[NewCandle] More FYI

[Jones Beene]

More on the diode from Mark S:

The fundamental resonance appears to come from the inductance of the 
secondary and the junction capacitance of the IN4148 diodes. I have 
attached the datasheet here. The secondary sees a complex capacitance 
from the two AP diodes -- however even a sinple LC resonance calculation 
shows that the figures agree pretty well. Here is a link to a good LC 
resonance calculator http://www.pronine.ca/lcf.htm.  If you want to tune 
further then set up a resonator on the primary side for the same 
frequency...

You could try to tune the two just out of phase -- this will result in 
the power beating between the input and output -- exactly the same as in 
good tesla coil design. This may work better than exact tuning as the 
total power transfered wont be any less but the higher voltages at the 
AP may reduce losses in power transfer there. It's hard to predict and 
the tight coupling of the primary and secondary may limit this approach.

Whatever you do -- tuning the primary side to the same frequency will 
certainty reduce losses in the AP and improve power transfer.

cheers

mark.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Diode_fast_switching_1N4148.PDF
Type: application/pdf
Size: 64316 bytes
Desc: not available
Url : http://ipdiscover.com/pipermail/newcandle_ipdiscover.com/attachments/20071103/5546622d/attachment-0001.pdf