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Re: What this beast really is? (Re: Fw: frequency (fwd))

In a message dated 4/27/99 3:39:58 AM Mountain Daylight Time, 
tesla-at-pupman-dot-com writes:

> 
>  - how do you plan to phase-synchronize the free oscillations of two 
> consecutive
>  bangs (or am I missing something)?

I am planning to use a 20 turn presicion pot to adjust the timing.  I think 
it should be reasonbly easy to adjust the timing with this.  I may have to 
narrow the range to gain better control, but won't know until I try.  It 
would be a small matter to change the timing resistor in order to achieve 
this.

>  - I'm not a transformer expert, but the number of turns for a given 
voltage 
> and
>  a given flux density B is inversely proportional to the operating 
frequency:
>  lower frequency -> more turns. This means that to operate at 1/4 of freq.
>  (20kHz/5kHz) you should need more turns in both primary and secondary.
>  Otherwise
>  you are at risk of saturating the core. More experienced guys can comment 
on
>  this.
>  
    You are perhaps correct in this and that is something I will have to 
experiment with.  I have tried, but have failed to find someone who can tell 
me enough about ferrite core transformers to say this will work as planned. I 
can't even find information on the particular ferrite material the cores are 
made from.  
     I may wind up having to go to a higher pulse repeitition frequency than 
planned, but I will find this out and then design the TC based on the 
results(assuming it works of course).  It would not be problematic to 
redesign the TC and in fact the higher frequency might work even better.    
The one thing I have going for me for sure is that the transformers were free 
and the rest of the components only cost about $35, so there is no great 
loss, if I cannot make it work.  If it doesn't work as planned, I will scrap 
the idea, readjust the pulse repitition rate to 20kHz and have a nice 30kVDC 
-at- 160ma power supply for use with a rotary gap. 
    I wonder how dangerous it would be to have a rotary gap with 16 
electrodes spinning at 20000 rpm :o) 
Mike