Our specimen of QV04-7 is incorrectly labelled by the previous owner. The actual designation was a CV number but this can not be read.

This single beam tetrode looks like an early all glass envelope design. The output is modest and the dissipation high in relation to the output. This suggests use as a frequency multiplier rather than a class C power amplifier. Alternatively the design was just not efficient.

The wide glass tube envelope is 32 mm in diameter and, excluding the B9G base pins, is 58 mm tall.

 
Pin Connections

B9G	1	2	3	4	5	6	7	8	9
	h	a	g2	g2	s-bp	k	g1	s-bp	h

 
Absolute Maximum Operating Conditions

Beam Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	mAg	Pout	Pdiss	freq	f.max
	6.3	0.6	300	250	-50	44	6	0.4	7.7	7.5	60M	150

Thanks to Frank Philipse for supplying the above datasheet

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This exhibit was last updated on 10 June 2007 {find valves by name}