At 06:50 PM 01/24/08, you wrote:
I've been searching for a very simple circuit that could turn on a,
maybe, 10 watt resistor at 12 volts, when the temperature drops to
perhaps 30F or so. Anyone have a reliable favorite?
Laryn K8TVZ
Use a simple heating thermostat, available at Home Depot. Have
On Thu, 24 Jan 2008 [EMAIL PROTECTED] wrote:
I can't imagine why you'd want to go to the trouble of building a
GMRS repeater.
It's for the education, experience and pride in putting something
together and getting it to work. It also for ththe frustration and
fun that goes along with it.
How are you checking for desense? Are you using an isolated T between the
duplexer and antenna line and doing the same when measuring desense on the
dummy load?
Are you measuring site noise? Do this the same way you would measure desense
with the isolated T in the line. But first see what the
As they say... stuff happens. (or words to that effect) :-)
Joe M.
WD7F - John in Tucson wrote:
Yeah, I misread the post and my brain looked at 110 and recorded 210. The
110 is an old controller. So, it was
Duh!, I'm an idiot! It has something to do with being 67, I'm sure.
de WD7F
Just so we're singing from the same page, a few comments first.
Pointing the dipoles all in one direction, for instance, increases the
gain of a DB224 from 6dbd to 9dbd in the favored direction. And off
the *back*, there is still a gain of 3dbd. It has a front-to-back
ratio of 6db. Useful, but
Taking your idea a step further, it would be interesting how 3 real beams, fed
with a power splitter, would work in this case.
There was an article on this many, many years ago about mounting an array of
vertically polarized mounted beams (5-6 element I think in pairs) each pair
fired
This question has initiated an interesting exchange of ideas. Many
good suggestions have been provided.
The fact that the desensitization exists when operating duplex on
either of two antennas, or when using split antennas, combined with
the results of the other tests [minimal desensitization
I think you may have overlooked the fact that desense was observed even when
a dummy load was connected directly to the output of the duplexer. That
pretty much eliminates anything external to the repeater itself, doesn't it?
73, Eric Lemmon WB6FLY
-Original Message-
From:
Just make sure to pull the unused loop out of the cavity.
Steve / K6SCA
Gary Schafer [EMAIL PROTECTED] wrote:
If you have an extra band pass cavity then you also have a notch
cavity. Just connect a T to one port of the band pass cavity and ignore the
other port on the
If you have an extra band pass cavity then you also have a notch cavity.
Just connect a T to one port of the band pass cavity and ignore the other
port on the cavity. This will work as a notch cavity for your testing.
73
Gary K4FMX
_
From: Repeater-Builder@yahoogroups.com
Yeah, I misread the post and my brain looked at 110 and recorded 210. The
110 is an old controller. So, it was
Duh!, I'm an idiot! It has something to do with being 67, I'm sure.
de WD7F
John in Tucson
- Original Message -
From: MCH [EMAIL PROTECTED]
To:
One issue may very well be the insufficient isolation considering the TX
power level. If you really want to run that much power I'd highly recommend
having bandpass filter(s) between the PA and the duplexer - this will help
reduce broadband noise from the PA. Bandpass filter(s) between the
Stu,
It looks to me as if you have covered almost all of the bases, and have
eliminated every one of the typical causes of desense. However, there is
one possibility that has not been mentioned: Leakage inside the Micor
radio.
Even with a careful duplex conversion, there are several sneak
That was my first thought, too.
But, when someone talks about the dead RC110 group, and you post that
you are receiving mail fine from the RC210 group, I guess I'm just too
much of an idiot to connect the dots of relevance.
Maybe you could do that for me? What does the RC210 group
have to do
It should not matter what direction(s) they are pointed in. As you said,
they can be changed from omni (all 4 directions) to all in one direction
without changing anything else. It's all the same antenna.
You can point two in one direction and the other two 90 degrees off
those and leave a null
--- Eric Lemmon [EMAIL PROTECTED] wrote:
Stu,
I think 250 watts is far too much power for that
duplexer to properly
isolate. Try running just your exciter, or try no
more than 30 watts or so.
