RE: [TCML] Using unequal electrode spacing's, was Setting optimal phase angle of SRSG motor

["Phil Tuck" <phil@xxxxxxxxxxx>]

Thanks John,
I can see what you are saying regarding the efficiency, rather than just the
design and timing, allowing it to draw more power. An overall consequence is
that the power factor shows an increase as well. 
Anyway I will still go ahead for next year, as it seems worth pursuing.
Deciding on the timing to use will be the tricky part, and getting the phase
correct with your phase controller will be interesting, as you will not be
able to listen to the change of sound like a recent thread discussed.
Richie mentions the difficulty of changing rotors to compare results, so
with this in mind I intended to use taper lock type hubs. It should be
possible then to swop in a couple of minutes in theory at least [grin]

Regards
Phil

www.hvtesla.com

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Futuret
Sent: 07 December 2010 22:48
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] Using unequal electrode spacings, was Setting optimal
phase angle of SRSG motor

Phil,

I think I had seen that, but I did my own work with unequal gap spacings
before Richie did his work.  In my work I didn't actually calculate or
simulate the effect, I just used my judgment for the spacings, then verified
that I was getting equal sized bangs using a scope.
Because I just estimated the proper spacings, my bang sizes were not exactly
equal in amplitude but were quite close.  

Regarding improvement, it depends on how you look at it.  Yes the system
will draw a lot of power and give longer sparks.  What's not clear to me is
that efficiency is increased.  In other words does it give longer sparks for
a given input power?  Certainly if a particular system tends to draw more
power, it will tend to give longer sparks also.  From what I remember I
didn't actually get longer sparks for a given input power, compared to a
system using equal gap spacings for the same input power.  I was using a
potential transformer to power the coil, so I was able to adjust the
ballasting as needed.
I didn't try the system using NST (current limited) transformers. 

I can't remember all the details of my tests, so I can't feel too confident
in what I'm saying.  I just reported what I remember.  
I remember thinking at the time that the extra complexity didn't seem worth
the effort.  

It might be a good idea to do your own experiments, and let us
know what you find.   

Cheers,
John

 

 


 

 

-----Original Message-----
From: Phil Tuck <phil@xxxxxxxxxxx>
To: 'Tesla Coil Mailing List' <tesla@xxxxxxxxxx>
Sent: Tue, Dec 7, 2010 5:29 pm
Subject: RE: [TCML] Setting optimal phase angle of SRSG motor


John,

I presume you have seen this page many times of Richie's

http://www.richieburnett.co.uk/offset.html

I was seriously thinking of trying it for next year, but you have had no

improvement your saying?



Regards

Phil



www.hvtesla.com





-----Original Message-----

From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf

Of Futuret

Sent: 07 December 2010 20:54

To: tesla@xxxxxxxxxx

Subject: Re: [TCML] Setting optimal phase angle of SRSG motor


If I remember correctly, it's not necessary to use unequally spaced

electrodes to get equal bang sizes at 200 bps.  

I've done various experiments with unequally spaced electrodes but I didn't

generally obtain longer sparks for a given input power.  

John



 



 





 



 



 
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