Cooling of the 450TH is accomplished by radiation from the plate, which operates at a visible red color at maximum dissipation, and by means of air circulation around the envelope.
| GENERAL DESCRIPTION |
|
The 450TH is a high-mu power triode having a maximum plate dissipation rating of 450 watts, and is intended for use as an amplifier, oscillator and modulator. It can be used at its maximum ratings at frequencies as high as 40 Mc. Cooling of the 450TH is accomplished by radiation from the plate, which operates at a visible red color at maximum dissipation, and by means of air circulation around the envelope. |
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| TECHNICAL SPECIFICATIONS | |
| ELECTRICAL | |
| Filament Voltage Current |
Thoriated tungsten 7.5 volts 12.0 amperes |
| Amplification Factor (Average) | 38 |
| Direct Interelectrode Capacitances (Average) Grid-Plate Grid-Filament Plate-Filament |
5.0 μμfd. 8.8 μμfd. 0.8 μμfd. |
| Transconductance (Ib=500 ma., Eb=4000 v.) | 6650 μmhos |
| Frequency for maximum ratings | 40 Mc. |
| MECHANICAL | |
| Base | Special 4 pin, No. 5002B |
| Basing | RMA type 4AQ |
| Mounting | Vertical, base down or up |
| Cooling | Radiation and air circulation |
| Socket | Johnson Type No. 211 or National Type No. XM50 or equivalent |
| Recommended Heat Dissipating Connectors: Plate Grid |
HR-8 HR-8 |
| Maximum Overall Dimensions: Length Diameter |
12.625 inches 5.125 inches |
| Net weight | 1.3 pounds |
| Shipping weight (Average) | 5.6 pounds |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Gates Radio | HF1 | 1 |
| 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 |