The 832 is an American dual transmitting tetrode. We also have the later 832A in the museum.

The design the American type with two separate valves sealed into the single element, contrast this with QQE03-20 which is the classic European pattern. In use the American valves require external neutralisation capacitors whereas the European type has the capacitors built-in.

This valve was obsolete by the start of the 1960s replaced by the QQV03-20 or QQV06-40A varieties. It is typical of these RF power tetrodes that the base connections all match one another.

The wide glass tube envelope reaches a maximum diameter of 56 mm, and excluding the B7A base pins, is 52 mm tall.

 
Pin Connections

B7A	1	2	3	4	5	6	7	tc	tc
	k bp	htap	g1(1)	h	h	g1(2)	g2	a(1)	a(2)

 
Absolute Maximum Operating Conditions

Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	mAg	Pdriv	Pout	Pdiss	freq	f.max
	6.3	1.6	500	200	-65	72	14	2.6	0.18W	26	15W	200	250

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 12 June 2007 {find valves by name}