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Re: [RFI] Non-RFI Battery Voltage Regulators

To: "'Fred Stevens K2FRD'" <k2frd@mac.com>, <rfi@contesting.com>
Subject: Re: [RFI] Non-RFI Battery Voltage Regulators
From: "Dan Violette" <danki6x@earthlink.net>
Date: Fri, 11 Aug 2006 18:12:48 -0700
List-post: <mailto:rfi@contesting.com>
Did you try again recently?  I saw something that he was selling again.  I
think they were $25 more now.  I was thinking of this one too for when the
car is not running.  Dan KI6X 

-----Original Message-----
From: rfi-bounces@contesting.com [mailto:rfi-bounces@contesting.com] On
Behalf Of Fred Stevens K2FRD
Sent: Friday, August 11, 2006 12:50 PM
To: rfi@contesting.com
Subject: [RFI] Non-RFI Battery Voltage Regulators

Anyone in the group knowledgeable about or experienced with battery voltage
regulators (aka controllers, battery extenders, battery boosters, DC to DC
converters, etc) which will take power from a nominal 12vdc battery source
and regulate it such that it produces 13.8vdc no matter how much the
battery's charge is drained (say, boosts as low as from 11.0vdc to 13.8vdc)?
The key criteria is that such a boost (as opposed to "buck") controller will
NOT produce RFI. 
There are a lot of buck/boost controllers on the market (are made for solar
chargers, computer or other electronic equipment, machinery, automotive and
RV appliances, stereo/TV devices), but they aren't manufactured for ham
radio utilization with RFI in mind. Feedback I've gotten to date from other
sources is that many/most are RF noisy and I'm not about to drop $100 to
$200 (and up, way up) experimenting with unknowns.

In the October 2005 QST, such a battery extender made by a Phoenix, AZ ham
was reviewed and the price was acceptable, but so many hams wanted to buy
one, the ham was swamped with orders, so he quit making them. I have not
heard of any other controllers which would work for ham radio except,
perhaps one made by Xantrex for its Trace line which may or may not have had
RFI problems.

I'm a fulltime RVer, operate out of my travel trailer, have found
battery-only operation to be far RFI-quieter than any generator,
generator-inverter, power supply, or any combination thereof, but am limited
to my battery bank's (two to four marine batteries) charge level and voltage
which is usually an hour, two to three hours at best at lower power.

73 de Fred Stevens K2FRD, VO2FS
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