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Re: When does your Heating usually go on?
Quote:
Originally Posted by Taf
Our earliest valve TV had 2 switches: the first turned on the heating elements to warm the valves, the second, operated a couple of minutes later, turned on the HT (High Tension voltages). This was to prevent cathode-stripping which ruined thermionic valves very quickly.
As I joined the RAF, thermionic valves were starting to be replaced by discrete transistors. A few years later we were up to our eyes in Integrated Circuits and logic boards.
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Wow! That takes me back to the RA17s we used at RAF Digby in the mid-70s…
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