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Re: GL-434A tube (specs wanted!)

Original poster: "brian by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ka1bbg1-at-mcttelecom-dot-com>

Carl, the 4x150 is forced air cooling, much like its huskier 4cx150.....I
didnt find the 434 in my books. cul brian
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, February 13, 2001 8:33 AM
Subject: GL-434A tube (specs wanted!)

> Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> 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
> I will try to revisit the concept of an ultra-cheap, small MOT-powered
> 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
> of the tube tesla coil.
> Thanks for any info regarding the GL-434A.
> Carl