| STC CV485 Heil
tube
 |
The valve measures 85x19mm
overall (42mm across the disk) |
The CV485 is a specially selected
CV228.
| Heater voltage |
6.3V |
| Nominal heater current |
0.3A |
| Grid voltage Vg1 |
-10V |
| Resonator voltage Vres |
220V |
| Screen voltage Vg2 |
0 to Vres |
| Anode voltage Va |
Vres + 10 to Vres + 20 |
| Power output |
0.25W min |
| Cathode current |
40mA max |
| Tuning range |
4580 to 4860MHz min |
| Magnetic field |
1100 gauss min |
Vg2 is adjusted to give the
specified cathode current. Operation with Va=Vres may give increased noise
output. Jessops magnet type no. 10512 or 9501 is suitable.
 |
| Pin |
Function |
| 1 |
Grid |
| 2 |
Cathode |
| 3 |
Heater |
| 4 |
Heater |
| 5 |
Anode |
| 6 |
Resonator |
| 7 |
Screen grid |
|
The copper disk connects internally
to pin 6 |
Above: V246A/2K / CV485; below: V246A/1K / CV485
 |
