Sunday, May 2, 2010, 12:21 PM
--- In Repeater-Builder@ yahoogroups. com, Eric Grabowski ejgrabowski@ ...
wrote:
Looking for a receiver board and a transmitter board from
: [Repeater-Builder] Re: Looking For MSR2000 UHF RX and TX Boards
To: Repeater-Builder@yahoogroups.com
Date: Sunday, May 2, 2010, 12:21 PM
--- In Repeater-Builder@ yahoogroups. com, Eric Grabowski ejgrabowski@ ...
wrote:
Looking for a receiver board and a transmitter board
Amen to that! However, instead of re-inventing the wheel, I find myself
spending a lot of time making discarded sow's ears into the proverbial silk
purse. g
73 and aloha Eric KH6CQ
--- On Sat, 5/8/10, N1BUG p...@n1bug.com wrote:
From: N1BUG p...@n1bug.com
Subject: Re: [Repeater-Builder] Re:
Looking for a receiver board and a transmitter board from a Motorola MSR2000
station. The boards must tune in the 440 to 450 MHz frequency range. Duplex TX
board preferred but a simplex TX board would be okay. This is for a Ham Radio
project. If you have one or both of these boards lying around
In a mobile, that would depend on what's in the drawer unit. The RF preamp, PL
encoder, and PL decoder board draw power from the 9.6 volt line. Other options
may as well. If memory serves, and I wouldn't recommend you take this to the
bank, Motorola specified a maximum current draw of 1.2 amps
Skipp, I wonder if the antenna you stole this idea from was the Hy-Gain GPG-1
high band ground plane antenna we used to use in the late '60s and early '70s.
The dc ground was a real feature of this simple antenna.
Sure wish I could remember how they connected the feedline to this antenna. I
Often times a simple solution is the most elegant solution.
--- On Sun, 11/8/09, skipp025 skipp...@yahoo.com wrote:
From: skipp025 skipp...@yahoo.com
Subject: [Repeater-Builder] Re: Midland Transmitter Audio Drive Requirement
To: Repeater-Builder@yahoogroups.com
Date: Sunday, November 8, 2009,
The only Antenna Specialists antenna I could find that meets your description
is a Base Commander Model ASP-680 series. There were 8 models covering from 146
to 174 MHz. The ASPA-680 covered from 146 to 149.5 MHz. This is a collinear
antenna that has 3 dbd gain and was rated at 350 watts
Back in the 70s I bought some IMTS GE Progress Line radios from the Western
Electric depot near Cleveland Ohio. They were being offered to Hams due to an
upgrade. I asked the tech what the letters meant and he told me they were
channel designators, one for the receive channel and the other for
I have used schedule 40 PVC for several antennas from HF thru 440 MHz without a
problem. It does have a dielectric effect however that you must take into
account.
There is another plastic pipe called CPVC that does absorb RF at the higher
frequencies. You don't want to use that.
To make sure
Eric,
Why is a quarter-wave shorted stub impractical at 2m?
I have been told that a quarter-wave shorted stub would serve two purposes:
a) provide a dc path to ground for static caused by precip or wind, and also
b) substantially reduce the strength of a transmitter's second harmonic.
73 and
I came across this company that lists dipole arrays for 220 MHz on page 38 of
their online catalog. I have no idea what the prices are, but thought I would
pass it along since I haven't seen it mentioned before on this list.
http://www.astronwireless.com/
Eric KH6CQ
--- On Tue, 6/2/09, Jeff
A local ham radio club wants to add a 100 watt continuous duty power amplifier
to their UHF repeater. They have available a 110 watt PA from a Mitrek mobile
and some massive heat sinks.
