[Elecraft] KPA-100 under test

Wed May 29 02:25:01 2002

I hope I haven't had you folks scratching your heads too much!  My problem
was finger trouble.  Don't you just hate it when you have to own up to that!
Somehow whilst setting Fan HiLo and Fan Hi I managed to switch off the
KPA-100 in the menu.  For those that may be interested I can confirm that
the fan doesn't work when you do this.  Duh!

The KPA-100 is complete and producing a nice clean 100 W on all 9 bands.

Congratulations Wayne & Eric you've done it again.  Super job!

73

Bob 5B4AGN

> ----- Original Message -----
> From: "Bob Henderson" <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, May 28, 2002 8:46 AM
> Subject: [Elecraft] KPA-100 under test
>
>
> > Hi
> >
> > I was one of the lucky ones who got to bring back a KPA-100 kit from
> Dayton.
> > The kit is assembled and currently under test.  However, I have hit a
snag
> > and would appreciate a bit of help.
> >
> > Testing so far has progressed to Page 46 - Fan Test routine.
> >
> > The fan does not operate with fan mode set to either FAN LoHi or FAN Hi.
> > The fan itself is ok as it operates briefly when the K2 is powered up.
> > Looking at the cct diagram on page 62 it is apparent that U2 pin 11
(/out
> 7)
> > should be low to drive the fan at low speed and U2 pin 12 (/out 6)
should
> be
> > low to drive it at full speed.  These signals are both unconditionally
> high
> > on my KPA-100.  Outputs RC7 & RC6 from U1 are required to go high to
> operate
> > the fan at low/high speed.  These outputs are both unconditionally low.
> U1
> > & U2 are otherwise operational as my low pass filter switching is
> operating
> > correctly.  My fault finding has ground to a halt at this point as I
don't
> > know what input is  required at U1 to turn the fan on.
> >
> > Can someone point me in the right direction please?
> >
> > Many thanks.
> >
> > Bob 5B4AGN
> >
> >
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>