7320
7320 has no equivalent designation confirmed by the archive.
Description
The 7320 is a power pentode with characteristics similar to the EL84/6BQ5. It has an indirectly heated cathode and a noval (9-pin) base.
Construction and Ratings
The 7320 was designed to withstand shocks and vibrations encountered in mobile equipment, particularly in aeronautics or industrial electronic devices. Its filament can withstand a minimum of 5,000 successive on/off cycles. The filament requires 6.3 V at 760 mA, with a permissible filament voltage range of 5.7 V to 6.9 V. The maximum bulb temperature is 225 °C, and the maximum altitude without pressurization is 18 km.
Maximum ratings include an anode voltage of 400 V, a screen grid (grid 2) voltage of 400 V, an anode dissipation of 12 W, a screen grid dissipation of 2 W, a cathode current of 75 mA, a negative grid 1 voltage of 100 V, and a grid 1 dissipation of 0.5 W. The maximum grid 1 circuit resistance is 1.1 MΩ with automatic bias and 0.3 MΩ with fixed bias. The maximum voltage between filament and cathode is 100 V.
Capacitance
The grid 1 to anode capacitance is 0.5 pF, the input capacitance is 9.6 pF, and the output capacitance is 6 pF.
Original manufacturer datasheets for 7320, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| Mazda-Belvu | 7320 | PDF (752 KB) |
Documents held here and used to write this page.
- AMPLIFICATEUR CLASSE A EN MONTAGE TRIODE (grille nº 2 reliée à l'anode)
1 further designation appears alongside 7320 in the literature but below the evidence threshold used here, so it is not listed as equivalent.