Kelsey
Sent: Wednesday, June 09, 2010 8:51 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] MOVs for power supply primary
OK, I'm familiar with those single-point grounding panel
protection devices.
How about a service panel protector for home use
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey
Sent: Tuesday, June 08, 2010 4:48 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] MOVs for power supply primary
OK, I should have been more specific. What would be a
reasonable unit for a
repeater site
.
Chuck
WB2EDV
- Original Message -
From: Jeff DePolo j...@broadsci.com
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, June 09, 2010 1:13 PM
Subject: RE: [Repeater-Builder] MOVs for power supply primary
Hmmm. That's a tougher one. Mostly I use the Polyphasers (PLDO-120US
@yahoogroups.com
Subject: Re: [Repeater-Builder] MOVs for power supply primary
OK, I'm familiar with those single-point grounding panel protection devices.
How about a service panel protector for home use?
And a service panel protector for a small (200A) 3-phase panel?
I ask, rather than simply
Thanks Eric.
Chuck
- Original Message -
From: Eric Lemmon wb6...@verizon.net
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, June 09, 2010 10:07 PM
Subject: RE: [Repeater-Builder] MOVs for power supply primary
Chuck,
Square D makes a line of heavy-duty, commercial-grade
It's an Onan 4CCK-3R/1J 1800 RPM, 10 HP,
2 cylinder, gasoline, 3.5 KW, 4 KW surge,
from 1965 with 57 hours use on it.
In the 2003 Northeast USA power blackout,
it ran two homes, including two refrigerators
and a freezer.
Perhaps not a home-size unit, but the
advantage is that is sips gasoline
Jeff -
Could you suggest some makes and models and maybe explain why they are
superior to others?
Chuck
WB2EDV
- Original Message -
Good surge arrestors/TVSS's are expensive, and like most things in life,
you
get what you pay for. If your site has a good surge arrestor at the
And, boy were there stars!
Chuck
WB2EDV
- Original Message -
It was
nice to be able to see the stars again,
without all the light pollution.
Yahoo! Groups Links
* To visit your group on the web, go to:
: Re: [Repeater-Builder] MOVs for power supply primary
Jeff -
Could you suggest some makes and models and maybe explain why
they are
superior to others?
Chuck
WB2EDV
- Original Message -
Good surge arrestors/TVSS's are expensive, and like most
things in life
, June 08, 2010 4:22 PM
Subject: RE: [Repeater-Builder] MOVs for power supply primary
Probably the ones I've had the most luck with are the Islatrol series from
Control Concepts. I think they have been bought out by Emerson or Liebert
or one of the other companies that have power divisions
Of Chuck Kelsey
Sent: Tuesday, June 08, 2010 3:48 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] MOVs for power supply primary
OK, I should have been more specific. What would be a reasonable unit for a
repeater site that may have only a couple thousand dollars worth
Don't use Radio Shack. You're just asking for trouble. Buy from a quality
supplier. Others on the list can give you preferred vendors.
Don, KD9PT
- Original Message -
From: kq7dx
To: Repeater-Builder@yahoogroups.com
Sent: Monday, June 07, 2010 7:38 PM
Subject:
I added a 130 Volt MOV across the hot and neutral
of an Astron 50 Amp power supply for a repeater
and had an interesting effect.
We lost AC power and switched over to the generator.
When the load was added to the generator, the Onan's
voltage sagged a bit and the throttle opened to
bring the
- Original Message -
From: AA8K73 GMail aa8...@gmail.com
I added a 130 Volt MOV across the hot and neutral
of an Astron 50 Amp power supply for a repeater
and had an interesting effect.
We lost AC power and switched over to the generator.
When the load was added to the
I agree fully with NOT using Radio Shack low quality run-off manufacturer
seconds. Use NTE 140V. The trick is you need to use THREE. One across the hot
and neutral. one from hot to ground and one from neutral to ground. MOV's are a
funny dog they do not usually short but degrade very quickly
Subject: Re: [Repeater-Builder] MOVs for power supply primary
I added a 130 Volt MOV across the hot and neutral
of an Astron 50 Amp power supply for a repeater
and had an interesting effect.
We lost AC power and switched over to the generator.
When the load was added to the generator, the Onan's
Harbach sells a set of three that is for the SB-220. You might
look at them.
73, Dick, W1KSZ
-Original Message-
From: kq7dx kq...@yahoo.com
Sent: Jun 7, 2010 8:38 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] MOVs for power supply primary
Hello to group,
Is
I replaced two in two ASRON power supplies that got zapped with 220 and seem
to be still working. I would recommend getting a good brand if you have the
resource.
Mike Mullarkey K7PFJ
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf
Regarding your last question, an MOV normally will go into avalanche mode
when the applied voltage exceeds its threshold value. It becomes a low
shunt resistance, which should blow the input fuse in the device it is
protecting. Once the voltage is removed and the MOV cools off, it usually
Hello to group,
Is putting a MOV from hot to ground, neutral to ground, on
the primary of the transformer of the power supply a good idea..
I have a ICE surge suppressor on in front as well but thought
I would put more inside the supply for back up.
I'm not that big of a fan of MOV's, but
There is no reason to have to put them period.
Extra protection is well.. to each his own. MOV's are not the greatest, but
certainly wont hurt
Kevin B.S.E.E.
--- On Mon, 6/7/10, Jeff DePolo j...@broadsci.com wrote:
From: Jeff DePolo j...@broadsci.com
Subject: RE: [Repeater-Builder] MOVs
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