design. Also, the R1225 is almost double the size of the M1225, since the
box also contains a controller and a lot of shielding. There is no way to
make the M1225 a duplex radio.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil
Sent: Friday, October 23, 2009 2:39 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: what pac-rt means
Eric Lemmon wrote:
> Has anyone answered the original poster's question? I believe that he
> wanted to know what the term "PAC-RT" means. Someho
Has anyone answered the original poster's question? I believe that he
wanted to know what the term "PAC-RT" means. Somehow, this thread got
off-topic into how it works and how it's used.
73, Eric Lemmon WB6FLY
ugged, measure the resistance between the grounding prong of the AC plug
and the negative DC output terminal. If the reading is in the megohms,
fine. If it is a short, you know what to do...
73, Eric Lemmon WB6FLY
volt battery.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of George C
Sent: Sunday, October 18, 2009 11:17 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Motorola Suitcase Repeater
ng the repeater
functions.
73, Eric Lemmon WB6FLY
- Original Message -
From: "Joe" mailto:k1ike_mail%40snet.net> >
To: mailto:Repeater-Builder%40yahoogroups.com> >
Sent: Saturday, October 17, 2009 6:49 PM
Subject: [Repeater-Builder] Emergency Medical Systems Duplex / Re
equipment is not convertible to narrowband.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of lsasmazel
Sent: Saturday, October 17, 2009 5:19 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater
previous owner, locate
the radio shop that maintained it, and possibly identify the documents you
need- if they won't just hand them over. Knowing the frequencies used is a
giant first step in that process.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Bui
er, and you can
assume that a 5-amp supply will suffice. But, be careful to determine what
voltage is required to run this thing, before hooking up your favorite
Astron power supply. The unit may require 7.5 or 10 VDC, and you don't know
that without more documentation.
73, Eric Lemmon WB6
replace the X1 crystal, since there is no
adjustment. Crystal X1 is type HC-184, part number 260-862-6Z.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of kerinvale
Sent: Saturday, October 17, 2009 2:36
and a well-equipped workbench, this could be an
interesting project. Good luck!
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of lsasmazel
Sent: Friday, October 16, 2009 10:40 PM
To: Repeater-Builder@
ique to that
specific radio. The first step is to identify each module in your repeater,
then we can advise you which LBIs you need to make up a manual for your
repeater.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoo
Tim,
The information is on page 47 of the manual here:
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301
Sent: Thursday, October 15, 2009 9:55 AM
To: Repeater-Builder@yahoogroups.com
Gary,
Thanks for the tip! For those who don't have a file of Motorola's Service
and Repair Notes, I have attached the referenced SRNs.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of
of the desired coverage area, you might
look into offset-pattern dipole antennas, Yagis, or corner reflectors. It
makes no sense to put an omni antenna in service where all of the potential
users are in one sector.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@
as it sounds, and it
should be employed only after careful study of the antenna radiation
patterns and the desired coverage areas.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of men...@pa.net
Sent: Saturd
vertically.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Peter Dakota
Summerhawk
Sent: Wednesday, October 07, 2009 4:15 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Question
has
an insertion loss of only 0.9 dB. If your measurements are accurate, the
duplexer tuning seems to be way off. What make and model duplexer is it?
What instrument are you using to measure RF power?
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
analyzer
to pick up the signal- don't connect into the feedline at all, since doing
so will upset the conditions you want to monitor. It's possible that the
radio itself may have a problem, and I don't think that has been ruled out
yet.
73, Eric Lemmon WB6FLY
-Original
Mike,
The TRN5329A "Multiple PL Decoder Module" is in the MSR2000 Control and
Audio manual 6881061E40-C.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike Morris WA6ILQ
Sent: Monday,
h bandwidth when you buy it.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Tony KT9AC
Sent: Sunday, October 04, 2009 4:49 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Narro
r
uses a circuit element known as a four-quadrant multiplier, meaning that the
comparison of voltage and current is continuous through 360 degrees. I have
just such an instrument, a WD-767 digital wattmeter made by VIZ. It can
display true-RMS volts, true-RMS current, and true power in watts.
that does this on a regular
basis. It will cost a few hundred bucks, but you will have a
perfectly-tuned duplexer. Once you have done this, it's important to
prevent any "diddle-stick artists" from attempting to "improve" the tuning
after the duplexer is instal
eplug to your radios.
Do this on both radios, and run your test again. You should see a
significant improvement in clarity and a lower noise level.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Co
band, and is available in either 1-25 or 25-50 watt versions.
Although they are not cheap, being in the $800 class, they are great radios
and work in VHF and UHF Amateur bands right out of the box.
