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Re: [TCML] VTTC Trouble - Help



Hi Bud,

Yes, I remember you and your son well. I finally did figure out
the second issue with the tube plate getting excessively hot with
only a small input power and the output sparks only reaching a
few inches. I had the grid coil leads wired backwards. Tube coils
are very picky about corret polarity. However, I think the stacatto
driver is likely toast and the internal guts of it are absolutely tiny.
Looks like I may be having to pay or barter someone to build me
another as I don't do microelectronics too well :^0

David




----- Original Message ----- From: "Bud" <bud@xxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Tuesday, September 09, 2008 9:56 AM
Subject: Re: [TCML] VTTC Trouble - Help


Hi Dave,

I saw you at ED's in rochester with my rotary gap. I too have had my share
of problems with both the VTTC and Stacatto unit.  One thing for sure I
found out the hard way.....you can't have the stacatto unit too close to the coil. The RF does a job on the small chip. You might want to E-mail Steve
as he is real good with the VTTC's.  You'll get it I'm sure of that.

Bud


----- Original Message ----- From: "David Rieben" <drieben@xxxxxxxxxxx>
To: "Tesla list" <tesla@xxxxxxxxxx>; "Cameron B. Prince"
<cameron@xxxxxxxxxxxxxxxxxx>; "Phillip Slawinski" <pslawinski@xxxxxxxxx>
Sent: Monday, September 08, 2008 11:33 PM
Subject: [TCML] VTTC Trouble - Help


Hey guys,

I have been spending the day re-packaging my vacuum tube Tesla
coil as the previous setup was not very asthetically pleasing i.e.
it was plain ugly. Well once I got it back together on a better look-
ing frame, of course I had a few bugs to iron out. I finally got it to
running a bit again but there is a real problem. The stacatto con-
troller circuit -looks like- it's on all the time. Before I repackaged the
system, the stacatto controller could be turned on or off and when it
was turned off, the VTTC output would just be in continous mode.
Now, as I said -it looks like- it's on all of the time as the blinking
LEDs stay on all the time regardless of the switch position. However,
the output will now NOT go stacatto even though it looks to be on
all of the time. It seems that it has gone from bad to worse as I
had to remove the top 3" PVC end cap as it kept carbonizing inside
at the top of the 3" secondary coil. Since I took that off I've noticed
that now it seems that the coil is suddenly badly out of tune as the
plate will glow very brightly and hum at a relatively low variac setting
but the output spark won't get but just a few inches long. The only thing
that's changed is that I took off the carbonzed end cap and was just
letting the sparks come off of the end of the secondary wire lead.
I was originally getting close to 40" sparks in stacatto by "cheating" the
20 amp panel breaker and taking a 120 volt circuit out of my Green
Monster control panel with up to 100 amps capacity before having
to worry about tripping breakers, so things have really gone down hill
for me since remounting the system on a better frame. I'm pretty much
a VTTC dummy and just built this one loosely following this design:
http://www.stevehv.4hv.org/VTTC5/833Aschematic.JPG
Any suggestions from the VTTC gurus would be greatly appreciated.

Thanks,
David
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