The VR53 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 VR in the designation designates this as a pre-WW2 Royal Air Force receiving valve.

This is another example of this type that we have in the collection, and in this case it is encased in the classic shape of glass envelope.

The classic envelope is 29 mm in diameter and, excluding the IO base pins, is 83 mm long.

 
Pin Connections

IO	1	2	3	4	5	6	7	8	tc
	m	h	a	g2	g3	-	h	k	g1

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	6.3	0.2	250	250	-2.5	6	1.7	1.5M	2.2

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This exhibit was last updated on 04 August 2006