[Elecraft] KPA100 Update

[W3FPR - Don Wilhelm]

Morris,

If your KPA100 works FB, do not change anything.

I have it on good authority that the real problem is not the capacitors, but
the resistors, particularly the 1.6 ohm 2 watt resistors.  Apparently the
manufacturer changed to an inductive design without consulting with their
clients (including ELecraft).  As a result, you can look for Builder's alert
22 to be resinded and replaced with a new one.

Again, if your KPA100 has good output on all bands, this is NOT for you - it
only happens to those unlucky folks who received resistors that are
inductive with their kit - the older resistors are non-inductive, and no
change is recommended - 'If it ain't broke, don't fix it'.

73,
Don W3FPR

> -----Original Message-----
>
> I have one of the older KPA100s and have done all the mods and
> upgrades.  However, I have seen a recommendation to change C80
> and C81 from 4700 to 5600.   I have not seen these cap changes in
> the errata sheets.  My KPA100 works well on all bands, 160 thru
> 10 (including 60 meters) with full output on all bands.  Are the
> new KPA100 kits supplying the 5600s or are these just changes if
> there is a problem with 15 and 17 meter low output?  Thanks   Roy
> Morris  W4WFB
>
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