| GENERAL DESCRIPTION |
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The 304TH is a medium-mu power triode intended for use as an amplifier, oscillator or modulator. It has a maximum plate-dissipation rating of 300 watts and a maximum plate-voltage rating of 3000 volts at frequencies up to 40 MHz. The 304TH in Class-C rf service will deliver up to 1200 watts plate power output with 53 watts driving power. Two 304TH's in Class-AB2 modulator service will deliver up to 1400 watts maximum-signal plate power output with 14 watts nominal driving power. |
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| TECHNICAL SPECIFICATIONS | |
| ELECTRICAL | |
| Filament Voltage Current |
Thoriated Tungsten 5.0 or 10.0 volts 25.0 or 12.5 amperes |
| Amplification Factor (Average) | 20 |
| Direct Interelectrode Capacitances (Average) Grid-Plate Grid-Filament Plate-Filament |
10.2 pF 13.5 pF 0.7 pF |
| Transconductance (Ib=1.0 amp., Eb=3000 v.) | 16,700 μmhos |
| Highest Frequency for Maximum Ratings | 40 MHz |
| MECHANICAL | |
| Base | Special 4-pin |
| Socket | Johnson type No. 124-213 or equivalent |
| Mounting Position | Vertical, base down or up |
| Cooling | Convection and radiation |
| Maximum Temperature of Plate and Grid Seals | 225°C |
| Recommended Heat-Dissipating Connectors: Plate Grid |
HR-7 HR-6 |
| Maximum Over-all Dimensions: Length Diameter |
7.63 inches 3.56 inches |
| Net Weight | 9 ounces |
| Shipping Weight | 3.0 pounds |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Gates Radio | HF-100 | 100 |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| PRICE LEVEL (US$) | |||||
| 1 | 2 | 3 | 4 | 5 | 6 |
| 0 - 10 | 10 - 100 | 100 - 1000 | 1000 - 10,000 | 10,000 - 50,000 | 50,000 - 100,000 |