KPA100 and KAT100 remote mounting

[VE3WDM]

I have read when you remote mount the KAT100 and KPA100 the KIO2 that is used in the remote unit has to have a larger inductor? Is this still the case, if so what size and does elecraft provide it?
Mike
VE3WDM
     
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[Don Wilhelm-4]

Mike,

The tiny 15 uHy inductor on the older KIO2 AUX board is marginal in
current handling capability when both the KPA100 and KAT100 are remote
mounted.  It will likely work for a while just fine, but I would
recommend changing it to a higher current inductor.  If you have a spare
FT43-25 or FT43-37 toroid core around somewhere, wind 12 turns on it and
install it.

The early KIO2 AUX boards used an inductor that was quite small and the
tiny RFC body fit nicely into the holes in the board.  Those tiny RFCs
are the ones which are marginal.  If the body of the RFC that you have
installed is too large to fit the holes and still lay flat on the board,
your existing RFC should have adequate current capacity.

Elecraft does not provide it as a part for that purpose, but if you want
to order one, I would suggest the 15 uHy RF chokes normally used in the
KPA100 T/R switch - PN E690006.

73,
Don W3FPR

On 9/17/2011 7:48 PM, Mike Weir wrote:

> I have read when you remote mount the KAT100 and KPA100 the KIO2 that is used in the remote unit has to have a larger inductor? Is this still the case, if so what size and does elecraft provide it?
> Mike
> VE3WDM
>    
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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[VE3WDM]

Don thanks very much for the information. I was wondering  if the part number you supplied was an Elecraft number? If so I will request that when I put my next order into elecraft. If I decide to go with winding my own toroid what gauge of wire do you suggest to use?
Mike
VE3WDM

[Don Wilhelm-4]

Mike,

That part number is an Elecraft part number - otherwise I would have
specified the distributor.
If you wind your own toroid, the wire size is not critical.  If you have
some left over #26 or #28 wire from prior Elecraft kits, that will work
just fine.

73,
Don W3FPR

On 9/18/2011 7:08 PM, VE3WDM wrote:
> Don thanks very much for the information. I was wondering  if the part number
> you supplied was an Elecraft number? If so I will request that when I put my
> next order into elecraft. If I decide to go with winding my own toroid what
> gauge of wire do you suggest to use?
> Mike
> VE3WDM
>
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