For thoes talking about using a UPS.
I have a question. ARE you powering the AC side of your repeaters
from the UPS? If so what about the input current rating of the power
supplies and the fact that it is terrably in-efficient to take
13.8VDC input run it through an inverter,a step up
On Sun, 23 Jan 2005 01:27:48 -, Coy Hilton wrote:
13.8VDC input run it through an inverter
Any UPS that is big enough to handle the load of a
repeater is usually powered by 24 volts or more
(many 12 volt batteries in series).
The one I just listed uses an internal DC voltage
of 48 volts,
My machines all run 12 volts when I loose 120Vac the only thing I
loose is the power amp so the machine goes from 180 watts down to 30
watts the UPS backup is for the Computer in the shack. when that dies
Ohh well no big loss the backup Generator should be running
before that happens...
Hello all,
I know Matthew has met his needs but I thought I would share the following
with the group.
Just last year there was a series of articles in QST on running an
Advanced Glass Mat (AGM) battery as a station backup. Another ham and I
researched the project for some time and decided
Yes, you can diplex any two antennas (of sufficient frequency
separation). You will have to keep the feedline lengths correct from the
split (the 'T') to the antennas.
Joe M.
Rich wrote:
I know you can co-phase Mobil antennas, 33- 45 split.
Can It be done with Base antennas? With 50 ft of
I am in possession of a Motorola Desktop station. It contains a power
supply, 2 receivers and one transmitter. The receivers are marked
TLB6322A dated May 18 1971. The transmitter is marked TLB6502A 5-71.
The receiver uses a TLN1081B channel element and the transmitter a TLN1082B.
The
Hi All, It has been pointed out to me that one of the disadvantages
of using a Zetron 38A as a repeater controller is that the back
door dtmf method to set the device to default settings is widely
available on Net! Is there any way of disabling dtmf programming once
the perameters have been
On Sat, 22 Jan 2005, Rich wrote:
I know you can co-phase Mobil antennas, 33- 45 split.
Can It be done with Base antennas? With 50 ft of hard line.
WE had two GE rangers in our EOC and one went bad.
Let me know...
Rich
Why would you want to?
--
Kris Kirby [EMAIL PROTECTED]
Yep my Best Power UPS is the largest that they build that runs off
13.8 volts it's a 1.4 KVA.
I have a question, How long does the 4 33AH batteries last at what
ever load that you have connected, and is it a fairly light load? It
seems that they wouldn't last long with much of a load.
AC0Y
--- In Repeater-Builder@yahoogroups.com, Rich [EMAIL PROTECTED] wrote:
I know you can co-phase Mobil antennas, 33- 45 split.
Can It be done with Base antennas? With 50 ft of hard line.
WE had two GE rangers in our EOC and one went bad.
Let me know...
Rich
Rich, please clarify your
--- In Repeater-Builder@yahoogroups.com, Tedd Doda [EMAIL PROTECTED]
wrote:
On Sun, 23 Jan 2005 18:37:42 -, Coy Hilton wrote:
Yep my Best Power UPS is the largest that they build that runs
off
13.8 volts it's a 1.4 KVA.
Hang on.say you have a 1000 watt load on the UPS, that
I only use it to run the computers,main repeaters are full time DC
powered direct from the battery banks.
Computers for EchoLink,IRLP,server and two TCX-150 repeater controllers.
73,Lee,N3APP
Coy Hilton wrote:
For thoes talking about using a UPS.
I have a question. ARE you powering the AC
On Sun, 23 Jan 2005 18:37:42 -, Coy Hilton wrote:
Yep my Best Power UPS is the largest that they build that runs off
13.8 volts it's a 1.4 KVA.
Hang on.say you have a 1000 watt load on the UPS, that
means you have about 72.5A running from the battery(s) to
the UPS. Hope you have real
I need to mesaure the DB224 I have for use at 145.11 Mhz. and modify
as necessary.
Someone had given me the 2 meter loop length but I can not locate
it. Anyone know what it should be? or the range for Amateur 2
Meters vs. commercial 150+?
Thanks a lot for your help.
Russ
N4KOX
They are 35 1/4 from top to bottom of the element. You will also need to
change the phasing harness. I have one here that had the elements changed,
but did not have the harness change, impedance was way out of wack. I just
ordered a new harness from Cook Towers, getting ready to install it.
Well I am not so sure on that one just yet. Was told that the first element
was 26 from the top, and each element was 58 1/4 center to center from
there, and if that is true, then I'm going to end up with my last element
down into the clamp area. I've been sick most of this week, so have not
This is 100% correct right of the DB chart.
You will be just fine if you set your DB-224
up this way!
Dean Westbrook, EE,PE.
Cook Towers, INC.
Yahoo! Groups Links
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To unsubscribe from this
It is 28" from the top of the pipe not from the end
cap on the top of the antenna.
Dean,
Yahoo! Groups Links
To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/
To unsubscribe from this group, send an email to:[EMAIL PROTECTED]
Your use of
Thanks Dean, but will the bottom element
end up into the mounting section of the antenna, at least half of it?
Mathew
From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Sunday, January 23, 2005
2:21 PM
To:
Repeater-Builder@yahoogroups.com
Subject: Re:
Ok, was given 26, might have wrote
it down wrong. Thanks for clearing that one up.
Mathew
From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Sunday, January 23, 2005
2:22 PM
To:
Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder]
Re: DB224 Loop Lengths
Thanks, I hope you feel better soon.
Russ
N4KOX
--- In Repeater-Builder@yahoogroups.com, Mathew Quaife [EMAIL PROTECTED]
wrote:
Well I am not so sure on that one just yet. Was told that the
first element
was 26 from the top, and each element was 58 1/4 center to
center from
there, and
Hey Mathew,
This is how we set up our DB-224 in Ocean City NJ and it works real well.
But come down 26 from the top of the pipe and not the point on the end cap.
If you do it will through you off all the way down. No the last dipole will
NOT hang off the end of the support pipe unless the support
Oh indeed, will give it a shot and see what happens, hate to mess it up
since I have to redrill the holes for the new harness. As for fun when the
weather breaks, you bet, a 100' Self Support Pyrod to install, at least 4
other towers for GMRS and the repeater, all over 100'. Sounds like a busy
If you are looking for the length of the loops in addition to the spacing
the 2 meter DB224's I just put up had 37 inch loops on a 22 ft mast. The
factory element spacing was not consistent so you should definitely check
your spacing per the dimensions Russ gave. I have one 150 mhz DB224 and it
I just measured mine (not as cold in North Florida as for you guys,
but it was interesting to measure the deminsions on my two antennas:
Both Had top element center 26 from top of pipe (so that was OK.)
Both had 34.25 inch loops (top to bottom)(reasonable)
Both had 62 separations from center
If you look back at a post I did a couple of days ago The variable element
to element spacing on our DB224E's new from the factory ran anywhere from
62 to 70 inches.
If you do some web searches there are several methods that have been used to
extend the short elements. These range from
On Sun, 23 Jan 2005 01:27:48 -, Coy Hilton wrote:
13.8VDC input run it through an inverter
Any UPS that is big enough to handle the load of a
repeater is usually powered by 24 volts or more
(many 12 volt batteries in series).
The one I just listed uses an internal DC voltage
of 48 volts,
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