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Old 8th Jun 2008, 5:29 pm   #18
XTC
Retired Dormant Member
 
Join Date: Oct 2004
Location: Bristol, UK.
Posts: 837
Default Re: Another (possibly silly) valve question

Special quality valves were developed for computer use where they could be without anode voltage applied for long periods. e.g. E88CC. The Brimar book says it and others were developed to achieve
this; their other SQ valves were designed for high vibration tolerance.

In a comms set, switching to transmit mode is usually only for a few minutes at a time and then the valve is powered normally.

Pete.
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