[Elecraft] KAT100 and INFO080 problem

[Rolf Dohmen]

Hello friends,

i recently build my k2#5426 and it works amazingly fine. But now i run 
into some trouble with my external tuner: when connected, i get this 
info080 message during power-up and the KAT100 wont start. Inside my K2 
the KAF, the NB, a kio and the ssb-adapter are installed and work 
perfectly. Firmware should be the last possible release, i got my kits 
just three weeks ago.

Of course I searched the eMail list but didnt find really a solution to 
my problem.

What i already did: i checked both my K2 and my KAT100 again carefully, 
all ICs etc are correct installed; i tried to connect them directly via 
a short 10pin flat-ribbon cable between P4/control board and P4/KAT100 
rf board; i checked the AUX-BUS connection between the K2 MCU and the 
KAT100 MCU. When I am disconnecting the KAT everything works fine again; 
when i remove the MCU from its socket in the KAT no error appears. -So I 
am thinking that the problem must be somewhere in the auxbus 
communication between the rig and the tuner, but because of the fact 
that the K2 alone runs flawless with all the modules installed i would 
rather search the bug inside the kat.

Maybe anyone here outside does have an idea whereand how i should 
proceed with my troubleshooting? Might it be possible that the MCU 
inside the tuner could be defective and i should order a replacement? 
-Any hints/ideas are warmly appreciated,

greets from cologne,
-- 
Gruss! & 73 de Rolf Dohmen, DL1KJ

       Dohmen EDV&Telekommunikation * Dammstr.13 * 50259 Pulheim
Tel:02238/9638-96 Fax:-99 Mobil:0172/2719098 mailto:info at dohmen-edv.de