I converted a UHF Mitrek for full duplex packet operation once. Don't
recommend it because the Mitrek rx and
tx are on a single board which results in transmit chain spurs and harmonics
getting into the rx. The task required
a spectrum analyzer and several hours experimenting with various
Use an outdoor crapper and hang an Out of Order sign on it.
Jack - N7OO
- Original Message -
From: kg2bv
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, March 27, 2010 5:55 AM
Subject: [Repeater-Builder] Outdoor Pole or Wall Repeater Cabinet - Weather
Resistant
A gain J-pole has extra element(s) separated by a phasing network.
Google has several hits for Super J-Pole and perhaps the best
I found is at:
http://rbsfm.ej.am/joomla/index.php?option=com_contenttask=viewid=43Itemid=26
which goes into more detail.
The design I used was publicized many years
It's been awhile for me as well but upon inspection it
was found to have a circular crack around the decoupling
assembly. This was silver soldered and put back into
service. However as the antenna was top mounted, over
time the noise returned due to flexing at the base.
Our ultimate solution
Actually it's not impossible to determine the source of kerchunking but it can
be
expensive and time consuming. Every repeater SysOp should consider having
a doppler DF capability to aid in locating the source of malicious interference.
Jack - N7OO
- Original Message -
From:
While the subject matter is off topic it does deal with propagation
issues. I'm some 70 miles S. from the Mt. Bigalow Tucson TV
tower that is shared by most of the Tucson DTV stations. A neighbor
with a simple looking Ebay antenna gets all the stations reliably.
On the other hand, I've put up an
Maybe I'm in the minority, but my experience with Magicjack has not been good.
Echoes or stutters. I've checked and adjusted my PC for optimum performance.
Quality
checks with recommended servers yields good results but 75% of the time I get
echoes
that vary from minor to severe.
73 de Jack
, etc?. The big question is what did you do to
modify the coupling loops?
73, Dale in Memphis-
-- In Repeater-Builder@yahoogroups.com, Jack Taylor [EMAIL PROTECTED]
wrote:
I once cut down 4 VHF cavities for a BP/BR 222 duplexer. Fairly
straight forward but
probably not worth
I once cut down 4 VHF cavities for a BP/BR 222 duplexer. Fairly straight
forward but
probably not worth the labor involved.
Jack - N7OO
- Original Message -
From: k0jxi
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, August 03, 2008 4:38 PM
Subject:
Guy's, anyone know what the current hourly wage that tower maintenance types
charge?
73 de Jack - N7OO
Far as I'm concerned there's no need to jam the airways with mind-numbing
content from every hamlet. A few
regional advertising supported Ku band satellite channels should suffice. This
would free up a LOT of
spectrum.
73 de Jack - N7OO
- Original Message -
From: Ben
To:
My tower blew over in a recent storm. Am having trouble locating pricing for
the equivalent Stationmaster
antenna. Pointers appreciated.
73 de Jack - N7OO
In our area, monitor 5-6 repeaters and with an area ham population of an
estimated 700, the
repeaters are used much less than 10% during a 24 hour period. This includes
linked systems
and IRLP/Echolink nodes. 20 years ago the chatter was higher. These days the
primary use are
by a few
Just as a suggestion, I would try stabilizing the rod temporarily and, with the
assembly put back
together tap on it to see if the problem is still with you.
73 de Jack
- Original Message -
From: Paul N1BUG
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, October 24,
To add to Nate's comments, prospective D-Star system builders
might coordinate with one of their local MARS services. MARS
is currently proposing to partner with the ARRL in providing
emergency communications support and an opportunity to
have assistance in setting up a D-Star system should be
Donno about UHF radials but I've fabricated my own for the VHF Stationmasters.
If you
are unable to locate the desired fitting you may be able to use a UHF double
female
barrel adaptor on the UHF male at the antenna and then use a UG-83 adaptor
(which is
a UHF male to type N female). I
PL access is a useful tool when all other means have been taken to get
rid of undesirable audio artifacts on a repeater. Usually this includes
harmonious
coordination with the other users at a site and a knowledgeable technical
approach to the problem.
All to often though, mandatory PL is just
- Original Message -
From: Ron Wright
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, July 29, 2007 3:55 PM
Subject: Re: [Repeater-Builder] Re: 4 meters
.Washington can give direct support to a mission 10,000 miles
away.
And that's the problem!
Jack - N7OO
73, ron,
Depending upon the wind loading on the tower, I would be cautious about
fastening *anything* to the fascia board of a modern day house! If your
tower
is self supporting, design the base to handle the load. Don't rely on the
house
else over time you may end up with cracks in the interior walls.
Pricegrabber.com reveals a couple dealers selling the GPS76 for under $151.00
delivered.
Jack - N7OO
- Original Message -
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, July 08, 2007 8:46 PM
Subject: RE: [Repeater-Builder] GPS Navigational
Here's some info on the Astron RS-35 as found on the CAP web page:
https://ntc.cap.af.mil/
Jack - N7OO
- Original Message -
From: Eric Lemmon
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, June 10, 2007 9:42 AM
Subject: RE: [Repeater-Builder] Astron RS-35 Perplexed
Dave, I wasn't able to google 'radioprogramming2' with any success. Could you
send a copy
of the MVS software to
[EMAIL PROTECTED]
Thanks,
Jack - N7OO
- Original Message -
From: Dave Cochran
To: Repeater-Builder@yahoogroups.com
Sent: Friday, May 25, 2007 7:28 AM
Are there plans on the web for using garage door systems to operate gates?
