The EBF83 is normal looking exhibit that disguises a very unusual low voltage double diode pentode valve. The 12.6 Volt anode rating, coupled with a standard 6.3 V 0.3A heater, indicates operation from a vehicle battery and the car radio is the obvious application. This is confirmed by Mullard who describe this valve as being designed for use in hybrid car radio applications.

See also ECC86, ECH83 and EF98.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 59 mm tall.

 
Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	g2	g1	k,s	h	h	a	ad(1)	ad(2)	g3

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	mAa	mAs	ra	gm
	6.3	0.3	12.6	12.6	0.45	0.14	1M	1

Thanks to Frank Philipse for supplying the above datasheet

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