Bob,
I actually have a lot of respect for the people that designed and built vacuum
tubes. And the difficulty in physically making them is mind boggling.
I understand that anyone that broadcasts high power still uses tubes to get the
required power levels. I heard about some that were actually water cooled -
internally, with deionized water! (I guess those can't properly be called
vacuum tubes, maybe electron tubes ;-))
Dan
you wrote:
Re: CS>The color of silver
From: Robert Berger (view other messages by this author)
Date: Mon, 14 Jul 2003 13:30:39
Dan,
I have four US letters patents on the use of semi's, and one of them is a solid
state replacement of a pentode in an oscillator circuit.
I change over the Bell System from electron tubes to a HIN that replaced
pentodes and tetrodes in situ. No circuit changes permited. We made
millions of then.They changed a voice grade line to digital grade in both the O
and N carrier systems.
When you want power it still is the vacuum tube that does it.
"Ole Bob"
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