The KF35 is a variable μ pentode for battery radio equipment. The KF35 would have been used for mainly IF amplification and the gain would be controlled by the AGC line altering the negative grid bias. The control grid was taken to the top cap to minimise the interaction of the grid and anode circuits.
The envelope is 30 mm in diameter and, excluding the IO base pins, is 80 mm tall.
References: 1951 Datasheet & 1040. Type KF35 was first introduced in 1946.
Absolute Maximum Operating Conditions¶
PDF scanned from an original document held by the museum
Updated April 09, 2013. shape:wide.glass.tube construction:pinch type:pentode age:1940.1950 base:io heater:2.0v pins:8 pin:1.m pin:2.f+ pin:3.a pin:4.g2 pin:5.g3 pin:6.- pin:7.f- pin:8.- pin:tc.g1