CV309 @ The Valve Museum

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CV309

Sensibly equivalent^¶ to:

CV483 CV1510 QV04-7

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G8LSD Valve Collection

The CV309 is the CV1510 with plated pins. The commercial version of these valves is the QV04-7 single beam tetrode.

This design uses an early all glass envelope and base. The output is modest and the dissipation high in relation to the output. The efficiency as a Class C RF amplifier was 45% which is low for a Class C stage and this probably reflects the difficulty of working at 150 MHz at the time.

The wide glass tube envelope is 31 mm in diameter, and excluding the B9G base pins is 56 mm tall.

References: Datasheet & ¹⁰⁴⁰. Type CV309 was first introduced in 1947.

Pin Connections

B9G	1	2	3	4	5	6	7	8	9
	h	a	g2	g2	bp,s	k	g1	bp,s	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 PDF datasheet.

Updated October 05, 2013.

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