73, Eric Lemmon WB6FLY
--- In Repeater-Builder@yahoogroups.com
<mailto:Repeater-Buil
Mark,
Most of the buttons are available individually, as follows:
MPL button is 3805672X02, $ 1.87
Scan button is 3805672X03, $ 1.87
ZONE button is 3805672X79, $ 1.87
Vol rocker is 3805668X03, $ 2.37
Mode rocker is 3805668X02, $ 2.37
73, Eric Lemmon WB6FLY
-Original Message-
From
Norm,
The TX-RX specifications on catalog sheet C1024G9 for a 28-38-03A duplexer
are 80 dB isolation and 1.9 dB insertion loss. Your readings are certainly
extraordinary.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil
, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Tony Faiola
Sent: Saturday, September 26, 2009 12:36 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] F M Schematic Digest, a
cannot produce an output much above +10 dBm.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jim Cicirello
Sent: Wednesday, September 23, 2009 12:36 PM
To: Repeater-Builder@yahoogroups.com
Subject
that minimizes sensitivity to temperature.
Keep in mind that the shack temperature is not the only factor to consider;
a typical six-cavity duplexer on a 250-watt repeater will be heated by the
transmitted carrier due to insertion loss of 2.2 dB, amounting to about 100
watts lost inside the cavities.
d none, I still believe that your duplexer is not tuned
correctly. Since you state that the duplexer in question was used on the
repeater for more than a decade with no problems, and presumably on the same
frequency pair, why are you re-tuning it? You probably have heard the old
saying: &
it to your pair. What method
and equipment are you using to tune the duplexer?
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of terry dalpoas
Sent: Saturday, September 19, 2009 2:11 PM
To: Repeater-Bu
The number TDF6980A is a Motorola number, for a PD5134-18BK duplexer made by
Celwave. Insertion loss is specified as 1.2 dB per side, isolation is 75 dB
minimum, and it can handle 400 watts.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
don't need to have the color codes explained, but I'm getting
forgetful due to my age and infirmities, and I need to remind myself!
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of ski
Francois,
The transmitter section of the MSR2000 station can be downloaded here:
A service monitor and a good analog VOM are all you need.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of
be able to get more information,
> once I know which board you have.
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com>
> [mailto:Repeater-Builder@yahoogroups.com
<mai
Skipp,
I should have mentioned that the applicable manual is LBI-30294, available
in full-page format here:
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Eric Lemmon
Sent: Sunday, September 13
watts, and all use the same transistors. I may be
able to get more information, once I know which board you have.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of skipp025
Sent: Sunday, September 13
To get the best performance, you should use Andrew LDF5-50 Heliax, which is
7/8" diameter, or larger. Anything smaller will suck up significant power
and reduce the amount of incoming signal, leading to poor coverage.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Bu
The MSF5000 service manual states that the correct test microphone is
HMN1001, which is still available from Motorola Parts for about $95. Call
800-422-4210 to order.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil
In my previous post on this topic, I neglected to identify "Linerless
Splicing Tape" as Scotch 130C. Here's more info on this great stuff:
<http://tinyurl.com/q6s9xz>
Scotch 130C and Super 88 tapes are available in several widths.
73, Eric Lemmon WB6FLY
-Origi
ot or similar
home-improvement stores, try a commercial electrical supply house. If
that's not convenient, go to 3M's online store and buy any Scotch product
made.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogro
Konstantinos,
First go to the Repeater-Builder Technical Information Pages (RBTIP) here:
Then scroll down to the Search box, enter "desense", and click the search
button.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:rep
Fred,
I think you are referring to the TLD1693E, which is the 100-watt,
continuous-duty PA for 150.8 to 162 MHz in a Micor station. It is covered
in this manual:
or here:
<http://tinyurl.com/l9jzjh>
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogrou
The latest version (October 2008) of Part 97 is available in the RBTIP,
here:
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of mwbese...@cox.net
Sent: Friday, September 04, 2009 9:51 AM
To
If it is so easy to use and works so well, I wonder why National
Geographic's editors don't know about it...
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of A.Tahir DENGIZ
Sent: Friday, Se
unted your DB224 antenna on the
roof of your equipment shed, directly above the repeater, so that the
repeater cabinet was in the "shadow" beneath the antenna. You might also
consider filtering the DC power leads to prevent RF ingress through that
path.
73, Eric Lemmon WB6FLY
-
Tim,
I believe you stated in a previous message that the antenna was 100 feet
away, horizontally. That is light years away from it being 100 feet ABOVE
the repeater.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil
ut I have neither the patience nor the inclination to
spend a lot of time and energy manipulating segments of schematics when I
can get a large page scanned in one pass for less than a dollar.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeat
heets (which are up
to 34 inches wide) and have them scanned directly to PDF and put on a CD or
thumb drive.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of R.K. Brumback
Sent: Tuesday, September 01, 2
about
$65.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of skipp025
Sent: Friday, August 28, 2009 3:07 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Motorola Desktrac Repeater
repeatedly mentions that the CDR700 cannot
meet FCC stability requirements for narrow band (12.5 kHz) channels on UHF,
but is silent on failing to meet FCC requirements for station
identification. However, it is not too difficult to install an ID-8 or
similar CWID device.
