Hi Ron:
Well the analogy to solid state is that of a diode to a transistor, or
more accurately a FET.
The addition of a third element to a vacuum tube diode turns it into a
triode. The control grid creates the leveraged control element which
enables current control via a very small signal applied. It is the
grids physical proximity to the cathode that gives it the "leverage" it
needs to enable gain.
Simple answer.
Curt
KU8L
Ron wrote:
All,
Anyone interested in the Drake L-4B amplifier may be interested in a
new article I just released. This article is a redesign of the L-4B
amplifier which requires no external high voltage power supply. It is
completely self-contained. The article can be found on my Drake
website.
Follow the link, and click on the article link at the top of the page.
_http://www.wb4hfn.com/DRAKE/DrakePageHome.htm_
73, Ron / WB4HFN
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