[TenTec] Scout 555 garbled SSB TX.
Michael O. Hyder
Michael O. Hyder" <N4NT@wireco.net
Mon, 11 Jan 1999 12:45:54 -0500
I believe that once the charging is finished and the battery allowed to
settle down, the voltage is right at 12.8 if fully charged. This is enough
of a difference from the 13.6 or so that a supply puts out that it makes
some Ten-Tec rigs have trouble. If memory serves, some of my older models
had trouble with their display when run from a storage battery regardless of
its state of charge.
Mike
-----Original Message-----
From: Dr. Gerald N. Johnson, P.E. <geraldj@ames.net>
To: James Griffith <GriffithJ@ricks.edu>
Cc: tentec@contesting.com <tentec@contesting.com>
Date: Monday, January 11, 1999 12:34 PM
Subject: Re: [TenTec] Scout 555 garbled SSB TX.
Full charge should be 13.8 up to 14.2. Perhaps a little lower on the
deep cycle, but not a lot. Not as low as 12.7 I don't think.
What I think you have is symptoms of a regulator in the scout without
much head room. E.g. trying to make a 10 volt regulated voltage with a
LM78xx chip that needs 2.5 volts head room. There are some more modern
chips in the LM2900 range that will work with half a volt head room.
Clean the connections on your power cable and then make a new cable with
real wire, say 10 gauge to minimize the drop. Clean your battery posts
until they shine, also the mating connectors. Clamp them tightly.
With the engine running your car battery voltage will be higher than the
deep cycle battery not being charged.
73, Jerry, K0CQ
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