The 30C18 is a purpose designed oscillator and mixer for frequency changer use in UHF television receivers. Although there are two separate electrode systems in the envelope the cathodes are joined together. To lower cathode lead inductance two pins are used for the cathode connections.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 45 mm tall.

 
Pin Connections

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

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	7.4	0.3	155	135	-3.0	7.8	2.4	0.4M	4.7

Triode	Va	mAa
	77	7.8

This exhibit was last updated on 04 July 2009