on-line calculators when modifying or building reactive loads

[dai h.]

this site has some nifty calculators (seemed to be the best of their kind so far as I've been able to find) when trying to mod (such as change the resonant frequency) or build an inductive load with the info at the Aiken site or Plate to Plate:

http://www.lautsprechershop.de/tools...ls/main_en.htm

also has a sinewave generator and oscilloscope software.

for comparison/reference:

http://www.schematicheaven.com/marsh...powerbrake.pdf

http://www.blueguitar.org/new/schem/marshall/se100.pdf