My 220 repeater runs just 18 watts, and it is almost
perfectly balanced. I
am using the same
Stu,
I think 250 watts is far too much power for that duplexer to properly
isolate. Try running just your exciter, or try no more than 30 watts or so.
My 220 repeater runs just 18 watts, and it is almost perfectly balanced. I
am using the same Telewave duplexer, and I have zero desense.
Yeah, he says the group has been dead for sometime. Anyway I cancelled the
request.
On 1/25/08, WD7F - John in Tucson [EMAIL PROTECTED] wrote:
Ken Arck - AH6LE
de WD7F
John in Tucson
- Original Message - *From:* Jim Brown [EMAIL PROTECTED]
*To:* Repeater-Builder@yahoogroups.com
Ken Arck - AH6LE
de WD7F
John in Tucson
- Original Message -
From: Jim Brown
To: Repeater-Builder@yahoogroups.com
Sent: Friday, January 25, 2008 8:36 AM
Subject: Re: [Repeater-Builder] RC110 Group
I tried to join several times a couple of years ago, and was refused by the
That's kind of a harsh statement! I know more GMRS users that are hams than are
not. Many of us use GMRS so we can get others such as family members on the
air and maybe they'll get interested and get a ticket. Others may know enough
but simply have no desire to become hams. Many users are
Thanks, Paul, and all others for the replies. Still looking for that common
sense. Let you know when I find it.
Matt
- Original Message
From: Paul Finch [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, January 24, 2008 8:20:13 PM
Subject: RE: [Repeater-Builder]
There are certainly exceptions but most people I know who do GMRS
didn't know enuf to pass a ham test -- which is the reason for my question.
The Desktrac is 40 (pardon my typo)
73
Jack
Kris Kirby [EMAIL PROTECTED] wrote: On Thu, 24
Jan 2008 [EMAIL PROTECTED]
TRY: http://home.comcast.net/~msr2000/
or Panik Electronics
In Repeater-Builder@yahoogroups.com, hapgriffin01 [EMAIL PROTECTED]
wrote:
I'm looking for a 100.0 Hz Vibrasponder for a MSR-2000 PL Module
TRN5075A. Can anyone help?
Hap Griffin
WZ4O
The 210 group is different than the 110 group.
Joe M.
WD7F - John in Tucson wrote:
Really? I get mail from [RC210] rc210 at yahoogroups.com every day.
Wonder what that's about.
- Original Message -
From: DCFluX
To: Repeater-Builder@yahoogroups.com
Sent: Friday, January 25,
I have a question about the DB base antennas such as the DB-224, DB-
420, etc. As most of you know they consist of folded dipole trombones
mounted on the mast at 90 degree angles with a phasing harness to
create a omnidirectional pattern. I have heard of pointing the
trombones all in one
Really? I get mail from [RC210] rc210 at yahoogroups.com every day. Wonder
what that's about.
- Original Message -
From: DCFluX
To: Repeater-Builder@yahoogroups.com
Sent: Friday, January 25, 2008 11:27 AM
Subject: Re: [Repeater-Builder] RC110 Group
Yeah, he says the group has
Couple of thoughts from one who is not to technically oriented. 1. Have you
tried putting any notch filters between the duplexer and rcvr. to notch the TX
freq. ? 2. Have you checked all of your cables and heliax connecters for
proper installation ?
I only ask this because I was having
Hey Jeff:
I think there are some out there that might question agita. Haven't
heard that term in a while (and don't want to have it).
Ciao, Tony
Jeff DePolo wrote:
We have a 222 MHz repeater comprised of a converted Micor
mobile, Telewave TPRD-2254 BpBr duplexer, AM-6155 PA modified
for
I have a CR1010 repeater that needs to have new crystals installed to
change the frequency from 451.200 to 451.250 on the TX and 456.200 to
456.250 on the Rx. I tried to get crystals from EF Johnson and they
said they no longer support this repeater. I then tried to get
crystals from
I think the desktrac is 49w The Ritron is 7 or 8 which is more than enough
for here.
wd8chl [EMAIL PROTECTED] wrote: Jack Hayes
wrote:
I can't imagine why you'd want to go to the trouble of building
a GMRS repeater. Two years ago I purchased a Motorola
According to my second sentence it is more the rule than the exception. I have
said enough, I wish you the best! 73's.
