RE: new single 833A VTTC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "David Trimmell" <humanb-at-chaoticuniverse-dot-com> 

Steve, yes staccato has improved spark performance greatly, and tube
life! My uncle who is a radio engineer, told me about a AM station he
work on many years ago that was using 4 833A's in the output. The
station was still putting out a good signal, but it was time for Tube
rotation and one of the four tubes had been running so hot that the
glass melted enough that a part of the glass envelope was sucked in
towards the plate! It was about the size of a quarter on the outside and
made it nearly too the plate. He had it displayed as a lamp in his house
for many years. The tube was still functional!

And BTW, one heck of a VTTC you got there!

Regards,

David Trimmell

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Monday, December 22, 2003 7:33 PM
To: tesla-at-pupman-dot-com
Subject: RE: new single 833A VTTC

Original poster: "Steven Ward" <srward16-at-hotmail-dot-com>

Actually, i just looked at the voltage again just now, it looks like
only
10.3V or so.  Im not terribly worried about tube lifetime anyway.  I ran

the coil again today for a long time at 15pps.  At 22" the plate is just
a
tad bit colored, at 20, it gets more noticable, and at 30pps its
probably
at about its limit, or at least as far as i would push it.  It makes me
wonder how people got long sparks before the use of staccato!  It seems
that the tube would be running incredibly hot really.  Did people just
run
the plates bright red?  Or am i still missing something with my design?

Steve

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