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R: [TCML] SSTC (and VTTC)



Hi John, in your mail of May 1999 I have found your tests on 813 with
grid tied together, biasing screen grid, or screen+ control tied and
suppression grid grounded, and you had obtained 16" spark, in other
mails I have found spark lenght from 14" to 20"  using 803,813,845
tubes. In the mail of may 1999 you told also test with 4-125A with 5"
spark.

In this project you have reached 7" spark. The tube 813 and 4-125A has
the same plate power; why so difference in spark lenght? Is because The
old graphite plate tubes may support a big plate current running dark
red(4-125A can run at full power only with chimney and fan or make light
like a lamp)? or are for different mu?

Thanks

Vladi  

-----Messaggio originale-----
Da: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] Per conto
di futuret@xxxxxxx
Inviato: sabato 24 gennaio 2009 20.13
A: tesla@xxxxxxxxxx
Oggetto: Re: [TCML] SSTC (and VTTC)


Neal,

Yes, a VTTC is easier to build than an SSTC because the components are
larger and less finicky in some ways, and mistakes won't cause the 
components
to burn out as easily.  I have some VTTC's and schematics at my 
websites at:

  http://futuret.110mb.com

and at:

  http://j.futuret.googlepages.com

I just completed a small VTTC project using a 4-125A tube powered by a 
small
MOT.  The project gives 7" sparks.  I just added a couple of new photos
showing the completed project.  It's just a basic VTTC, nothing fancy.

An advantage of VTTC's is that the RF is less destructive to household
appliances, computers, etc.  After the VTTC is completed, you can add 
the
staccato (pulsed) feature if desired.  Building the staccato pulser is 
an easy
way to get involved in solid state projects.  The staccato pulser is a 
solid
state add-on to the basic VTTC project.

There are many other solid state schematics available on the web also.

John
--


-----Original Message-----
From: Neal Namowicz <neal@xxxxxxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Sat, 24 Jan 2009 1:13 am
Subject: Re: [TCML] SSTC


I think Rob has asked a question here that has been rattling around in 
the back of my mind, too. If I may expand the question a bit, what 
about a VTTC (vacuum tube tesla coil)? Would a vacuum tube coil be 
simpler to start with, and would anyone have
 a link to a basic tube 
schematic? For myself, I'd like to have a smaller, quieter coil that I 
could run more often, versus my current 4" sec. static gap coil. Thanks 
for your help, guys. 
 
Neal. 
 
 
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