[GreenKeys] LTSpice

[Ralph Mowery]

----- Original Message ----- 
From: "Jeffrey D Angus" <jdangus at att.net>
To: <greenkeys at mailman.qth.net>
Sent: Friday, July 19, 2013 3:19 AM
Subject: [GreenKeys] LTSpice


> If you've got a flair for design, I highly recommend this program.
> <http://www.linear.com/designtools/software/>
>
> I was playing with it tonight optimizing a snubber to go across
> the loop keying.
>
> looks like 0.22 uF and 22 ohms in series will keep things civilized
> with adding too much distortion.
>
> A bit of trial and error certainly beats wading through all the
> calculations in this.
> <http://www.ee.bgu.ac.il/~pel/links/DESIGN_OF_SNUBBERS_FOR_POWER_CIRCUITS.pdf 
> <http://www.ee.bgu.ac.il/%7Epel/links/DESIGN_OF_SNUBBERS_FOR_POWER_CIRCUITS.pdf>>
>
> Jeff-1.0
> wa6fwi
>

What hapens when you plug in the values of .1 uf and 470 ohms ?  That is 
what Hoff used in his design from about 40 years ago.  That is for a loop 
voltage of around 150 volts and 60 ma.