Hi All,
I have what I believe to be a Tait CTCSS unit.
The numbers on the baord are 225-00011-41B.
I know it is a 2 channel CTCSS unit, as it has two pots on it.
I can work out which wires are the +12v and ground, but I do nmot have any
information on what the other 10 connections points are.
Hi Kevin,
Sounds like you have a CTCSS board from a Tait T500. These are a specialty item
and are probably more hassle to interface to a third party device.
Regards
_
Gareth Bennett
This email is confidential, if you received
Hi Gareth,
Thanks for that, I was hoping to fit it into a T300 RX, we are getting some
interferance on one of link freq, from what we think is a in-home TV
Transmitter.
Going CTCSS would be an easy fix.
Thanks
Kevin.
Get Skype and call me for free.
- Original Message -
From:
Give me a reminder email on Monday and I'll have a look to see if there are
some old CTCSS decoders at work floating around like somthing from SALCOM that
would suit the T300 for you.
Cheers
_
Gareth Bennett
This email is
If the load, antenna, were not 50 Ohm resistive and connecting it caused
the duplexer to become untuned then tuning it with the load would make
very much RF since. Tuning it with a dummy load is only done to insure
a good load, but is not tuning for the real situation.
However, in this
Eric,
I agree often the wording on cable, and other things like drugs,
batteries, etc, are ment to mislead.
On my RG223 it says NETWORK CABEL 7725 TYPE RG223. I does have double
copper shield. I had thought it had stranded center cond, but it is
solid, looks like maybe #22 copper with
Paul,
This length always leads me to telling Hams that the 17 ft Comet does
not have the 8+ dbd gain the package says. An antenna 44 ft long to get
the 9-10 db gain from a very professional company with years of
experience and now someone is going to make same in 17 ft package.
Doubling
I ment to say Our local EDACS system is all analog for found the
DIGITAL did not perform nearly as well. Of course the radios going
from $2400 for analog to $3300 for digital did not help. The new
versions are even more.
73, ron, n9ee/r
Ron Wright, N9EE
727-376-6575
MICRO COMPUTER
Jeff,
I think the LMR400 is a double shielded with each shield different
metals. One braid and one foil. This is a no-no for duplexed repeaters
for the higher TX RF will generate noise getting into receiver. I
recommend at least 1/2 heliax. Know cost, but well worth the cost.
7/8 even
--- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote:
Hello all from Adam Kb2Jpd
One point some may be missing is that we should not continue to tie up
precious spectrum just so we can continue to use old repeater
technology.
We have a mandate for expiermentation.
in the
Since in some instances D-Star is an add on board, I wonder why ICOM
wouldn't do the same thing for a P25 add on board?
On May 9, 2008, at 9:52 PM, Ron Wright wrote:
At $250/P25 radio is more like the D-Star price although they are
user programmable. At $2500 it would be a very very hard
Thanks Mike. Yes, the S-AV15 is used in my MICOR 220 repeater. What I am
looking for is a regular data sheet that and the curve that shows the power
output vs the control voltage. None of the sites I have found and yours do
that. Thanks again.
Mel, K6KBE
- Original Message
From:
At 5/10/2008 04:36, you wrote:
Paul,
This length always leads me to telling Hams that the 17 ft Comet does not
have the 8+ dbd gain the package says.
I don't recall the package saying dBd, but their website clearly indicates
8.5 dBi @ 146 MHz.
BTW, I measured the gain of the GP9 @ 440 MHz
Dang, must have misread something. Was in a hurry, link below
Paul
HYPERLINK
http://www.ke3ht.org/14691/specsheet_220-2n.pdfhttp://www.ke3ht.org/14691/
specsheet_220-2n.pdf
_
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Laryn Lohman
Sent:
By the way, I was admitting I made an error reading the gain. I think I
transposed the 9 MHz bandwidth with the gain, my error.
