CV451 electrometer triode
 |
This valve measures 47x10mm overall and has a 3 lead base. |
| Filament voltage | 1.25V |
| Filament current | 25mA |
| Max anode voltage | 9V |
| Mutual conductance * | 70µA/V |
| Amplification factor * | 1.0 |
| Min grid-cathode resistance ** | 1014 Ohms |
| Capacitances | |
| Cg - all | 1.7pF |
| Cga | 0.2pF |
*: At Va=6, Vg=-2.
**: At Va=6, Vg=-3.5
Connections: Anode is the centre lead in the base, and grid the lead at the other end. Filament +ve is the lead not in line with the grid lead, filament -ve and the internal shield is the other lead.
The valve is designed to be operated in darkness in a dry container made of metal to serve as an electrostatic shield.
Paper work with the valve:
Valve type RT3
Important notice
Don't touch the glasswork
The bulb of this valve is specially treated, and must in no circumstances be touched by hand.
When required for use, a quarter of an inch of paper should be carefully torn from each end of the paper envelope, exposing the tinned leads.
Which the calce [sic.] still in its envelope these leads should be soldered to the appropriate points in the circuit, using only "Ersin" of resin-cored solder. No other form of flux must be employed.
When the leads have been soldered in position the remaining portion of the paper envelope should be carefully cut away taking great care not to finger the glass bulb.
Note - Please keep this leaflet for future reference, and when re-ordering ask for Osram valve Type "ET3".
Ref. e.1959 - VX.3094.
