Re: [TCML] Stuck at 36"

[johnbrooks@xxxxxxxxxxx]

hello bigjohn,the first thing I notice is the
primary ID is about an inch or so too big.
joe
On Sat, 10 Jan 2009 23:39:50 +0000, b.jbohn@xxxxxxxxxxx said:
> Hello everyone, first time here (great site!).  I've built a coil that
> refuses to put a streamer past 36" to a grounded plate suspended
> vertically at the top of the secondary.  Occassionally I'll get one
> 41-42".
> 
> I'm using NST's 1@60Ma 7.5kv 4@30Ma 7.5kv all hooked together.  I think
> they're all okay because if I remove any one of them from the system
> performance diminishes.
> 
> The secondary coil that I've had the best luck with is wound on a 5-1/4"
> varnished paper tube winding length 22-1/2" the wire is .014 or #27
> magnet it's 1,607 turns 2,208 feet.
> 
> My capacitors are a mixed batch of homemade HDPE plate type.  
> 
> Caps #1 & 2 each contain aluminum plates 10 x 12" 16 plates each .090
> HDPE between each plate
> 
> Caps #3 & 4 each contain aluminum plates 4-1/2 x 9" 40 plates each .060
> HDPE between each plate
> 
> Cap #5 rolled type in oil .01583 MFD
> 
> All capacitors are in oil.  
> 
> My spark gap is a segmented type with 10 copper tubes 7/8 OD 5" long
> total space between gaps is .150" just enough so the transformers can
> break.
> The gap is also blown with a fan.  
> 
> My primary is a 1/4" copper tube conical 15 degree 14 turns 23" OD 7-1/2"
> ID seems best tapped at 12 to 13 turns.  I'm using a spun toroid it is
> 4-1/2 x 18" that size seems to work the best although if I put a 6"
> sphere on top pretty cool stuff happens (the streamers jump around the
> toroid and ball).  I have other secondaries that I've tried but this one
> is the best.  I have looked at other coils on this listing and other
> websites and I think mine should be doing better than 36".  Any input
> appreciated!
> 
> Bill
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-- 
  
  johnbrooks@xxxxxxxxxxx

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