Paul
_
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Paul Finch
Sent: Saturday, May 10, 2008 11:00 AM
To:
Hi Tony,
Tony VE6MVP [EMAIL PROTECTED] wrote:
Folks
We're moving a VHF MSR2000 repeater and two UHF GMR300 linking
radios to a site where commercial power will cost $5000 plus
monthly fees. So we're looking at various options such as solar,
wind and so forth. The land owner might not
Funny you should run into this problem... another group member
and I have been talking about pretty much this same strange
problem in regards to his extra set of Wacom Duplexer Cavities.
He exhausted a number of serious RF test examples to his
problematic Wacom duplexer as a package and as
I think the LMR400 is a double shielded with each shield
different metals. One braid and one foil. This is a no-no
for duplexed repeaters for the higher TX RF will generate
noise getting into receiver.
Just to be clear...
The dissimilar shield metals is the potential problem source,
Which begs the question: Why are antenna manufacturers and vendors still
using dBi to express gain for antennas operating at VHF? The term dBi
represents gain of an isotropic (point-source) radiator such as an antenna
with a parabolic reflector; it is inappropriate to use dBi for a dipole
Aluminum gives directivity and pattern - GAIN comes from EIMAC.
I suspect manufacturers like bigger numbers - makes hams think they
are getting more - I often ask the question of how a commercial
antenna (DB304) can cost over $1000 and a higher gain ham quality
antenna less than $100 - something
At 05:11 5/10/2008, Ron Wright wrote:
At 122 ft HAAT you can get 30 miles to a mobile, but this is
assuming flat terrain. To an HT not unless one is on a mountain or
air plane, hi.
I routinely hit the Mt Vaca repeater (2m, 2900ASL) from a hilltop
(780ASL) 50 miles away. Most of the
If you're hitting the 195 Vaca Repeater it probably has a
number of active voting receivers in operation.
If you're talking about the 147.000 Vaca Repeater... it normally
has a single mountain top receiver.
The 145.470 Vacaville Repeater can be operational using various
combinations of
Steve Bosshard wrote:
Aluminum gives directivity and pattern - GAIN comes from EIMAC.
Now THIS guy knows his stuff.
4CX250R (Eimac) and 2 metersYea!
I've been interested in a service monitor with spectrum and tracking
for some time. Now I'd have the possibility to get an IFR 1900 CSA for
$1200, the problem being that power meter and am modulation fail the
self test. The plus points I see in this unit are that it's not too
old and it seems to
Does anybody know what microphones fit a Kenwood 231
and 241 ?
I'm helping a couple of folks locate parts to resurrect a
semi-abandoned city EOC. There are two 231 radios
and one 241 radio involved.
Does anybody have schematics? All we need to make work
is PTT and mic, we don't need DTMF or any
this brings up a couple of questions.
first, what type of transmitter were you using.
Second, how well was it shielded?
A Mastr II station would not be as likely to come up with such a problem
as long as the normal shielding was not defeated.
I can't comment on batwing stations, as I
Hello,
I will have a high band Motorola 100 watt repeater and a GE 100 UHF
repeater, both complete with duplexers for sale at Dayton this year. I will
also have several other base stations suitable for framing into a repeater.
I will be in spaces 903 and 904.
Paul
WB5IDM
No virus found
Mike,
just about any of Kenwood's hand mics with DTMF and the circular 8-pin
connector will work fine on those radios including but not limited to
the MC-43's and MC-53's. The original mics for both were the teardrop
shaped MC-43's which, by the way, sound a bit better on TX than the
backlit
One of the few boxes that goes 1296 and beyond. Don't know how much
support you can get from AEROFLEX or Cardinal Electronics. Nice box -
is more a cell site test unit than a service monitor. I have both an
8921, 1900, and 120B. The 8921 rides with me all the time. Steve NU5D
cruizzer77
At 04:16 PM 2008-05-10 +, skipp025 wrote:
Well... you're going to need deal with snow? In your location on
gray winter days you're probably talking less than 20% to 30% of
the summertime solar energy from most solar arrays (on a good day
with a tail wind).