Remember, the gate
may have to be modified to work with the garage door opener. One can find
similar systems at
Home Improvement centers in the $500 - $1,000 range, depending upon the gate
style. From a security
On the one's I've removed, there wasn't a need to use a torch. Just remove the
screws at the top and
bottom and pull from the base. When finished examining the removed assembly,
it should slide back
together without too much fuss.
Jack - N7OO
- Original Message -
From: Paul
I've restored radomes on several Stationmaster type antennas that have started
to unravel by
applying a generous coat of Wal Mart exterior latex semi-gloss white. Have
held up for
5-6 years now in the Aridzona desert.
73 de Jack - N7OO
- Original Message -
From: Paul Metzger
I really can't speak for their repeater capability but I'm currently
troubleshooting an MVS
here. It's a nice compact radio but suspect it wouldn't hold up well in a
dense radio
environment due to the rather minimal shielding in the receiver section. The
40 watt
PA isn't shielded at all,
Jim, I have a couple of Q202G's that most likely could be restored. Would
appreciate
a copy of the manual.
73 de Jack - N7OO ([EMAIL PROTECTED])
- Original Message -
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, April 22, 2007 9:39 AM
Subject:
Along with a custom built repeater project, how about a custom built basic
service monitor?
The $1500 and up used/new service monitors are a necessity for those in the
business but
for those who only have a need to tune an occasional radio, a less expensive
tool would be nice.
Any suggestions?
I suspect the accuracy of the deviation measurement depends on how the scope is
calibrated.
I too have for many years used a scanner as a pseudo service monitor. I have
used both
a calibrated FM signal generator and the local public service channels for
reference. The DC
coupling of the scope
My observation with VHF stationmaster type antennas is if they don't have a
support strut, wind motion
eventually causes the base decoupling network to crack which, in turn,
causes a discontinuity that
creates noise. The antenna can be disassembled and re-welded but eventually
the problem will
A little bit off-topic perhaps but perhaps not. What brand and model label
makers are
preferred by those that label their wiring? I would prefer something
inexpensive as it
wouldn't see much use once the cables and wiring is labeled.
73 de Jack - N7OO
Situations are different for different situations :-) Let me recount one
experience. A local club
was using a Micor mobile for a VHF repeater. Worked fine until the call sign
needed changing.
About the same time a new maintenance tech took over and declared the Micor as
junk (this
after he
My PD catalog just lists a PD-220, no other designator. Says bandwidth is 9
MHz and true
omnidirectional gain in excess of 5 dB. They are supplied in three frequency
ranges across
136 - 174 MHz. To verify the frequency range you will have to sweep it.
Jack
- Original Message -
I get a HTTP 404 Not Found response for www.bosshardradio.com
Jack
- Original Message -
From: Steve Bosshard (NU5D)
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, February 21, 2007 7:03 AM
Subject: Re: [Repeater-Builder] G.E.MVS Serice Manual
in the right direction on this so maybe I can
set somemore repeaters where that are very needed.
--- In Repeater-Builder@yahoogroups.com, Jack Taylor [EMAIL PROTECTED]
wrote:
On the other hand Jim, the Syntor X's are a newer radio with less
chance of component
failure. The 100
On the other hand Jim, the Syntor X's are a newer radio with less chance of
component
failure. The 100 watt VHF drawer units can be picked up for $10.00 at swapmeets
and if you have an eeprom burner you can program them yourself for an
investment
of $20.00 for the two radios. Even if you have
On the other hand, I need to join in here. True it seems like everyone has a
cell phone glued to their
ears these days. But from the ham radio aspect, cell phones aren't nearly as
attention consuming as
setting up your mobile whilst driving! Many times I've swerved dangerously all
over the
I don't have experience with the TOP2004, but did order a Genius NSP serial
port programmer
off Ebay about a year ago. When received, I found the manual to be next to
useless and
the seller subsequently disappeared. Although the menu indicated it would
handle a number
of file formats, I was
If anyone is still interested in a GE 4CX250 VHF amp, contact John K8YSE at
[EMAIL PROTECTED] as he has one or more he'd like to see put into use.
73 de Jack - N7OO
Other possible cavity materials would be beer kegs or 55 gallon barrels.
73 de Jack - N7OO
- Original Message -
From: Mike Morris WA6ILQ
To: Repeater-Builder@yahoogroups.com
Sent: Monday, December 25, 2006 4:43 PM
Subject: Re: [Repeater-Builder] Re: 6M cans made from other
Does anyone know if the receiver preamp in the high VHF Syntor X will work
without
modification at 144 MHz? If not, what needs to be changed?
73 de Jack - N7OO
- Original Message -
From: Jack Taylor
To: Repeater-Builder@yahoogroups.com
Sent: 12/9/2006 5:31:36 PM
Subject: [Repeater-Builder] Syntor X receiver preamp?
Does anyone know if the receiver preamp in the high VHF Syntor X will work
without
modification
Either *should* work. You would have to consult the data sheets but as I
recall the
C version is CMOS, perhaps a little less current draw and faster operation.
73 de Jack - N7OO
- Original Message -
From: Mike Reed
To: Repeater-Builder@yahoogroups.com
Sent: Friday, November
Anyone have an extra service manual for a Syntor X VHF T73VBJ or T73VXJ? Or,
pointers on servicing
the VCO?
Jack - N7OO
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