The CV2136 is the Common Valve, as identified by the UK Government, equivalent of the 6BW6. The valve is essentially the once-ubiquitous Octal type 6V6G squeezed into a B9A envelope. The nominal ratings of the two types are identical. Not surprisingly, 6BW6s usually run (very) hot and require good ventilation if they are not to 'die' prematurely.

Since the whole idea of making B9A versions of standard Octal radio valves was to enable sets to be made smaller, overheating was common.

The 6BW6/CV2136 was most common in radio transmitters for the audio power stages of the amplitude modulator. In the latter application, with 315 Volts on the anodes, a pair would produce 30 Watts in class AB1.

The 6BW6/CV2136 can also generate RF power at a few tens of megahertz.

In the 1960s this valve was still current production for its manufacturers Brimar.

Special quality versions of the 6BW6 were developed. See CV4043 and CV4045.

The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins measures 58 mm in length.

 
Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	ic	g1	k	h	h	nc	a	g2	g3

 
Absolute Maximum Operating Conditions

Beam Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	6.3	0.45	315	225	-13	34	2.2	77k	3.75	5.5	12%

This exhibit was last updated on 21 August 2005