RE: [TCML] The Hammertone Predikter

["Brian" <brianv@xxxxxxxx>]

Hi Terry,
Say you mentioned that you use optical for switching how well does it work
for you, I thought about it but I figured the switching frequency would be
to fast and the optical would not turn off in time but apparently that is
not the case have you had any problems using them? And what frequency are
you switching at?? I may still play around with that methodology.

Thanks

--Brian

-----Original Message-----
From: piranha [mailto:piranha@xxxxxxxxxx] 
Sent: Monday, June 29, 2009 4:33 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] The Hammertone Predikter

Hi Finn,

> It would be interesting to do ring ups and all to find the phase 
> error.  At least to see which way to select the components to minimize 
> it.  Also to pump in some faults to see how the circuit performs.  But 
> it all looks "just fine" really...
>
> Are you saying that the delay changes with amplitude? Richie said 
> something to that effect too. 
No, the phase or timing is not affected by amplitude.  You and your 
video are correct.  But assuming a ring-up signal would make the 
equation a bit longer and perhaps more accurate.  It would not change 
the real numbers much though.  Basically one would assume an input of:

w / ((s + a)^2 + w^2)  instead of  w / (s^2 + w^2)

That's EE stuff that some on the list will know about.  But I am not 
sure if I am smart enough to do it...  I might check it in MicroSim to 
see if it is worth thinking about.

Making the response flat might be very difficult.  The same forces that 
flatten the response would also tend to ruin the function of the 
Predikter.  But there might be some wonderful way to do it.

You can make the comparator matching anyway you want.  The equations can 
help with that.  Your method seems fine to me but another parson might 
have a different method that works well too.  There are many ways to do it.

> MicroSim, equations, scope pictures, real working coils!!!! - It might 
> actually work!!!  :D  :D  :D
>
> Might?
> Anyway, If there are tests that I can do to confirm theory, let me know. 
I was joking.  ;)  It works fine.

> Back to big gate transformers.
Oh darn.  I think I am the only one still to use optical gate drive.  I 
though everyone would be using it by now.  But everything is changing 
very fast now.

Terry





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