The UF89 is an internally screened variable μ pentode designed for VHF applications in Band I and Band III televisions. It is a low impedance device and may have found application in receiver front ends.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A pins is 52 mm tall.

References: Datasheet & ¹⁰⁴⁰. Type UF89 was first introduced^¶ in 1955.

 
Pin Connections

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

 
Absolute Maximum Operating Conditions^¶

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	12.6	0.1	170	110	-2	12	3.9	0.525k	3.8

Thanks to Frank Philipse for supplying the above PDF datasheet