73, Eric Lemmon WB6FLY
at exciter leakage can occur if all of the shield plates are not
reinstalled, with every screw tight. There were also a few instances of
leakage from an exciter in one UHF station leaking into an adjacent VHF
station, since the UHF station uses a VHF exciter that is then tripled.
73, Eric Lem
es are. When you tested the duplexer at its original
frequencies before making any tuning adjustments, did it perform to factory
specifications?
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of kerinva
Mac,
Check to see if your radio is configured to require ignition sense. What is
the complete model number of your radio?
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mac McCullough
Sent
ite its appearance, it worked quite
well, and I learned to anticipate when the phone would ring by counting the
clicks as the Secode unit stepped.
I, too, would like to know the origin of the two-letter channel designators.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Build
just such
a commercial system almost 7 years ago, using the higher-power (25-50 watt)
R1225 and larger panels and batteries, and it ran 24/7/365 until just
recently when I upgraded to a 100-watt MTR2000 and a more powerful solar
system. The R1225 is now on standby as a backup system.
73, Eric L
trip to the mountain"
because I did not do my homework thoroughly.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Kevin Custer
Sent: Saturday, August 22, 2009 3:38 PM
To: Repeater-Builder@ya
.
In an ideal world, KJ4SI should be able to buy a four-cavity BpBr duplexer
and try it out for 30 days to see if it had zero desense- with the option to
purchase two more cans and the appropriate jumpers at a discount for
upgrading it to a six-cavity duplexer.
73, Eric Lemmon WB6FLY
-Origin
f feedline are irrelevant, since they have nothing to do with how the
duplexer performs with a 50 ohm dummy load connected. As always, YMMV...
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Tony
My CommShop calculates 99.65 dB is required. I'd definitely be looking at a
six-cavity BpBr duplexer for this station.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of kj4si
Sent: Saturday, A
l detail as possible. That's why
a one-step conversion (microfiche-to-PDF) is the ideal solution. I'm still
looking for the best solution.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of mmoss111
Don't bother finding another route! By congressional decree, Amateur Radio
is PART OF Homeland Security, and someone needs to educate those idiots at
City Hall. Go here for info:
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater
splitter that follows the amplifier will provide sufficient isolation
between receivers. No additional cavities are needed.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of kt...@ameritech.net
Sent
Tony,
I bought one of Chip's filter /preamp packages for my 220 repeater, a few
years ago, and it performs exactly as advertised- probably better.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Beha
Nope, Andrew LDF5 has a tubular copper center conductor. The cable in
question has a copper-coated, solid aluminum center conductor.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of gervais
Sent
Brian,
This may be a special product, made for the Department of Energy's Nuclear
Test Site in Nevada. It may be a version of Heliax, shown here:
http://tinyurl.com/km3jcn
It does require special connectors and preparation tools, which may be quite
expensive.
73, Eric Lemmon W
I plotted the repeater coordinates on the Kaufman USGS survey map, image
attached, and you can see that the location is very close to the
intersection of Highways 34 and 1388- not 20 miles away.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
questions about licensing or location of
transmitters should be directed to whatever person or company is shown as
the "Contact" on the license, which is:
Comtex Communications
Pat L Gardenhire
PO Box 977
601 Ferris Avenue
WAXAHACHIE, TX 75165
972-938-1980
73, Eric Lemmon WB6FLY
---
ducts is somewhat
limited.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP
Sent: Tuesday, August 11, 2009 4:16 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] U
assemblies for the
high-pass and low-pass cans are identical. Perhaps the previous owner added
capacitors because the tuning caps were damaged. Or maybe the loop
assemblies for a combiner were used in place of the correct BpBr loops. Are
the interconnecting cables the correct length?
73, Eri
, or that he is barely audible and needs
to speak up!
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Paul Plack
Sent: Sunday, August 09, 2009 10:10 PM
To: Repeater-Builder@yahoogroups.com
Subj
Martin,
The best place to get that information is from the company that built it.
Contact Sinclair Technologies at 800-263-3275.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of cruizzer77
Sent
satisfied customer. I have no financial
connection to the company.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey
Sent: Saturday, August 08, 2009 7:19 PM
To: Repeater-Builder
that the base stations
and/or repeaters are either reprogrammed or replaced just prior to that day.
