Cooling of the 304TL is accomplished by radiation from the plate, which operates at a visible red color at maximum dissipation, and by means of air convection around the envelope.
| GENERAL DESCRIPTION |
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The 304TL is a low-mu power triode having a maximum plate dissipation rating of 300 watts, and is intended for use as an amplifier, oscillator or modulator, where maximum performance can be obtained at low plate voltage. It can be used at its maximum ratings at frequencies as high as 40 MHz. Cooling of the 304TL is accomplished by radiation from the plate, which operates at a visible red color at maximum dissipation, and by means of air convection around the envelope. |
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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) | 12 |
| Direct Interelectrode Capacitances (Average) Grid-Plate Grid-Filament Plate-Filament |
8.6 pF 12.1 pF .8 pF |
| Transconductance (Ib=1.0 amp, Eb=3000 V, ec=-175 V) | 16,700 μmhos |
| Frequency for Maximum Ratings | 40 MHz |
| MECHANICAL | |
| Base | Special 4 pin, No. 5000B |
| Socket | Johnson No. 124-213 or Equivalent |
| Mounting | Vertical, base down or up |
| Cooling | Convection and Radiation |
| Recommended Heat Dissipating Connectors: Plate Grid |
HR-7 HR-6 |
| Maximum Overall Dimensions: Length Diameter |
7.625 inches 3.563 inches |
| Net Weight | 9 ounces |
| Shipping Weight (Average) | 2 pounds |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Continental Electronics | 417 B | 50 |
| 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 |