Re: Best break-rates, was: additional transformers [rolled caps]

From: 	FutureT-at-aol-dot-com[SMTP:FutureT-at-aol-dot-com]
Sent: 	Friday, August 08, 1997 4:12 AM
To: 	tesla-at-pupman-dot-com
Subject: 	Re: Best break-rates, was: additional transformers [rolled caps]

In a message dated 97-08-07 08:45:31 EDT, you write:

<< I just wanted to say in reference to your 360 BPS suggestion that I 
> have personally found ~ 402.5 BPS (14 stud rotary wheel on a 1725 RPM 
> non-synchronous motor) to be really sweet.  A wheel with 12 studs 
> yielding ~345 BPS was significantly less impressive in my MTC unit, all 
> things else being identically equal.  I guess there is an ion channel 
>lifetime effect difference happening here that is better at the 
> slightly higher break rate of 400,  but suspect a supply sinewave 
>filling factor or synchronizing benefit also as the break pulses 'walk'
> the 60 cycle mains phase in a slightly more concentrated manner.
> The Twin system which I have recently built really comes alive in 
> this  400 PPS regieme, and is noticeably less remarkable at slower 
> rates, including attempts to set the non-sync DC rotary break motor 
> to run synchronously at 120 BPS (due to large wheel inertia and 
> variac control I can successfully ride the crest of the sinewave peaks for
a few
> seconds at a time).  I subsequently have no intention to operate the 
> Twin at 120 BPS synchronous,  nor any need to operate it's break rate 
> exceeding 402 PPS.
> rwstephens >>


I've been pondering this break rate issue on my coils also.  I wonder
if it is possible that the particular toroid size that you used was
"demanding" the extra power available at the slightly higher break-rate?
If this is the case, then the use of a slightly larger tank cap should 
compensate for the lower break-rate and give good performance also,
provided that quenching remains good, etc.   My point is that there
might not be any thing "special" about a break rate of 402.5, rather
your coil may simply be demanding the particular amount of power 
provided by that break rate.  A different coil may demand a different
break rate?  This is all speculation on my part.

I do agree that the sine-wave filling factor may be helping as
you said, at certain break-rates.

John Freau