27 Oct
2009
27 Oct
'09
7:32 p.m.
Triodes? 1907, Lee de Forest.
________________________________________
From: cctalk-bounces at classiccmp.org [cctalk-bounces at classiccmp.org] On Behalf Of Ben
[bfranchuk at jetnet.ab.ca]
Sent: Tuesday, October 27, 2009 6:39 PM
To: On-Topic and Off-Topic Posts
Subject: Re: TU56 lamp replacement
Chuck Guzis wrote:
On 28 Oct 2009 at 0:44, Pete Turnbull wrote:
I thought that was Pre 1900's there. Tubes ( triodes )were mostly understood
by then. I am using 45 tubes and they came out 1929 or so.
Pentodes came out in the 1930's. Radar in 1940's
and Electronic Brains[1] 1950's.
Amazing what you (think you) can do when
you're bored.
There's a guy on the web who makes his own (cold cathode) CRTs.
We're basically talking 1920's technology here, aren't we? --Chuck
[1] Now back on topic.