The ME1403 is a subminiature electrometer pentode. Mullard describe the the ME1403 as having a grid current of 3 x 10 to the power -15A.

To avoid drift the filament must be heated before anode volts are applied.

Such electrometer pentodes would be used for pH meters and other critical measuring devices.

The connections are taken clockwise from the red spot when looking at the underside of the base. Pin 5 is at the centre.

Seen from the side the wire grids become clearly visible, with the anode showing as two strips at the top and bottom of the picture.

See also CV2348

The thin glass tube envelope is 10 mm in diameter and, excluding the flying leads is 43 mm long.

 
Pin Connections

	1	2	3	4	5
	f+,g3	g1	f-	a	g2

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	mAa	gm
	1.25	0.0082	45	45	0.18,ra_10.5M	8-15

This exhibit was last updated on 07 January 2007