[Elecraft] ERR IO3 AGAIN

[Bill W4ZV]

Robert 'RC' Conley wrote:
> 
> Tue night severe T'storms came through the Monroe, LA area. I lost my
> computer the the Comcast link. After that is when the ERR IO3 made itself
> known. I'm surmising I receive a spike through the RS232 cable. Is this
> possible? My antenna were disconnected along with power.
> 

Yes...absolutely possible and in fact probable since your computer was taken
out.  Lightning > cable > computer > KIO3.  This has been an ongoing problem
with U1 on the KIO3 Main board and Eric has promised a mod to fix it but I
haven't yet seen it appear.  Here's how to check U1:

http://mailman.qth.net/pipermail/elecraft/2011-April/148361.html

If U1 measures bad, you likely need a new KIO3 Main board since U1 has
finely spaced pins.

73,  Bill

P.S.  Now I disconnect all RS-232 or USB ports in addition to all antennas
and power.  The last time this happened to me the problem was apparently
induced by EM fields from a nearby strike.--
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