If well-planned, this will work. Obviously, users with many mobile radios
will need to allow extra time for replacing them.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater
a bandpass filter may be tunable over the 430-450 MHz
range, but once tuned to a specific frequency will pass only a very narrow
band, just a few tens of kHz wide. If you really want to pass a 20 MHz wide
band, then you should use a preselector rather than a bandpass filter.
73, Eric Lemmon WB6FL
No, I have never used a Zetron 30 or an MSR2000.
Note that I have changed the subject line to match the new topic of
discussion.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of gervais
Sent: Friday
Gervais,
The unit name is actually spelled "DeskTrac" because it normally contains a
MaxTrac radio. A picture of a DeskTrac is on the RBTIP here, about halfway
down:
My DeskTrac weighs about 15 pounds.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoo
If you have difficulty opening the two files I attached, they are also
posted in the Files section of the Repeater-Builder Group site, along with
several other coaxial cable spec sheets.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater
a Pelican-style
case that measures around one cubic foot. The duplexer info is here:
I will write up a article about this project, once I have the time.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf
shield braids are different as well, with disparate numbers of ends and
picks per inch. Since they're small in size, I have attached the two spec
sheets as PDF files.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater
barrels in them.
You will be amazed at the improvement!
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of agrimm0034
Sent: Saturday, August 01, 2009 10:36 AM
To: Repeater-Builder@yahoogroups.com
Sub
Scott,
You can probably find the answer in the Kenwood service manual B51-3826-00.
It's available from www.wirelessrepairsandbatteries.com for about $17. I
hope you recover soon...
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater
Sinclair Q202 duplexers (frankenstein
series)
But the GE file shows how to make a quarter-wave open-stub filter, not a
shorted one.
Chuck
WB2EDV
----- Original Message -
From: "Eric Lemmon" mailto:wb6fly%40verizon.net> >
To: mailto:Repeater-Builder%40yahoogroups.com&g
device
are found here:
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Eric Grabowski
Sent: Monday, July 27, 2009 10:30 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder
that is using a 5.26 MHz split on VHF, and it works perfectly. I
specified it because of the antenna being the high point on the tower, and I
wanted DC ground at the duplexer for repeater protection.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[
ardly a "large" battery, since that rating is about 1/3 the size of a
typical car battery. Perchance, did you mean 260 Ah?
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301
Sen
the repeater at full quieting, so that any other user of
the repeater will easily capture it without interference. A production
model will probably be designed to connect directly to a controller or to a
portable or mobile radio for remote control. Stay tuned...
73, Eric Lemmon WB6FLY
-O
rts of notch
tuning capacitors that were destroyed by high-voltage arcing. This damage
would not be visible.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP
Sent: Sunday, July 26, 200
s sense to gamble on what may be factory
rejects.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Yahoo
Sent: Wednesday, July 22, 2009 11:25 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [
! The subject FSB cautions technicians to be patient
when upgrading firmware on all MotoTrbo radios, since disconnecting the
cables before the procedure is finished will leave the radio inoperative and
require that it be sent to the depot for repair. Read FSB10163 for the
details.
73, Eric Lemmon
o properly tune the duplexer with the appropriate
test equipment. The tuning info is here:
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of hbbcara
Sent: Saturday, July 18, 2009 5:48 PM
To: Repeat
at all. I have had
little success in using any of the aftermarket cables.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of afa5tp
Sent: Wednesday, July 15, 2009 7:50 PM
To: Repeater-Builder@yah
Scott,
I had no idea what a "3450" is, until I did some Google searching and found
that you probably mean a repeater once made by E. F. Johnson. If so, a
manual is listed for sale here:
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoo
eater.
73, Eric Lemmon WB6FLY
Norm,
That's really odd- the link works fine from both home and work computers.
Nevertheless, I have sent you the file directly.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP
reaching
their respective terminals without barrels or adapters.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP
Sent: Sunday, July 12, 2009 9:51 AM
To: Repeater-Builder@yahoogroups.com
Subject
able to achieve optimum tuning.
The factory-made harness uses Delta crimped connectors, and costs about
$250. If I were to do this again, I would consider fabricating the harness
myself, with genuine Delta tees, which can be purchased for a total of
around $120.
73, Eric Lemmon WB6FLY
-
mentioned are found in the Service Bulletin
section, here:
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jeff DePolo
Sent: Sunday, July 12, 2009 7:51 AM
To: Repeater-Builder@yahoogroups.com
-adjusted on
the TX side, and desense is almost guaranteed. When properly tuned, you
should see about 1.5 dB insertion loss on both RX and TX sides, and at least
80 dB isolation on each side. I'm curious: What test equipment are you
using to tune this duplexer?
73, Eric Lemmon W
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