The QQV07-50 from Mullard is transmitting double beam tetrode that was introduced in 1961. Primarily designed for push pull amplification in the VHF frequency range at powers up to 100W. In class C service the peak cathode current was given as 585 mA, the maximum average current being 130 mA.

Cooling was by convection or forced air and the valve was designed for mounting in any attitude.

As with all of these European pattern double tetrodes the neutralisation capacitors are internal to the valve.

Compared to the QQV06-40A the anode has additional cooling fins for better radiation of the heat.

The wide glass tube envelope is 41 mm in diameter and, excluding the B7A base pins, is 72 mm tall.

 
Pin Connections

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

 
Absolute Maximum Operating Conditions

Tetrode	Vh	Ah	Va	Vs	mAa	mAs	Pdiss	freq	f.max	Pout
	12.6	0.9	750	300	115	8.0	25W	100MHz	500MHz	103W

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 02 December 2007 {find valves by name}