Motorola MSR 2000 (and Micor) Repeater Conversion
Text update and (opps) error correction.
Hello there,
Much to my surprise, I've discovered the MSR 2000 (and Micor)
Repeater to External Controller conversion package (downloadable
sqlgate.zip file) on the www.radiowrench.com/sonic page was
Wouldn't the second harmonic of a 1/4 cavity
contain minimal F2 rf energy?
(The 3rd harmonic is another issue)
cheers,
skipp
Jim B. [EMAIL PROTECTED] wrote:
... because cavities can frequently
be resonant on the second harmonic (or higher),
which is what you're trying to filter out.
I've seen people use the battery charger ... but I don't don't
have an opinion on using one.
Neil
Mathew Quaife wrote:
Got one to spare...Hi HiI don't have a problem running the batteries,
it's keeping them charged at a rate that they can handle. We don't often
loose power
Well call this luck of the draw. I just had donated three 86 amp hour
batteries and the charger that came out of a telephone communications tower.
Probably will go pick them up next week. So till then, guess I don't get to
use my amateur station as I robbed the power supply.
Thanks for the
And also note that marine grade batteries wont last very long in standby
duty,a little better than a car battery but not much. Its worth the
extra money to buy gel cell type batteries designed for that type of
duty.They are also totally sealed which may be required if used in your
home or at
I agree! One only know how much damage could have been created once the
power supply died. I don't even know if it sent any power backwards, but no
damage to the equipment. The donator of the batteries is a commercial
broadcast technician as is his father, and has offered his knowledge in
Pretty Expensive, my cost as a dealer is near the $200.00 mark, and that's
before shipping. At least for the good ones. Might work.
Mathew
-Original Message-
From: Mark Holman [mailto:[EMAIL PROTECTED]
Sent: Friday, January 21, 2005 6:55 PM
To: Repeater-Builder@yahoogroups.com
Mathew,
There has been some good advice on here about different method to
accomplish what you want to do. I have used both the relay idea and the
diode isolator with success. As others have mentioned, using a smart
charger is your best insurance for reasonable battery life.
FWIW, the
Scott,
A ferrite circulator is simply a three-terminal device that is designed
to steer RF currents so that they move in one direction around a
circular path between ports that are spaced 120 degrees apart. What
comes in at one port will leave at the next port if the terminating
impedance is 50
Just to add to Russ, W3CH.
The local club in NJ that did
this did NOT install the battery's
in the UPS. That was not made
real clear. They sit next to
the APC brand UPS in two Sears
battery boxes. This has been working
on there repeater for well over a
year. Russ is correct it is very
cost
I think you are talking about Optima batteries. Yea I've got one in my
Minivan :) It's the main battery and has been working great for quite
awile. 3 year free replacement. I have the Red top battery but all the
young bucks say the yellow lasts longer. I didn't see much difference.
Mathew where are you buying yours?
Ebay has lots!
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItemrd=1item=7948379212category=33574
- Original Message -
From: Mathew Quaife [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Friday, January 21, 2005 10:13 PM
Subject:
- Original Message -
From: Jim B. [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Friday, January 21, 2005 1:20 PM
Subject: Re: [Repeater-Builder] Re: Powering the Repeater With Marine
Batteries
edctexas wrote:
Look on the Kevin's Web site under Astron power
Hey Jim - wouldn't that work if you used a 12 volt relay powered by the Astron?
I understand what you are saying and your post has warned me of a potential
problem coming on my system ( which has a 120 volt relay ) Never ever even
considered that possibility. Thanks for the tip, Dave / NØATH
A friend of mine and I designed a very simple circuit to modify the
Astron 20A Power supplies to do this job. Obviously this could be done on
any power supply but the Astron 20A is common and inexpensive and they leave
enough room to put this all inside easily. The first thing you will need is
We also use the same idea here ...
we use 2 batts from the scotters .. thay are sealed lead acids . work
great !! and thay can really be drawn down if needed ( that's what
thay where made to do)
and the price is not bad .. we paid $100 each for them and verry
will worth it
and we also
I prefer solid state isolators between the batteries the supply.
