Re: 4-125A, vacuum tube do's and donts

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

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

In a message dated 4/13/02 9:16:00 PM Eastern Daylight Time, tesla-at-pupman-dot-com 
writes:

<< Depends on the other circuit details.
 
    And there is the matter of how much current the
 
    filament/cathode combo can supply and the separate
    matter of how much power the plate will handle.
 
    BEST
    dwp >>
Well the plate will handle 125watts.So thats not much current -at-3000volts.Like 
41ma maybe.So i dont want to let this MOT rip and then the tube melts down.I 
managed to remove the old 3.18volt filament winding and replace with a 5volt 
winding.PAIN IN BUTT but done.Havent tested it yet.Im just afraid of letting 
full MOT power loose.I guess I need to get over it soonin order to measure 
some filament voltage.Any way to switch on the plate voltage AFTER the 
filament has warmed up?Keep in mind it will be at least 3kv to switch.Righ 
tnow im going to just get 2 MOTs and use one for a plate source an dthe other 
for filament.Its just goin gto be HEAVY!!!!!I want to carry this thing around 
for demos.I also plan to COMPLETELY enclose the MOT's cuz I dont want to 
die:-((((.Also, where do I get a 3kOhm 100W resistor????

Matt