Sensibly equivalent¶ to:
The ARP34 is a screened variable μ pentode designed for radio receiver use. The frequency range of operation would be up to 30 MHz and it was probably used as an IF amplifier. The commercial equivalent is the EF39.
Unlike most paint screened valves, this paint has a gloss. It looks like a clear varnish has been applied over the metal paint. Around the base cap the layer is translucent.
The ARP in the designation designates this as a pre-CV UK Army Receiving Pentode.
The reverse is unmarked.
The classic envelope is 30 mm in diameter and, excluding the IO base pins, is 85 mm tall.
References: Data-sheet, 1040 & 1043. Type ARP34 was first introduced in 1939.
Absolute Maximum Operating Conditions¶
Updated April 22, 2021.