[Elecraft] K2/100 Separates

[Michael E. Dobson]

There is one additional component that Don forgot and that is the 
replacement of one of the miniature RFC chokes on the KIO2 with a 
toroid equivalent.  I have suggested to Elecraft that they revise the 
KIO2 to use a toroid at that location to prevent problems with people 
(like me) who simply plugged everything into a KAT100-2 without 
benefit of any instructions other than the knowledge that it was 
easily done.  It worked fine for me for two years when a surge on the 
KIO2 lines between the K2 and the external KPA100 blew out the 
miniature RFC.  Four turns through an FT23-43 and a quick solder job 
and I was back in business.  AFAIK, that is the only "gotcha" to 
watch out for with remoting the KPA100.  There were even instructions 
for building the Y-cable to interconnect the base K2, the KPA100 and 
your computer in either the KIO2 or KPA100 manual.

73,
Mike WA3KYY

At 07:09 PM 3/8/2006, Don Wilhelm wrote:
>Rob,
>
>I would guess that Elecraft folks are not ready to put up with the headaches
>that could arise with the AUXBUS timing should someone want to put a 10 or
>15 foot cable on a remote KPA100/KAT100-2 combination.  At the moment, those
>folks have their hands full and do not have time to test it properly.  So if
>I were in their shoes, I would not put out instructions for doing anything
>that has not been adequately tested - the Elecraft name and reputation do
>depend on the results.
>
>That certainly should not limit an individual from trying it, if it doesn't
>work, one can always revert to the 'standard' installation.  There are a
>growing number of us who have mounted the KPA100 externally, and within the
>implementation limits of those success stories, we can say what we have
>found to work - my connecting cables are about 2 feet long, I can't speak
>for anything longer and I don't have the KAT100-2 here, only the external
>amp.
>
>In my opinion, the 'kit of parts' to mount the KPA100 externally is in the
>box of parts for the KAT100-2 - the KPA100 will plug nicely into the
>provided connectors on the KAT100-2 board (except for the KPA100 speaker).
>
>73,
>Don W3FPR
>
> > -----Original Message-----
>
> > I am considering increasing the power of my bells and whistles QRP K2
> > to 100w.  (Seems a long time to the next sunspot maximum and I am
> > growing old).
> >
> > Don and Lyle have given very helpful advice on building the power amp
> > and auto tuner into a separate unit and I would like to follow
> > this course.
> >
> > Lyle does of course rightly add "at your risk" headers to his page.
> >
> > My question is why there is no Elecraft kit of parts and stepwise
> > instructions to provide for this requirement - it seems to be an
> > obvious component of a modular system which can be used in the shack
> > and mobile.  A "factory approved" set of instructions and components
> > fills a market need.
> >
> > Rob M0RAC
> > K2 3314
> >
> > Robert A Cochrane
> > 7 Lawn Terrace
> > Blackheath
> > London SE3 9LJ   UK
> >
> > Tel (44) 020 8297 1978
> > Mob (44) 07764 197 701
> >
>
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