It doesn't appear that it would be very difficult to transplant the Mitrek PA
onto one of the heat sinks
I don't have any experience with Kenwood commercial radios, but I can tell you
that I have repaired may Kenwood mics for their Ham radios that had flakey SMT
capacitors in them causing them to key the radio at random times and for random
lengths of time. An easy way to test for this is to
Nate suggested shopping for an old laptop at used computer stores. Another
place to check is Thrift Stores. A few years ago I bought a CPU (mini-tower
with Win98), keyboard, mouse, and speakers for $7 at a Salvation Army Thrift
Store. It worked just fine. Okay, I'll admit that I did have to
What is the NF of a stock UHF Micor/Mitrek/MASTR II? Anyone ever measured it?
My experience has been that 16 dB gain provides a noticeable improvement, but a
low NF is the real key to success. If the preamp gain is higher than 20 dB,
it's easy to put an attenuator between the output of the
That's only true for 1/4 wave verticals. A 45 degree droop brings the feedpoint
Z up to 50 ohms (from a nominal 35 ohms).
But, for 1/2 wave verticals (which is what this one is), the radials need to be
perdendicular to the radiator for the feedpoint Z to be 50 ohms.
--- On Sun, 8/17/08,
Hi Mark,
According to my old Antenna Specialist catalog, what you have is a MINI-PAK
series,
half-wavelength, economy base station antenna. The photo shows the radials
coming straight out, but I would guess there would be some drooping due to
their weight.
Here's some info on the ASPA2010
.
YMMV
Wayne WA2YNE
On Wed, 28 May 2008 16:50:10 -0500, Eric Grabowski
[EMAIL PROTECTED]
wrote:
Wayne,
It would be great if you could do that test. I have
some VHF high band
duplexers that won't tune down into the 2 meter
band but I would love to
use them on 70 centimeters
Wayne,
It would be great if you could do that test. I have some VHF high band
duplexers that won't tune down into the 2 meter band but I would love to use
them on 70 centimeters. I too have read that not only is it possible to use 150
MHz duplexers on 450 MHz, but that the performance is
For what it's worth, I'll add my two cents:
After assembling and tuning a 2 meter Ringo antenna, I wiped it down with
rubbing alcohol and then sprayed it with urethane spar (marine) varnish, which
I bought at K-mart. I used an entire can (12 ounces maybe). The antenna
performed well through
I found tuning instructions for the DB4055 duplexer on
the R-B website, but I haven't been able to find any
specs on this unit.
Does anyone know what the insertion loss and maximum
power ratings are?
Is the low-split version suitable for use on 2 meters?
73 and aloha
Eric KH6CQ
at TX freq 70 db.
Max power is 150 W continuous and insertion loss is
0.7 db.
The versions ar A=150-162 and B 160-174.
Would be good for something like MARS or other
commercial repeater.
73, ron, n9ee/r
From: Eric Grabowski [EMAIL PROTECTED]
Date: 2008/04/04 Fri AM 03:29:17 CDT
Were Motorola KXN1086 and KXN1088 channel elements
used in any other product line besides the Mitrek?
Eric, KH6CQ
Never miss a thing. Make Yahoo your home page.
http://www.yahoo.com/r/hs
Well, I've never tried tuning one with a manual, but
the official Motorola diddle stick seems to work just
fine. Sorry; couldn't let that one pass.
Seriously though, any analog VOM with a 50 microamp
movement will work just fine. In this regard, the
Motorola Test Set is just a 50 uA meter and a
While I don't have experience with that particular
power supply, the situation you describe is
symptomatic of filter capacitor failure.
The capacitor's equivalent series resistance (ESR)
becomes so high that it doesn't filter the ac ripple
anymore.
You should be able to verify this easily by
Does anyone know for certain whether the Mitrek
HLN4181A reedless PL board can be used for encode and
decode simultaneously?
Eric, KH6CQ
Be a better friend, newshound, and
know-it-all with Yahoo!
I have a 50 watt UHF Mitrek drawer unit that I'm going
to convert to a repeater for amateur use. Before I
start the conversion, however, I wanted to make sure
the radio is working as it should.
Problem: The output of the voltage regulator is only
9.1 volts instead of 9.5 volts.
Question: Is
34 matches
Mail list logo
