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Secondary resonance freq
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From: Marco Denicolai [SMTP:marco-at-vistacom.fi]
Sent: Monday, June 08, 1998 1:47 AM
To: Tesla List
Subject: Re: Secondary resonance freq
At 09:14 06/06/98 -0500, you wrote:
>Hello Marco,All,
>
> You don't say how you connected the function generator and oscilloscope.
>The classic way is to feed the base of the coil with the sig gen then drape
>a wire connected to the scope near by and tune for Max radiation and hence
>reading.
>
>My computer program calculates your resonance at 337 kHz so 324Khz is
>definitely the fundamental.
Yes, that's the frequency at which I got the most attenuation.
>
>If your sig gen has a 600 Ohm output impedance (i.e. on the high side) I
>find it better to scope the output of the sig gen. You then tune for a null
>or minimum signal. The secondary coil, as a series resonator becomes and
>acceptor circuit and loads the output hence the signal goes down.
That's what I did.
>The
>advantage of this method is that you get much less mains born modulation on
>your scope. Also you get much less pickup of other radiation which can
>confuse the reading. Make sure the secondary is away from any primary
>circuits or other coils.
The secondary was alone apart from all the other TC hardware.
________________________________________________________________________
Marco Denicolai Vista Communication Instruments, Inc.
Hardware Development Manager www.vistacom.fi
marco-at-vistacom.fi Kaisaniemenkatu 13 A
fax: +358-9-622-5610 SF-00100 HELSINKI
phone: +358-9-622-623-15 Finland
Remember, Murphy was an optimist! I am not...
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