[Elecraft] kpa100 low output
W3FPR - Don Wilhelm
w3fpr at earthlink.net
Sat Aug 13 14:19:19 EDT 2005
Pat,
A note to mailto:parts at elecraft.com should get 2 new non-inductive resistors
on their way to you when Scott and Brian get back to work on Monday.
If you have not been updated on the information, the capacitor change does
not do the trick entirely, the increased value caps are OK, but simply move
the problem down a bit in frequency. The 4700 pf caps are also OK and will
be the ones shipped and recommended.
73,
Don W3FPR
> -----Original Message-----
>
> On Fri Aug 5 23:04:11 2005, "Pat N8VW" <k2 at linuxcolumbus.com> wrote :
>
> >
> > After some more debugging it appears that the ksb2 is causing
> the problem.
> > Removing it returns tx power to normal levels. Some might say, good you
> > don't need ssb anyway.
> >
> > Looking at the dac u2 I find that pin 5 is at 6v when it should
> be ~.6v on
> > tx and rx. Removing Q1 makes no difference so it appears that u2 is the
> > problem.
> >
>
> Received parts from elecraft, installed and power is now back to normal.
> Well, except testing with the kpa100 and a real wattmeter reveils that I
> have the low-power on 20m/17m.
>
> Hello, Elecraft it's me again!
>
> Pat N8VW
>
>
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