[Elecraft] Elecraft DL1 Wideband Dummy Load

[Don Wilhelm]

David,

Golly, I can't answer that since I didn't design it.  I can only guess that
the diode compensation factor works better if the voltage is converted to
peak.

73,
Don W3FPR

"Life is what happens when you are making other plans"
(John Lennon wrote it in a book, Mike Cross used it in a song - I don't know
who was first)

----- Original Message ----- 

> I can understand that, Don, but why convert to peak?  Don't we measure
> power in r.m.s?
>
> 73 de David G4DMP
>
> In a recent message, Don Wilhelm <w3fpr at isp.com> said....
> >The 0.15 volts has to be a compensation factor for the diode
non-linearity
> >at low power levels.
> >The rest of the formula is correct though - Start with the basic formula
for
> >power V**2/R  (V is the RMS value in this formula) and manipulate it for
> >zero to peak voltage, you end up with ((V(0-p))**2)/2R, so since the
formula
> >given does convert first from RMS to zero to peak voltage, then adds the
> >compensation (0.15), you have to have 2 times the resistance in the
> >denominator - just math stuff.
>