| STC CV2221 / V235A/1K Heil
tube
 |
This measures 65x19mm
(42mm across the copper disk) and has a B7G base. |
| Heater voltage |
6.3V |
| Heater current |
0.3A |
| Nominal tuning range |
7.5 to 11.5cm |
| Max dissipation anode
plus resonator |
15W |
| Anode voltage |
150 to 420V |
| Resonator voltage |
140 to 400V |
| Max screen voltage |
400V |
| Max resonator dissipation |
8W |
| Max cathode current |
65mA |
| Max screen dissipation |
1.5W |
The anode should be 20V positive
to the resonator when low noise output is required. The screen voltage
must not exceed the resonator voltage by more than 50V. A permanent magnet
of 1000 oersteds is required to focus the beam - 'Jessop' type 9501 and
10512 is recommended.
| Pin |
Function |
| 1 |
Grid 1 |
| 2 |
Cathode |
| 3 |
Heater |
| 4 |
Heater |
| 5 |
Anode |
| 6 |
Resonator |
| 7 |
Grid 2 |
|
