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Re: Question regarding PCB board in close proximity with Primary Coil (DRSSTC)

Original poster: "Daniel McCauley" <dhmccauley@xxxxxxxxxxxxxxxxxxxxxxxxxx>

Thanks Terry,

I'll give it a try.  Lots of new things to try with this particular coil!

Sorry, no autographs - i won't be distributing the book so i won't see it when it ships, but if you show up
to the RATCB teslathon this year, i'll be glad to sign it!!!!  :-)


Hi Dan,

Just put a loop of wire and an LED on a long stick and start probing around the primary with it. After a short while, you will get a good feel for where the fields are and how well they energize the LED. Possibly a useful toy for mapping out the primary fields and how they react to transformers and such (conventional coils).

You have already thought of just using a current transformer as a power transformer to run just about anything you want *;-))

Looking forward to your book this Friday. It is autographed? The antique show says that signed copies are far more valuable 100 years from now :-))



At 08:33 PM 5/7/2006, you wrote:
I just did some initial calculations, and i think i should be able to adequately illuminate a single LED from a 1-2 turn coil on a PCB board.

Primary Coil (12uH)
LED Coil (0.3uH) 1-2 turns, 2 inch diameter on copper board
Coupling (calculated with MANDK) k = 0.02 (LED Coil about 2.5 inches below bottom turn of primary) Avg Current for 300us pulse, 100Hz PRF is about 20mA. A bit high, but for a ballpark, not too bad.

Time to prototype!!!

"DRSSTC : Building the Modern Day Tesla Coil" Book - Coming on May 12,