Here's a screenshot of the smith chart plot.
The values differ slightly from the values calculated by TLW3B because
the smith chart program uses lossless components whereas TLW3B
uses lossy components specified by arbitrarily selectable Q.
Note the chart center (Z°) is defined as 2100Ohm (source) ,the load is 50 Ohm.
73
Clemens
DL4RAJ
>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]] On Behalf Of Clemens Paul
>Sent: Saturday, October 17, 2015 10:03 PM
>To: [email protected]
>Subject: LF: RE: RE: RE: TX Toroid Material
>
>Hi Ken,
>
>For the transformation by the T-pad I've used the well proven
>TLW3B by Dean Straw
>(it was / is(?) included with the ARRL Antenna Handbook).
>You can define unloaded Q for inductors and capacitors as well
>as the power level
>and it does all the calculations including V,A,W etc.
>As it does not provide not the lowpass T ,only highpass,I've
>converted the values
>to low pass using RFsim for convenience.
>Then I did a cross check using a smith chart program by
>Dellsperger,Smith V2.02,
>and the calculated values proved to be spot on.
>
>You may send me your spice simulation per PM and I'll try to find out
>what's wrong with it.
>
>73
>Clemens
>DL4RAJ
>
lowpass-T_475kHz.png
Description: PNG image
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