Posted by
PE1E on
Oct 28, 2006; 4:26pm
URL: http://elecraft.85.s1.nabble.com/Re-Z-range-KAT2-tp394831.html
Thanks Don.
I found that the my KAT2 tunes about everything ( endfed long- and
shortwires, random length wire verticals with and without radials ( 100' asl
! ) on 80-40-20-15 where my LDG 200 Pro ( automatic atu ) fails definitely.
LDG 200 claims to match ~ 5-1K and in order to judge the misperformace of
my LDG200 I want to know the Z ranges on 80-4-20 of my KAT2, so that I can
claim a LDG refund or repair.
BTW, and a bit OT, I presume an external KAT 100 fits 100 W continuous.
Could the KAT100 withstand 250 W SSB( speech SSB only, no CW no FM ) , if my
sig is not rf clipped ( my old Datongs rf clippers ....) and my
transmissons are short ?
If so, I'll get rid of the LDG and buy me a KAT100.
Peter, PE1E
----- Original Message -----
From: "Don Wilhelm" <
[hidden email]>
To: "PE1E" <
[hidden email]>; <
[hidden email]>
Sent: Saturday, October 28, 2006 5:02 PM
Subject: RE: [Elecraft] Z range KAT2 ?
> Peter,
>
> The Impedance range that the KAT2 will match will be greater on the higher
> bands than the lower (just because of the math in the formulas for
impedance
> of inductors and capacitors). So I hesitate to guess at an answer becuase
> you did not specify a frequency - I can add up the inductor and capacitor
> values and give a range for each.
>
> With a bit of work with a program like TLW (www.arrl.org), one could
> determine the impedance range for each band. It is an L network tuner
with
> a series inductor range from 0 to 20.62 uH in 0.16 uH steps; while the
shunt
> capacitor can range in value from 0 to 2423 pf in 10 to 12 pf steps. The
> shunt capacitor can be at either end of the inductor. Only the min and max
> values need to be entered for each component and configuration, so there
> would be 8 calculations for each band of interest.
>
> All in all, it is a wide impedance range, but will be more restricted on
160
> meters than on 10 meters. This same principle applies to all Elecraft
> tuners and to other manufacturers of similar L network designs.
>
> 73,
> Don W3FPR
>
>
> > -----Original Message-----
> >
> > Is it something like 5-1000 ?
> > Can't find no indication wherever.
> >
> > Peter, PE1E.
> >
>
>
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