Quantity in Stock
11
Location
Box E.1
The EC90 triode was specified as both an amplifier and an RF power valve.
In the latter role it would deliver 5.5 Watts with a very small envelope volume, this would make it ideal for hand portable equipment.
In larger apparatus it could deliver enough drive power for much larger PA’s.
The thin glass tube envelope is 18 mm in diameter and has an overall length, excluding the B7G base pins, of 45 mm.
Pin 1: Anode
Pin 2: No Connection
Pin 3: Heater
Pin 4: Heater
Pin 5: Anode
Pin 6: Grid
Pin 7: Cathode
Specifications
Vf : 6.3v
If : 150mA
Va : 250v
Vg1 : -8.5v
Ia : 10.5mA
Ra : 7.7kΩ
Cgk : 1.8pF
Cak : 1.3pF
Cga : 1.6pF
Substitutes
CV133
CV852
L77
V741
Datasheets
Thanks to the Valve Museum for the information collected here.