I thought solar cells were only
--- In Repeater-Builder@yahoogroups.com, Kevin Custer [EMAIL PROTECTED]
wrote:
Steve Bosshard wrote:
Aluminum gives directivity and pattern - GAIN comes from EIMAC.
Now THIS guy knows his stuff.
4CX250R (Eimac) and 2 metersYea!
Yeah 8877 Now your talking
At 5/10/2008 10:16, you wrote:
Which begs the question: Why are antenna manufacturers and vendors still
using dBi to express gain for antennas operating at VHF? The term dBi
represents gain of an isotropic (point-source) radiator such as an antenna
with a parabolic reflector; it is inappropriate
Actually, it's the other way around. The isotropic radiator is what's
theoretical. The TIA-329-C standard provides instructions for creating a
real-world reference dipole radiator, upon which real-world measurements can
be based..
There are many antenna experts who disagree with some of Cebik's
Tony VE6MVP [EMAIL PROTECTED] wrote:
I thought solar cells were only 10-15% efficient on cloudy
days? And days up here are about one to two hours shorter
up here in winter compared to you folks in the Pacific NW.
Although you likely get a lot more cloudy days than we do.
There is no
A CPU I use devides the crystal by 12 and with a 3.58 MHz xtal this
becomes about 300 kHz and of course with lots of harmonics. I simply
changed the crystal to 4.x MHz and fixed the problem. DTMF
decoder/encoders that use a typical 3.58 crystal do not cause this
problem. Did not affect
At 5/10/2008 17:58, you wrote:
Actually, it's the other way around. The isotropic radiator is what's
theoretical. The TIA-329-C standard provides instructions for creating a
real-world reference dipole radiator, upon which real-world measurements can
be based..
There are many antenna experts who
Sometimes figure out what the 41st harmonic of the color burst crystal is
and why a handheld or a scanner can't listen to the 146.76 repeater.
At 06:46 PM 05/10/08, you wrote:
A CPU I use devides the crystal by 12 and with a 3.58 MHz xtal this
becomes about 300 kHz and of course with lots
I think what ever standard, dbi or dbd, one can interupt the
differences. The main problem is the number in front...is it real.
Most Ham antennas it is not and only db should be stated and can be
interuped as dbwn...db with respect to a wet noodle :)
I prefer the dbd just because it give a
I think the difference is 2.1 dB.
Joe M.
I think what ever standard, dbi or dbd, one can interupt the
differences. The main problem is the number in front...is it real.
Most Ham antennas it is not and only db should be stated and can be
interuped as dbwn...db with respect to a wet noodle
Go to the microphone connection page
http://homepage.ntlworld.com/rg4wpw/date.html
Ron
Gary wrote:
Mike,
just about any of Kenwood's hand mics with DTMF and the circular 8-pin
connector will work fine on those radios including but not limited to
the MC-43's and MC-53's. The
Ron,
Well said, and I think almost every Ham would agree with you. The
difference between dBd and dBi is (generally) about 2.14 dB. Some
manufacturers of commercial-grade antennas, such as Celwave, Andrew, and
Sinclair, already make a clear distinction by expressing gain in dBd as the
primary
Mike,
The TM241 uses a MC-44 mike. The MC44DM has the DTMF pad. My 241a mike
had no model on it.
Try http://www.universal-radio.com/catalog/fm_txvrs/TM241A.html for info
on the 241. It has long been discountinued. I use mine for packet.
73, ron, n9ee/r
Ron Wright, N9EE
727-376-6575
--- In Repeater-Builder@yahoogroups.com, Paul Finch [EMAIL PROTECTED]
wrote:
By the way, I was admitting I made an error reading the gain. I think I
transposed the 9 MHz bandwidth with the gain, my error.
Paul
I appreciate the admission Paul. I always try to keep an open mind
though.
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