Sensibly equivalent¶ to:
The 20P4 is purpose designed as a television line output valve.
In September 1953 Mazda described the 20P4 as having a redesigned g2 with consequent reduction in screen dissipation and increase in power handling on positive pulses. The sensitivity of the valve has also been increased.
The valve can withstand a positive anode surge of 6 kV. The screen grid can dissipate 5 Watts.
The wide glass tube envelope is 28 mm in diameter and, excluding the IO base pins, is 88 mm tall.
References: Data-sheet & 1040. Type 20P4 was first introduced in 1953. See also 1953 adverts.
Absolute Maximum Operating Conditions¶
Updated January 03, 2022.