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Re: [TCML] VTTC Coupling
Hi Dr. R,
You shorted much more aggressively than me. I tended to
be too cautious at times. Your results are fantastic !
I do expect the homebuilders to collapse again. There's
no real reason for their recent bounce. There's still too
much optimism out there I think, despite all the crashing
and bankruptsies. Some wild swings today, here and there.
Interesting about Buffet and energy. I am bullish long
term on energy, bearish in the short term. I don't know
about the tech stocks, I don't have a feel for them anymore.
That must mean they're being ignored at the moment.
I agree about the coupling. I remember getting the node
effect during some tight coupling tests.
John
---------
-----Original Message-----
From: DC Cox <resonance@xxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Mon, 15 Sep 2008 11:11 pm
Subject: Re: [TCML] VTTC Coupling
Yea, I've been short on 3 of the 5 major large US homebuilders for the
past
4 years, and so far, in the past 4 years, up nearly 850%!!
I think I will hold my short position in these stocks until next April,
then
dump it and cash in!
I'm wondering after all the dust clears in the next 24 months if the
tech
stocks will run rampant again, like in the 80's? There is a ton of
money
out there just waiting for that stampede to reoccur. I know Buffet is
playing the energy sectors very hard right now.
I would suspect that a coupling of around 0.18 to 0.2 would be the max
for
good performance. I had a pair of 811As in a VTTC once and set my
coupling
at
0.18. I also tried tighter coupling but the spark output actually
decreased. I think the energy reflected back into the primary circuit
started showing modes
of constructive and destructive interference hence decreasing the
output. I
noted values of 0.14 to 0.18 seemed to produce the very best results.
Regards,
D.C. Cox
On Mon, Sep 15, 2008 at 4:32 PM, <futuret@xxxxxxx> wrote:
Hi Dr. R,
My coupling was rather low on that coil at around 0.16 or 0.18
I think. I did some work at k = 0.35 but it was probably actually
k = 0.30 or so. At that point a giant flashover occured and
destroyed the primary and seconday. Cameron Prince uses
the raised grid coil. He's applying so much peak power to the system,
that he can only run it in staccato I believe. The extra high
voltage he's using may be changing things in some way, I don't
know. I'm not really sure what's happening in his coil to
explain the high grid coil. I've never heard of anyone
else using such a high position for the grid coil. OT: Nice
stock market action lately !
Cheers,
John
----------
-----Original Message-----
From: DC Cox <resonance@xxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Mon, 15 Sep 2008 6:04 pm
Subject: Re: [TCML] VTTC Coupling
John:
What coupling k value have you measured on your 833 coil? I would
guess
around 0.2 ???
What is possible before destruction begins?
I've read one person has his grid feedback coil nearly 40% up the
height of
the sec coil. And he's getting very good outputs.
Dr. Resonance
On Mon, Sep 15, 2008 at 3:34 PM, <futuret@xxxxxxx> wrote:
I don't think it would work well.
John
-------
-----Original Message-----
From: Phillip Slawinski <pslawinski@xxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Mon, 15 Sep 2008 3:50 pm
Subject: [TCML] VTTC Coupling
Is it possible to over couple a VTTC? I have a 3.5" secondary, and I
have
a
4.5" form that I could use for my primary. If I used the 4.5" form
would
this be taking things a little too far? Would there be any real
benefit to
doing this?
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