I'm sorry but this method is nice in theory, but has nearly nothing to do
with reality and if done as described, it is completely useless because it
doesn't give you the real frequency under load conditions.
In reality a conductive streamer or arc is "nailed" at the topload, which
acts as a form of antenna and lowers the resonant frequency of the secondary
extremely.
So if you do this test you have at least to connect a thin wire to the
topload, which "simulates" a streamer, when the coil is running later.
----- Original Message -----
From: "Bart B. Anderson" <gort@xxxxxxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Friday, April 04, 2014 3:55 AM
Subject: Re: [TCML] Secondary Resonant Frequency test ??
Very easy...
1) disconnect the bottom wire to your secondary and connect the generator
output to it (square wave is fine)...
2) power up the scope and let a piece of wire (12" or so) dangle from the
probe and place the probe about toroid level and about 6 feet from coil.
3) sweep the generator increasing frequency while keeping an eye on the
scope...
When your scope shows a sine wave with the largest peak, that is your
fundamental frequency.
That's is the most basic.
Take care,
Bart
On 4/3/2014 4:32 AM, matty mcqueeney wrote:
does anybody know any ways I could test the resonant frequency for the
secondary using a generator and a scope? I have already done the primary
and got the correct results.