The E283CC is a special quality audio double triode. It is a development of the ECC83 but with a different pin layout. The amplification factor (mu) is, like the ECC83, 100. The data sheet makes it clear that for maximum life the heater voltage should remain within 5% of the 6.3 nominal value.

The transposition of the letters and numbers was the Mullard way of designating a special quality product.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 46 mm tall.

 
Pin Connections

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

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	gm
	6.3	0.3	250	-1	1.25	1.6

Thanks to Frank Philipse for supplying the above datasheet

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