The QQE06-40, from Mullard's owners Philips, appears to be an earlier form of the european pattern double tetrode. It is taller and there are no obvious sign of the internal neutralising capacitors. The QQV06-40A from Mullard was a standard valve for VHF transmitters of medium power.

Mullard do not give a value for the 'E' in their naming convention for transmitting valves but we have another valve with the 'E' and that is marked Mullard.

The wide glass tube envelope is 43 mm in diameter and, excluding the B7A base pins, is 87 mm tall.

 
Pin Connections

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

 
Absolute Maximum Operating Conditions

Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	mAg	Pdriv	Pout	Pdiss	freq	f.max
	6.3	1.8	600	250	-80	200	18	7	3W	90	40W	275	486

Thanks to Frank Philipse for supplying the above datasheet

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