West Mt.'s was reviewed in a recent QST (see below), and Duracom (
others) have similar units at varying prices. I recommend them
highly, and use them in commercial, public utility, and public
safety applications.
I have
Eric, Jim, and others,
Thanks for the replies. Your explanations were as I expected but I
wanted to be certain. I am very familliar with circulators as we use
them quite often in microwave configurations. When I became aware of
isolators, I attempted to research them and concluded that there
The UPS w/ external battery is a great idea. One thing you need to
watch however is the in-rush current of a nearly drained battery
stack. If there was an outage which took the batteries down to
where the UPS shut off, when A/C returned the batteries *might* want
allot more food than the
The UPS's I have used had current limiting on their charging circuits
and never had a problem running bigger external battery banks,but YMMV
depending on the design... However,lightning wasnt so kind. Anyone have
a surplus UPS FS?
kc2cjw wrote:
The UPS w/ external battery is a great idea.
Can anyone tell me where to find the CAS or COR signal for an Icom F-
420?
Yahoo! Groups Links
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* To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
* Your use of Yahoo!
Home Depot has a cheap UPS for about $39.00
Beakin or something like that brand. I bought
3 for at home and they work out OK.
Dean Westbrook, EE, PE.
Cook Towers, INC.
Yahoo! Groups Links
To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/
To
This is all 100% true. But try this little mod.
Add a 14 VDC light bulb in series with the load.
It will help to limit this problem.
Dean,
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To unsubscribe from this group,
Mathew
You should at least check the option BB on the Astron. The backup
option gives 13.8V current limited at about 3A. We just replaced
four deep cycle batteries in parallel after about seven years of service
being kept alive with the BB option.
Gran K6RIF
At 09:11 1/21/2005, you wrote:
The 13-509's are more common than you might think. I lot of them are
popping up in estate sales and on E-Bay for well under $100. I've
found half a dozen of them just this past year. If you just monitor
one local 220 machine, buying one of these and ordering a crystal set
for it is an
On Sat, 22 Jan 2005 10:38:37 -0500, Q wrote:
However,lightning wasnt so kind. Anyone have a surplus UPS FS?
Sure, how much do you want to spend :)
I have one surplus to my needs:
A) Alpha UPS 2200 complete with 4 NEW 33AH gell cells
-laughs at loads below 1.5 KW
-instant start - think of it
Well the battery and power supply problem
was rectified by a ham that lives about 30 miles from the repeater. He
recently began using the repeater. He over heard me talking to another
ham telling him what happened to the power supply, and jumped in and donated
three large capacity
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
Yahoo! Groups Links
* To visit your group on the web, go to:
I've been doing some research into 3-mode battery chargers and the Ibex
units seem to fit the bill for my application. Using your link, I checked
their web site but they state they will not sell to individuals. Is this
true and is there a way around this?
Richard, N7TGB
-Original
I have bought from them several times in the past and they said on the
phone that they will sell to hams. Their service was good. They don't or
didn't take credit cards but did ship as soon as they received my check.
73, Tony W4ZT
Richard wrote:
I've been doing some research into 3-mode
Thanks, John. I did get in touch with them.
Doug
- Original Message -
From:
John
Przychocki
To: Repeater-Builder@yahoogroups.com
Sent: Friday, January 21, 2005 5:58
PM
Subject: Re: [Repeater-Builder] Cook
Towers
hmmm, just got a letter from them,
On Sat, 22 Jan 2005 10:38:37 -0500, Q wrote:
However,lightning wasnt so kind. Anyone have a surplus UPS FS?
Sure, how much do you want to spend :)
I have one surplus to my needs:
A) Alpha UPS 2200 complete with 4 NEW 33AH gell cells
-laughs at loads below 1.5 KW
-instant start - think of it
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