[Amps] Zener Screen Regulators

[Mike A]

On Thu, Sep 06, 2012 at 08:10:13AM -0700, Bill, W6WRT wrote:
> ORIGINAL MESSAGE: 
> On Thu, 06 Sep 2012 08:42:39 -0500, Rich wrote:
> 
> >I have heard, thru the years that there is electron flow without the 
> >filament or cathode being heated
> >although it is very little.
> >with the filament or cathode being heated ,there is a "boiling off of 
> >electrons"so to speak
> >and the process is greatly accelerated .
> >make any sense ?
> >"Rich"
> 
> REPLY: 
> Yes.

I'll expand a bit on Bill's somewhat terse answer: you may want to
google on the term "thermionic work function" -- _with_ the quotes. 

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin