Vince Cockeram wrote: > > All, > Yes, notice the filament specs; > > > http://www.g8wrb.org/data/Svetlana/pdf/3CW20000A7.pdf. > Filament: Thoriated-tungsten mesh > Voltage: 7.50 > Current @ 7.50V: 100A > > How does this fit the JLN published data? Fred and Jones musings? > I noticed that before on JLN's May-June web page sketch of the "caged" filament.
The thoriated filament emitts about 1.0E5 times as much as a pure W filament at any given temperature This would make the filament resistance ~ 0.075 ohms at 2700 K and 0.008 ohms at 300 K. At 1700 K ~ 0.043 ohms, at 2000 K ~ 0.052 ohms and ~ 0.058 ohms at 2200 K. For 1324 watts at 2000 K, I = ~160 amps V = ~ 4.7 volts etc. Frederick > > Regards, > Vince Cockeram > > > > > ----- Original Message ----- > From: <[EMAIL PROTECTED]> > To: <[email protected]> > Cc: <[EMAIL PROTECTED]> > Sent: Wednesday, July 13, 2005 9:34 AM > Subject: Re: MAHG Parameters Correction > > > >> From: George Hathaway > >> > >> All, > >> Perhaps comparing Naudin's "tube" with an EIMAC > >> 3CW20000A power triode may be instructive. Frolov/Moller > >> probably obtained the Russian equivalent from St. > >> Petersburg, where he lives, from Svetlana (also in > >> St. Pete's). See > >> http://www.g8wrb.org/data/Svetlana/pdf/3CW20000A7.pdf. > >> > >> cheers - George Hathaway [EMAIL PROTECTED]
