GL-434A tube (specs wanted!)

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

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <cwillis-at-guilford.edu>


Hi folks,

To continue the rash of recent tube coil posts, I am looking for info
regarding the GL-434-A tube.  It's a moderately sized external-anode
triode, probably for industrial purposes, made by GE, and that is the full
extent of what I know.  Internet databases are being elusive on this one.
So if you have a clue, please pass it on...

I am in the process of making a general-purpose level-shifted power supply
for tube coiling, based on a massive, recently aquired 2200-V plate
transformer.  This will replace my MOT-based supplies.  The transformer is
so big that I can probably put in way more than 120 V on the primary
without having it saturate, so I may be able to squeeze 3 kV out of
it...and give the 833 coil that I currently play with what it really needs
(and maybe more.)  

I also am about to acquire a bagload (literally) of used 4X150D tubes for
coiling purposes- one thing I want to know is how these convection-cooled,
high-frequency tubes work in VTTC's and to what extent they can be
overrated.  Also, since they cost less than the price of many used 811-A's,
I will try to revisit the concept of an ultra-cheap, small MOT-powered tube
coil that can be easily built and sold and is very safe.  I suspect this
tube type would be ideal for "plasma tweeters," one of the few applications
of the tube tesla coil.

Thanks for any info regarding the GL-434A.

Carl