[Amps] Tetrodes

[gdaught6@stanford.edu]

On 12 Jul 2005 at 15:37, Ian White GM3SEK wrote:

< snip >

> >Flashover from the positive anode produces negative screen current?
> >Now there's a new one.
> 
> Yes. Sit down and work it out.

You bet it can!  Current from the anode supply enters the anode in 
the usual direction (this is Ben Franklin's current, not electron 
flow) and follows the arc inside the tube from anode to screen grid.  
It LEAVES the screen grid and goes OUT the screen terminal to the 
outside world (i.e. the screen supply), contrary to the usual 
direction, and that's NEGATIVE screen current.

73,


George T. Daughters, K6GT