[EMAIL PROTECTED] wrote:
At 2/11/2006 19:49, you wrote:
Bob Dengler wrote:
Where was their web police last FD when we had a simplex IRLP node
with a
broken RX connected to a reflector TXing all day on 223.50 the reflector
admin refused to disconnect it? Quite a mess that was.
Who did
Thanks Jeff for taking the time to do some pretty detailed research. The
results seem right in line.
In real life the effective sensitivity will be somewhat less due to external
noise sources. I usually will terminate a system into a dummy load and take
a relative isolated tee measurement, then
I wonder if the West Mountain Radio Computerized Battery Analyzer, CBA II
could be somehow used as a load bank for power supply testing?
http://www.westmountainradio.com/CBA_ham.htm
73, Joe, K1ike
[EMAIL PROTECTED] wrote:
Re variable power supply load. Info should be in archives
Here is my version of a 12 Volt dummy load:
http://astron.w4zt.com/dload.html
And, for those of you that are like me and would like to load test HIGH
VOLTAGE supplies, here's my high voltage dummy load:
http://gs35b.com/hvload/index.html
Careful... either of them can burn you... BAD. The
I do. However I mentioned that to one of the West Mountain Radio guys at a
flea market and he sounded a little concerned that there might be some
possibility of an oscillation between the regulation loops in the CBA vs.
the one in a power supply. I haven't observed that, but I do tend to put a
Title: Message
I'm
almost sure it does, as I've used those connectors before on either Andrew or
Cablewave 7/8" foam. If you have an older Tessco catalog (say, from 3 or 4
years ago), I'm pretty sure they had a chart in there that showed which
connectors work on which cable. Most of the
I still contend that in a mobile environment, under motion, that the
user will not detect the 6 dB difference. It will be barely
distinguishable most of the time.
I'm not arguing this point. There have been times when I've had a 75 watt
Micor PA die and I've had to run the output of the
Another repeater in the area had a DB224 mounted about 2'
off the side of a smaller tower about 400 ft up with thedipoles
arranged omni with reasonablecoverage. They went out to about 4'
off the side and pointedthe dipoles in towards the tower inline.
Performance dropped drastically,
I picked up an electronic load on Ebay a number of years ago, and have
gotten more use out of it than I ever thought I would. Here's a well-done
article on building an electronic load. The general design could be easily
expanded to handle higher current by using a beefier transistor and/or
Jeff,
Yes. I have a VHF system using Andrew LDF5-50 Heliax
with Eupen connectors, and also a UHF system using Eupen 7/8 feedline with
Andrew Heliax connectors. No problems, either with the connector
installation or the longterm performance. Be careful to follow the cable
preparation
At 2/11/2006 19:50, you wrote:
OK, here are the results of my quick bench measurements for whatever it's
worth.
MOBILE RECEIVERS
Kenwood TM-V7A (my most-hated radio): -125.0 dBm (0.13 uV)
1.3 dB to 6.6 dB. Personally I'd argue that the TM-V7A should be
disqualified too; it
Did you try the V7A with AIP on?
No, I didn't, but I'll do that later today if I get a chance. The other ham
rig in my truck is the other Kenwood dual bander (TM-708? getting old and
don't remember model #'s like I used to). I'm not sure but I think that has
the AIP function too. I never
Jeff, Kevin, Mike and others
Thank you for your insights and, especially to Jeff for the sensitivity
tests. I have enjoyed this thread and hope that no one has taken
anything to be any kind of personal attack on how anyone runs their
repeater.
Jeff's comment below pretty much sums up the
I have enjoyed this thread and hope that no one has taken
anything to be any kind of personal attack on how anyone runs their
repeater.
Of course not. No matter how much I or anyone else nit-picks technical
details, it's still supposed to be a fun hobby.
My point was is it needed?
I
Why use Heliax? 'Cause we can! hehehe (In my case, I have someone else footing the bill, and they have SPOOLS of Heliax available, so...) Just another observation regarding my use of the power I mentioned: I have an area where even mobile coverage is poor, and the extra power has allowed me
I built an electronic load several years ago using two big heat sinks to
which I fixed some 2N3055 type transistors that I bought at BG Micro. I
fitted the two heatsinks into a tunnel just like this heat sink and put
a 12 v. muffin fan at one end. The load can be set for just about any
If we went around putting 3 dB pads on our repeaters until someone
noticed, we'd soon have a repeater that no one would be able to use. In
this forum, most of us strive for the best operation we can afford, or
set-up up to our best ability. A matched system is one that works as
well in one
Hello everyone,
I've been given a compete Quintron paging transmitter
currently on 43 mhz. The 6 foot rack includes a synthesized exciter,
control, metering and (heavy) power supply. Although I find serial
numbers on all the individual modules and the entire rack, I can't
seem to find a
Hi all,
I've use hair dryers and heat guns to test 120 volt small
generator. Works great. Even used a small heater I bought for my
son about 14 years ago that provides for a 500, 1000 1500 W
swithcable load at 120 VAC.
A 1000 W hair dryer (typical) at 120 VAC RMS thats 14.4 Ohms. At
13.8
Nate, Wy0X
Don't want to leave IRLP are bunch of old foggies. IRLP is
excellent system. We have 3 or 4 here in Tampa area and many enjoy
the operation. However, some did get turned off when certain
subjects came up.
