I understand that the voltage can fluctuate widely when the
utility switches on and out various circuits to meet demand.
Relatively minor voltage changes with modest loading are not the
big issue. Power grid/line glitch problems are a host of very bad
gremlins often labeled as (but not being
and if you're stuck paying really high rack-space rent
inside some of those almost empty commercial repeater sites...
It's prudent to think how size does matter.
Don't get me wrong... I respect and like the Motorhead (motorola)
and GE Ferroresonant type supplies. It takes nearly an act
At 10:12 AM 1/16/2007, you wrote:
and if you're stuck paying really high rack-space rent
inside some of those almost empty commercial repeater sites...
It's prudent to think how size does matter.
Don't get me wrong... I respect and like the Motorhead (motorola)
and GE Ferroresonant type
(much text snip'age)
I agree with you! The only difference will be any increased
efficiencies in the switcher over the mag and that will be small.
efficiencies vs benefits? or are we calling them the same in
this thread?
if the equipment that is powered by the astron, draws 30 amps,
within tolerance.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of N9WYS
Sent: Monday, January 15, 2007 8:43 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Switching Power Supply vs. Astron
-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of N9WYS
Sent: Monday, January 15, 2007 8:43 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Switching Power Supply vs. Astron Etc.
I'd like to pose a question here regarding only a portion
If the supply you are using is fine why change? Yes, you
would gain some amperage capacity.
Relative example...
A room full of Motorola Repeater Stations in non constant
service costs about $30/month each to operate. Put the repeater
into lock to talk mode (IRLP or Echolink) and the
] Re: Switching Power Supply vs. Astron Etc.
If the supply you are using is fine why change? Yes, you
would gain some amperage capacity.
Relative example...
A room full of Motorola Repeater Stations in non constant
service costs about $30/month each to operate. Put the repeater
into lock
Re: Switching Power Supply vs. Astron Etc.
Hi Jim,
I am concerned about noise from even the top line switching
supplies to my equipment and the other equipment in the tower
site.
Probably easier to say each case will be different. Some supplies
do operate at tower sites and no one
The ojective is not gain amperage, I have plenty of that. This one is
available for free to me, and is brand new. This would release the 70 amp
Astron for use back in the ham shack for all the HF equipment, and would serve
also as a standby. Since the repeater is the only unit in this shack,
Of Mathew Quaife
Sent: Sunday, January 14, 2007 10:22 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Switching Power Supply vs. Astron Etc.
The ojective is not gain amperage, I have plenty of that. This one is
available for free to me, and is brand new. This would release
-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Switching Power Supply vs. Astron Etc.
The ojective is not gain amperage, I have plenty of that. This one is
available for free to me, and is brand new. This would release the 70 amp
Astron for use back in the ham shack for all
unit that was supplied with the user's station.
LJ
-Original Message-
From: skipp025 [EMAIL PROTECTED]
Sent: Jan 14, 2007 9:09 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Switching Power Supply vs. Astron Etc.
If the supply you are using is fine why change
are paying for
power.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Sunday, January 14, 2007 11:28 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Switching Power
At 11:28 AM 1/14/2007, you wrote:
Would I gain any advantage by changing out my Motorola MICOR
Repeater TPN1110B supplies (the ones with the constant-voltage
transformer) to the TPN1151A Switching power supply?
---What makes you think the TPN1151A is a switcher?
Ken
How clean are they in the AM broadcast band?
-- Original Message --
Received: Sun, 14 Jan 2007 12:55:55 PM CST
From: Eric Lemmon [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Switching Power Supply vs. Astron Etc.
Mathew,
If you use
You have a golden opportunity to provide an extremely
valuable service to the radio community! If you can obtain
the use of a wattmeter, you can make a comparison between the
two power supplies. One such meter is the KILL A WATT
meter that is sold under several brand names. It is
If you use a modern switch-mode power supply from a reputable
manufacturer, you should not have any noise problems.
The smart money would be to actually check the supply. I've got
some duracomm, astron and a few other current brands that make
more broadcast band poop than a new IBOC
] Re: Switching Power Supply vs. Astron Etc.
You have a golden opportunity to provide an extremely
valuable service to the radio community! If you can obtain
the use of a wattmeter, you can make a comparison between the
two power supplies. One such meter is the KILL A WATT
meter that is sold
these subjects.
David R. Henry LME
- Original Message -
From: Eric Lemmon [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, January 14, 2007 3:07 PM
Subject: RE: [Repeater-Builder] Re: Switching Power Supply vs. Astron Etc.
Larry,
You have a golden opportunity to provide
@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Switching Power Supply vs. Astron Etc.
Jeff,
That sounds like a plan! And I agree with your and Ken's comment about the
TPN1151A being a linear supply- I checked a MICOR manual to be sure. I seem
to recall that there was a MICOR switch-mode supply
Although cheap and EMI-prone switching power supplies are certainly
available to the unwary buyer, the switchers offered by name brand
makers such as Astron, Duracomm, and Samlex are extremely quiet
RF-wise.
Naa I wouldn't make that statement as being global. Just
depends on where
We replaced our troublesome Astron 50 amp, linear, rack mounted supply
with a Duracomm switched mode model about a year ago. No problems
whatsoever thus far. No noise at all on 70cm. Much lighter too; I
didn't hurt my back lifting into the cabinet as I have with the Astron.
--- In
: [Repeater-Builder] Re: Switching Power Supply vs. Astron Etc.
We replaced our troublesome Astron 50 amp, linear, rack mounted supply
with a Duracomm switched mode model about a year ago. No problems
whatsoever thus far. No noise at all on 70cm. Much lighter too; I
didn't hurt my back lifting
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