[Icom] Battery Operation

Sun, 15 Jun 2003 20:49:53 -0400

Look at a DC to DC converter. The input on these switchers handle a pretty
good swing while maintaining a solid output.

Bob, W3PT

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Dean Norris
Sent: Sunday, June 15, 2003 8:41 PM
To: Icom Reflector
Subject: Re: [Icom] Battery Operation

At  14:30 6/13/2003, William Lambing wrote:
>The problem with battery operation is:
>
>What is the output voltage?
>
>Is it 12V or 13.6/13.8V?
>
>Many radios sound absolutely horrible at 12V.  Some shut down, some start
>to FM...and on and on.  Listen to Midcars or ECARS someday while some of
>these guys, mobile, with the engine shut off attempt to contact
>someone.  95% of the time, they are completely unreadable.  Now if you run
>CW...then all bets are off..!  This mode usually works just great.  It is
>the SSB peak output that gets you in trouble.  Sometimes you can cut the
>power down to 50W and things are ok.....for a while until the 12V gets
>lower and lower..!
>
>Using a charger whilst operating on batteries, introduces hum from the
>charger.
>
>73
>
>Bill, W�LPQ

I have the IC760MkII and try to run it from my camp trailer
batteries.  Even when fully charges at 12.8 v or so, it sounds bad on
SSB.  As the voltage drops, it gets worse.  Sounds fine at 13+ and up.

Sure takes the fun out of hamming from the camp sites. I know there is a
device that inputs 12.6 and less and boosts it to 13.6.  I may have to look
into it.

Dean

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