We have a few Echolink stations also. IRLP and Echolink are, in my
The policy of some repeater coordination councils to insist on a 100-
mile co-channel separation for UHF (and 120 miles for the lower-
frequency bands) regardless of the ERP seems like overkill to me. In
fairness, they do allow the consideration of terrain/ERP factors at
locations below
Chuck Kelsey wrote:
Alright, I believe your numbers. A repeater receiver with a high-end
preamp vs. a ham grade mobile receiver averages just under 6 dB better.
I still contend that in a mobile environment, under motion, that the
user will not detect the 6 dB difference. It will be barely
I like the CAT Controllers. I have the CAT-1000 on 2 meter, CAT-700B used
with Icom 706 as a HF
remote link setup on UHF and a CAT-200 with a Peet Bros weather station.
I have had repeaters for
a few years but not as knowledgeable as most of the Repeater Builders are
here. I know I can Call
- Original Message -
From: Paul Yonge [EMAIL PROTECTED]
The policy of some repeater coordination councils to insist on a 100-
mile co-channel separation for UHF (and 120 miles for the lower-
frequency bands) regardless of the ERP seems like overkill to me. In
fairness, they do allow
three miles? the guy should get it.
- Original Message -
From: Ray Brown [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, February 12, 2006 6:21 PM
Subject: Re: [Repeater-Builder] UHF Power
- Original Message -
From: Paul Yonge [EMAIL PROTECTED]
The
Timothy V Horvath wrote:
I like the CAT Controllers. I have the CAT-1000 on 2 meter, CAT-700B used
with Icom 706 as a HF
remote link setup on UHF and a CAT-200 with a Peet Bros weather station.
I have had repeaters for
a few years but not as knowledgeable as most of the Repeater Builders
On Sun, 12 Feb 2006, Chuck Kelsey wrote:
typical mobile installation? Maybe not. Do we DESIRE to run a certain
level because we can? Sure, just like we may want to install a 100KW
generator on site to run 3KW of load. That's fine if you can afford it,
I suppose. My point was is it needed?
On Sun, 12 Feb 2006, Paul Yonge wrote:
The policy of some repeater coordination councils to insist on a 100-
mile co-channel separation for UHF (and 120 miles for the lower-
frequency bands) regardless of the ERP seems like overkill to me. In
fairness, they do allow the consideration of
I don't think that wet stacking is an issue on newer Cummins gensets.
The 5.9L ISB is PCM/ECM controlled and the injectors are electronically
fired. They run clean no mater what the load or how long.
Kris Kirby wrote:
On Sun, 12 Feb 2006, Chuck Kelsey wrote:
typical mobile installation?
--- In Repeater-Builder@yahoogroups.com, Kris Kirby [EMAIL PROTECTED] wrote:
On Sun, 12 Feb 2006, Chuck Kelsey wrote:
typical mobile installation? Maybe not. Do we DESIRE to run a
certain
level because we can? Sure, just like we may want to install a
100KW
generator on site to run 3KW
Chances are nobody will notice. But then again, they
probably wouldn't
notice if you put a 3 dB pad between your duplexer and
receiver either...
I have tried the experiment of going up to the site for a couple hours,
and not even opening the door.. Then ask if anyone notices any
--- In Repeater-Builder@yahoogroups.com, Mike Morris [EMAIL PROTECTED] wrote:
Anybody want to write up an article for repeater-builder.com
on the power supply test load?
Are you looking for something like a constant current sink?
Yahoo! Groups Links
* To visit your group on the
Variable 1 amp to 100 amp.
12v to 60volt.
Brett
- Original Message -
From: Dave VanHorn [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, February 13, 2006 8:31 AM
Subject: [Repeater-Builder] Re: Cheap Tunnel Heatsink
--- In Repeater-Builder@yahoogroups.com, Mike
I was planning on using natural gas ;-)
Chuck
WB2EDV
Kris Kirby wrote:
On Sun, 12 Feb 2006, Chuck Kelsey wrote:
typical mobile installation? Maybe not. Do we DESIRE to run a certain
level because we can? Sure, just like we may want to install a 100KW
generator on site to run 3KW of
--- In Repeater-Builder@yahoogroups.com, Ray Brown [EMAIL PROTECTED] wrote:
. I have an Elmer here ... He's been trying, unsuccessfully, for the
past 5 years to get coordination on a 2m repeater because his location
is 97 miles from another repeater (in a different state) and the other
coordinator
That has nothing to do with what is under the hood! :
but now I have digressed beyond the horizon!
Kevin King SCSA BSCIS
ARS KC6OVD
GMRS KAG0378
EIEIO 2722
Acworth Georgia
While we are digressing, I guess all them sleeping truckers are Wet
Stacking too.
Yahoo! Groups Links
At 2/12/2006 08:24, you wrote:
Did you try the V7A with AIP on?
No, I didn't, but I'll do that later today if I get a chance. The other ham
rig in my truck is the other Kenwood dual bander (TM-708? getting old and
don't remember model #'s like I used to). I'm not sure but I think that has
G'Day All,
I am about to install a set of back-up batteries for our repeater. Designed
for back-up use.
These are 2volt cells, 460amp/hr over 10hrs. What is written on them
So we have 6 cells connected together to give 12volts.
We are pulling , when everything is running, no more then 10amps.
Greetings,
I am in desperate need of technical help. I have been attempting to
repair a VHF repeater for a non-profit organization that needs this
box for a portable setup to support parades and special events. The
setup is two Motorola mobiles tied together with a controller running
the
On Mon, 13 Feb 2006, Kevin Natalia wrote:
These are 2volt cells, 460amp/hr over 10hrs. What is written on them So
we have 6 cells connected together to give 12volts.
I came up with some contrived math and seems like it ought to work, but I
have no idea if my ideas are right. If we take a
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