-- Original message --
From: Jack Hayes [EMAIL PROTECTED]
THERE ARE CERTAINLY EXCEPTIONS
[EMAIL PROTECTED] wrote:
We have a 222 MHz repeater comprised of a converted Micor
mobile, Telewave TPRD-2254 BpBr duplexer, AM-6155 PA modified
for class C operation at 250W, and a DB-264JJ antenna at 80
ft. fed by 1/2' Heliax on a commercial FM broadcast tower .
With the duplexer terminated into a load, we
Motorola did'nt make a TRN 5075A transponder...
Their numbers go from: 5073A to 5076A
.
.
In Repeater-Builder@yahoogroups.com, hapgriffin01 [EMAIL PROTECTED]
wrote:
I'm looking for a 100.0 Hz Vibrasponder for a MSR-2000 PL Module
TRN5075A. Can anyone help?
Hap Griffin
WZ4O
Our group has substantial technical knowledge and experience, but we've been
just about beaten down by a problem with our repeater. A brief overview of
our situation follows.
We have a 222 MHz repeater comprised of a converted Micor mobile, Telewave
TPRD-2254 BpBr duplexer, AM-6155 PA modified
THERE ARE CERTAINLY EXCEPTIONS
[EMAIL PROTECTED] wrote: That's kind of a harsh
statement! I know more GMRS users that are hams than are not. Many of us use
GMRS so we can get others such as family members on the air and maybe they'll
get
Call Quadratics, (850)862-9333 ask for Bob Kernen, W4MTD. They are an EF
Johnson dealer. He may be able to help you.
In a message dated 1/25/2008 7:31:06 AM Central Standard Time,
[EMAIL PROTECTED] writes:
I have a CR1010 repeater that needs to have new crystals installed to
change
I was describing the many bandwidth options offered in many new PC programmable
commercial two-way radios today.
Maybe we're looking at two different things but I see GMRS channels as 12.5Khz
apart from each other. Channel one for example is 462.5500 where channel two is
462.5625.
Gary
Thanks for all of the replies, I believe we have found one and are
working to obtain it.
Dan
KA8YPY
Yahoo! Groups Links
I tried to join several times a couple of years ago, and was refused by the
moderator. My RC110 has been back to Ken Arc and was returned still
unreliable. It will ocationally do a reset while you are trying to enter a
macro, and will ocationally fail to turn on the audio to the link when it
John,
I suggest that you send the holders, with the old crystals, to International
Crystal or to any competent crystal house. Simply instruct ICM to change
the TX and RX from the existing frequencies to the desired new frequencies.
It'll cost you about $100 for the pair, but you'll wind up with
The GMRS full power channels are 462.550, 462.575, 462.600, 462.625,
462.650, 462.675, 462.700, 462.725. Deviation is +\- 5KHz. Power output 50
watts + antenna gain, if any.
The interstitle channels like 462.5625 are used by the FRS
kiddie-talkies. 500mW power, +\- 2.5KHz deviation, no
Thanks to everyone for the replies so far. Please see comments embedded
below. I think that they address most of the comments, questions, and
recommendations posed by all to this point.
If you suspect IMD between the channel 12 DTV transmitter and your Tx
carrier, work on attenuating the DTV
Any chance you can connect a spectrum analyzer to the duplexers receieve
port? Make tests to look at the IF range and the receiver range with and
without the transmitter active.
This will tell you alot.
For example on a 2m repeater we had a dirty SMPS in the vicinity of the
antenna that
Duh !
- Original Message -
From: MCH [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Friday, January 25, 2008 3:13 PM
Subject: Re: [Repeater-Builder] RC110 Group
The 210 group is different than the 110 group.
Joe M.
WD7F - John in Tucson wrote:
Really? I get mail
44 matches
Mail list logo
