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Re: Terry's Tesla Coil Tuner
Original poster: "Mike Harrison by way of Terry Fritz <twftesla-at-uswest-dot-net>" <mike-at-whitewing.co.uk>
On Thu, 08 Feb 2001 07:55:53 -0700, you wrote:
>Original poster: "Bert Hickman by way of Terry Fritz
>Very nice project - simple but it should be quite effective!
>I would suggest a couple of minor revisions to the test procedure to
>improve accuracy of tuning:
>1. The secondary measurement should be done with the secondary in
>position and centered within the primary. The primary should be
>disconnected from the rest of the system, and ONE end tied to ground.
>This will give you Fo of the secondary in-situ.
>2. Primary Fo must be measured with the secondary FAR away from the
>primary (10 feet is good... :^)) to make sure there's no coupling
>between the two. Otherwise you may get confusing measurements. Adjust
>the primary inductance so that Fo matches that of the secondary (above).
>Great job, Terry!
>-- Bert --
One problem I've found with using square waves for tuning is that you
can get strong responses at harmonics.
Have you tried using a single-colour LED in series with the 555's
supply? (maybe with a parallel resistor)