Re: High Power tube source?

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

Original poster: "David Sharpe by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>

Dave
Suggest you look at econco (www.econco-dot-com).  These guys
rebuild external anode power tubes for induction heating, high
power "big science" arena...

A good possible candidate tube is a 3CX2500H3.  Will set you
back about $650 without a "dud" (blown tube).  These tubes
are very plentiful according to rep, capable of up to 10kW into
tank (6kV -at- 3A), and unless you SERIOUSLY exceed
electrode ratings will outlive you in VTTC service.  Will need
at least a 240V, 30A input power feeder to start seeing results.

Also suggest you check archives, Ross Overstreet in fact built
a VTTC based on this tube and was getting very good non-
optimal performance before having to relocate due to job.

Regards
Dave Sharpe, TCBOR
Chesterfield, VA. USA

Tesla list wrote:

> Original poster: "Dave Hartwick by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <ddhartwick-at-earthlink-dot-net>
>
> I've not coiled for about 4 years. I want to continue some VTTC experiments
> started during the last surge of activity.
>
> I had been using 4 833a's (pulled from commercial transmitters) based on
> John Freau's circuits, but think I fried  3 of the 4. Don't know what
> happened. Failure to use parasitic suppression on each individual tube?
>
> Anyway--I'm looking for an affordable 2-5 kw tube suitable for this
> application. A used one with some life left in it may fit the bill. I've had
> a search of the web without much luck.
> Suggestions?
> DaveH