Re: What kinda tube?

• To: tesla-at-pupman-dot-com
• Subject: Re: What kinda tube?
• From: "Phillip D. Rembold" <prembold-at-gte-dot-net> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Sun, 04 Oct 1998 17:50:07 -0600
• Approved: terryf-at-verinet-dot-com

Looked in two different sources :
Tube Lore (L Sibley) 1996 and Vade-Mecum 1955
They don't show the prefix of  " NL- "  - - - -  but . . .
they do list both a 740 and a 740L as a Mercury / Argon Thyratron
most common use was as a Controlled Rectifier
Max. plate voltage : 1,000 volts
Max. plate current : 4,000 mA
Filament voltage : 2.5 volts
Filament current : 16 Amps
Pin layout :
1. heater
2. N/C
3. control gate
4. heater / cathode
T. anode

This tube will handle 4,000 Watts, but because the plate voltage is
so low it wouldn't be the ideal choice for Tesla operation.

Tesla List wrote:

> Original Poster: Teslaman-at-aol-dot-com
>
> I have a tube, unknown specs.  It is a NL-740L mercury vapor.

• Prev: RE: where to buy the big variacs??
• Next: my third coil
• Index(es):
  • Main
  • Thread