Re: Another toroid question
In a message dated 12/26/98 2:10:39 AM Pacific Standard Time, tesla-at-pupman-dot-com
Your reply got me thinking of a way to measure the capacitance change when I
add the second toroid. I worked backwards through the formula, (using
WinTesla), inputting the change in tuning to arrive at the change in the top
load capacitance. This roughly gave me the following: When I added the 6 x19
toroid on top of the 4 x 15.5 one the primary tap changed 1.3 turns. This
works out to about a 9pf increase in capacitance, a total of 28pf. Does this
seem right to you? I am going to try attaching the second toroid as you
The coil was a big hit with all of our Christmas party guests, (inlaws),
they were quite impressed!
Yes, it sounds reasonable to me. Let us know if increasing the toroid
separation produces similar results - i.e. increasing the number of turns on
the primary required for resonance.
It is fun to demonstrate you coil to friends, relatives and basically whoever