9 Nov
2005
9 Nov
'05
9:53 a.m.
Subject: Re: FPGA VAX update, now DIY TTL computers
From: "Chuck Guzis" <cclist at sydex.com>
Date: Wed, 09 Nov 2005 09:46:07 -0800
To: cctalk at classiccmp.org
On 11/9/2005 at 10:46 AM Allison wrote:
Not much after that. An idea that came too late in the game.
If anything there were more unique designs in the gated beam, sheet beam
and segmented cathode (power tubes) that evolved.
Allison
The serious limitation for tubes has always been
the heat and power
from the filament rather than the heat and power used for functional
circuits.
So whatever happened to tunnel cathodes? It was a very hot topic in the
60's.