Re: Valve question
When in standby, the early Grundig remote control CTV sets used a series resistor in the heater circuit, but a negative voltage (-180 I seem to recall) was connected to the first anodes. This prevented the cathode poisoning as described above.
With the main switch off, the TV was completely off, but I seem to recall that the Saba of the same period left the set in standby at all times. Only the mains supply switch on the wall actually switched it completely off.
Les.
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