26-02-2016, 01:26 PM
(This post was last modified: 26-02-2016, 01:27 PM by Geordie McBoyne.)
Hi Andy,
The big surprise is the low current consumption of the TT1, it's only 1.7amps @ 10 volts.
17watts! Compare that with an all valve 14" TV, about 150watts. The PTV does not employ a wasteful heater chain voltage dropper so possibly there will be a useful reduction of current consumption.
The voltage regulator. A simple series regulator could be employed using an AD149. Or, the original nine cell NiCad battery pack can be reintroduced into the circuit.
The latter solution will make the set fully portable.
Geordie McBoyne.
The big surprise is the low current consumption of the TT1, it's only 1.7amps @ 10 volts.
17watts! Compare that with an all valve 14" TV, about 150watts. The PTV does not employ a wasteful heater chain voltage dropper so possibly there will be a useful reduction of current consumption.
The voltage regulator. A simple series regulator could be employed using an AD149. Or, the original nine cell NiCad battery pack can be reintroduced into the circuit.
The latter solution will make the set fully portable.
Geordie McBoyne.
