[AMPS] 3/2 law, DAF, other musings

Peter Chadwick Peter_Chadwick@mitel.com
Wed, 22 Mar 2000 08:47:03 -0000


Steve says;

>Any mathematician out there who can expand (Vg + Vs/us)^3/2 ?

There's a graph in 'Care and Feeding' of IMD against grid volts/bias showing
the 3rd order  dropping to zero at certain power levels.

I suspect what is needed is to multiply out (Vg + Vs/us)^3/2 times (sinv1t +
sinv2t). One could then differentiate to find the points where the IMD terms
go to zero.

Just a few sums!

Additionally, the 3/2 law is not precise for all tubes - there are
variations in it.



73

Peter G3RZP



--
FAQ on WWW:               http://www.contesting.com/ampsfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm