Dead 833s? (was:RE: new single 833A VTTC)

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

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

Wow Dave!  I think i heard someone else mention mutated 833s as well (Dan?).

Just wondering, has anyone killed an 833A in VTTC service yet?  If so, what 
was the failure and what was the cause??  I for one am very curious!  Even 
more curious as to how far you could push one of these tubes before they 
give up.

Steve


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: RE: new single 833A VTTC
>Date: Tue, 23 Dec 2003 12:38:40 -0700
>
>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
>
> >>>>>SniPPPPPPPPPPPPPPPPPPPP
>

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