Re: [TCML] secondary coil form

["drieben" <drieben@xxxxxxx>]

Hi Phil,

Yes, I also noticed that Cameron's latest videos
of his coil were labeled as "SRSG". I know for a
fact that he was originally operating his coil asynch.
He had a 10,000 RPM universal motor driven AR-
SG that he had purchased from Ed Wingate, I believe,
that he fired his coil with and he also had it fed through
a variac to vary the speed. However, these latest videos
appear to have been filmed just this past summer (2011)
and it's been nearly 2 years since I've been to Cameron's
place. We are a good 3 to 3.5 hours drive apart. It does
appear from the steady lower pitch "whine" noted in these
latest videos that he may indeed have changed over to
synch. The one time that I personally tried running my
Green Monster synch, the lower 120 bps in synch did
not give near as impressive of sparks as does my typical
~350 bps that I routinely run in asynch. Of course, I was
using the same voltage power supply and the same primary
cap, so I was probably cutting my power thoughput at least
by 1/2 (theoretically it could be as much as about 2/3, but
of course I realize that in async mode, not every bang is
going to occur at the peak of the sine wave, as in well-tuned
sync mode.)

David


----- Original Message ----- 
From: "Phil Tuck" <phil@xxxxxxxxxxx>
To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
Sent: Monday, February 13, 2012 6:22 AM
Subject: RE: [TCML] secondary coil form


David,
I saw Cameron has three videos of his coil, but two of them say it is 
running as SRSG, whilst the other is labelled, and behaves more like, ARSG. 
He doesn't alter the motor speed though, so hard to really tell.
Are the SRSG labels  a typo, or is the coil setup such that he can quickly 
change motors, and cap values easily as a comparison?
(I appreciate you personally may not know the answer - so apologies in 
advance if so)

Regards Philip Tuck
www.hvtesla.com.

.


-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf 
Of drieben
Sent: 13 February 2012 02:13
To: Tesla Coil Mailing List
Subject: Re: [TCML] secondary coil form

Carl,

I went to a local plastic supply company and asked for PVC "duct" pipe, of 
the 12" diameter variety. It is made for low pressure air duct ser- vice and 
has thin (~1/8" thick) walls. They had a 10 ft. piece of it and since at the 
time another fellow coiler was in town visiting me, we went in together to 
purchase it and then cut it in half so we would each have a 5 ft. long 
piece. Yeah, the large diameter PVC is a bit pricey (IIRC, around
$5 to $6 / ft, back around '03, I believe). Both peices are still going 
strong in their respective coils to this day, though (Green Monster is mine 
and the other is in Cameron Prince's big SG coil).
http://www.youtube.com/watch?v=t23mGSW2k6c
http://www.youtube.com/watch?v=KRAgO2Xn-t8&feature=related

David Rieben



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