[Icom] IC-751, Add fail-safe, RAM back-up battery modification atlow cost and risk

[Marsh Parker]

Over a year ago I had the same problem with my 751-A.  I elected to purchase from Roberto Nardo,
IK2RND an EPROM version of the RAM based board provided by ICOM.  This has worked out well for me.  I
had no problems in dealing with Roberto and he was very prompt.  Check this web site for more info.
http://home1.gte.net/rhashiro/ik2rnd-icom-ramboard.html

This also works on many other Icom radios!
73,
Marsh NC7V

Stuart Rumley wrote:

> My IC-751 is about 20 years old now and still has the original battery
> in it.  I decided I would change the lithium cell but clearly didn't
> want to risk losing the program memory.  I'm sure others have thought
> of this "outboard battery" idea but I though I would document it for
> others to take a look at.  This method taps into the RAM board with a
> pair of diode ORed lithium cells so that in the future one cell can be
> replaced at time and greatly reduces the risks associated with
> unsoldering the cell from the RAM board.  Further, this mod leaves the
> still good battery on the RAM board and supplying power during the
> modification.
>
> <http://www.valontechnology.com/icom751/mods.html>http://www.valontechnology.com/icom751/mods.html
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