[Amps] Zener Screen Regulators

[Bill, W6WRT]

ORIGINAL MESSAGE: 
On Wed, 5 Sep 2012 11:44:15 -0500, Rob wrote:

>>
>> I still ask for an explanation of why the filament or cathode in a tube has to
>> be heated to receive the current flow. I've been asking this question for fifty
>> years. Still waiting.
>>
>
>That's a different situation from charge transfer via direct contact
>with a conductor.
>
>rob
>k5uj

REPLY: 
Still waiting....

73, Bill W6WRT