Larger amounts of residual gas can create a self-sustaining visible glow discharge between the tube elements. This page was last edited on 14 November , at Sweet Retro Tube
As electronic engineering advanced, notably during World War II, this function of a diode came to be considered as one type of demodulation. Tungsten wire has a very low resistance when at room temperature.
As a cost reduction measure, especially in high-volume consumer receivers, all the tube heaters could be connected in series across the AC supply using heaters requiring the same current and with a similar warm-up time. Cuckold The First Day Vintage.
Power is also dissipated when the electrons from the cathode slam into the anode plate and heat it; this can occur even in an idle amplifier due to quiescent currents necessary to ensure linearity and low distortion. By multisection tubes had become commonplace.
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