RE: [TCML] Tuning a Tesla Coil with an Oscilloscope

["S&JY" <youngs@xxxxxxxxx>]

An improved way to tune your coil is to temporarily attach a length of wire
to your toroid, and suspend it out horizontally with a piece of string.
Make the wire the length you expect your streamers to be.  The wire will
approximate the extra capacitance your streamers will add to your toroid,
lowering the secondary frequency to about what it will be when operating.
Then just tune your primary to the secondary.

 

Be sure to stay several feet away from your secondary when you are tuning
your primary.  Your close proximity to your secondary will artificially
lower the secondary resonant frequency.

 

Another good way to tune your coil is with a grid dip meter, or it's solid
state equivalent.

 

Steve Y.

 

  _____  

From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Phil Tuck
Sent: Friday, February 04, 2011 10:27 AM
To: 'Tesla Coil Mailing List'
Subject: RE: [TCML] Tuning a Tesla Coil with an Oscilloscope

 

I have used one of those devices when I did a side by side test with the
scope method and the device I used was fairly accurate and I was impressed
with it. If you wanted to tune the primary low allowing for streamer loading
as well, then the scope method may have the edge as that will get within an
accurate 1 kHz.

Regards
Phil

www.hvtesla.com

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Brandon Garretson
Sent: 04 February 2011 13:48
To: Tesla Coil Mailing List
Subject: Re: [TCML] Tuning a Tesla Coil with an Oscilloscope

Heres a great Youtube video explaining the exact method you guys are talking
about.

http://www.youtube.com/watch?v=Euy2U92I8e4

But after spending too much time and money on sketchy, inaccurate used
equipment I built one of these.
I have personally had great results with this little device, I highly
recommend it..

http://www.rmcybernetics.com/projects/DIY_Devices/homemade_tesla_coil_tuner.
htm

 - The other Brandon



On Fri, Feb 4, 2011 at 8:03 AM, Phillip Slawinski <pslawinski@xxxxxxxxx>
wrote:
> Brandon,
>
> You can find the resonant frequency by driving the base of the coil
> with a signal generator.  It helps if you have an idea where the F0 is
> to begin with.  You don't have to hang the probe next to the
> secondary, it can be sitting near the coil, on some object that isolates
it from the ground.
> (also you could clip the probe to a length of wire to act as an antenna).
> Basically what you're looking for is the frequency input from the
> signal generator that gives the maximum amplitude on the scope.
>
> -Phillip Slawinski
>
> On Thu, Feb 3, 2011 at 16:25, Brandon Hendershot <
> brandonhendershot@xxxxxxxxx> wrote:
>
>> Hi All,
>>
>> I got an old O-scope earlier this week and want to try to find the
>> resonant frequency of my coils with it.
>> What methods do you guys use? I know of one that involves using a
>> signal generator to tune in the coils res freq with the O-scope probe
>> hanging near the secondary.
>> Only problem I have with that, is I cant figure out how to read off
>> the scope when I've reached res freq..
>> Any suggestions as to what I'm doing wrong?
>>
>> Thanks,
>> Brandon
>> _______________________________________________
>> Tesla mailing list
>> Tesla@xxxxxxxxxx
>> http://www.pupman.com/mailman/listinfo/tesla
>>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
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