The VP13A is a variable μ amplifier pentode from the mid 1930s, and features the short lived Ct8 side contact base.

In use the variable μ pentode was designed for AGC controlled stages of superhet receivers, the RF and IF sections. The control grid is taken to the top cap for maximum isolation between grid and anode circuits.

The classic envelope is 40 mm in diameter, and excluding the Ct8 base pins, is 104 mm tall.

 
Pin Connections

Ct8	1	2	3	4	5	6	7	8	tc
	m	h	h	k	g5	-	g2	a	g1

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	13.0	0.2	200	100	-2	4.0	1.4	1M	2.2

This exhibit was last updated on 21 July 2005