Re: Idea for big VTTC

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

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Mddeming-at-aol-dot-com>

In a message dated 3/19/01 7:49:06 PM Eastern Standard Time, tesla-at-pupman-dot-com 
writes: 


>
> Original poster: "Drew Murray by way of Terry Fritz <twftesla-at-uswest-dot-net>" < 
> drewallmighty-at-hotmail-dot-com> 
>
> I was thinking about how one could build a really big VTTC or SSTC while i 
> was walking home from school today. the idea of building really large 
> semiconductors or big vacume tubes came upon me. Is it possible that if one 
> had a vacume pump and a vacume jar, could they construct a really big 
> vacume 
> tube for operation with a really big tesla coil. It would be interesting to 
> see the odd sparks produced by VTTC on a larger scale. Just an idea! Lemme 
> kow what you think. 
>                                                      Curious, 
>                                                      Drew Murray 
> _________________________________________________________________________ 



Hi Drew & All! 

The tube you are looking for is an RCA 5770 Power Triode. It's about 24.5" 
long and 9.5" in diameter. It needs both water and forced-air cooling, but 
with 17KV DC on the plate, it can output over 100KW! I know they were in 
production 1949-1969, but I don't know about after that. If memory serves me 
(and it doesn't always), I believe radio station WABC-AM (770) (NYC)  used 
these through the early 1960s. I think one sold on eBay last year for around 
$500, but if you can afford the power to run it, you can afford the tube and 
the plumbing. Comments/enlightenment anyone? 

Matt D.