| GENERAL DESCRIPTION |
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The 3CX2500F3 is a medium-mu, all ceramic-and-metal, forced-air cooled, external anode power triode with a maximum plate dissipation rating of 4000 watts. High power output as an amplifier, oscillator, or modulator may be obtained at moderate voltages. The tube has a rugged, low-inductance cylindrical filament-stem structure, which readily becomes a part of a linear filament tank circuit for VHF operation. The grid provides good shielding between the input and output circuits for grounded-grid appliciations and is conveniently terminated in a ring between the plate and filament terminals. The 3CX2500F3 has flexible leads on the base for grid and filament connections which can simplify socketing in low frequency applications. |
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| TECHNICAL SPECIFICATIONS | |
| ELECTRICAL | |
| Filament Voltage Current @ 7.5 V |
Thoriated Tungsten filament 7.5 ±0.37 V 51.5 A |
| Amplification Factor (average) | 22 |
| Direct Interelectrode Capacitance Cin Cout Cgp |
(grounded filament) 35 pF 0.9 pF 20 pF |
| Frequency for Maximum Rating | 75 MHz |
| MECHANICAL | |
| Maximum Overall Dimensions Length (incl. fil. leads) Diameter |
18.437 In; 46.83 cm 4.156 In; 10.56 cm |
| Operating Position | Vertical, base up or down |
| Net Weight (Approx) | 7.0 lb; 3.2 kg |
| Cooling | Forced Air |
| Base | Special with Flying Leads |
| Maximum Operating Temperature Anode Core & Ceramic/Metal Seals Filament Lead/Tube Base Junctions |
250°C 150°C |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Gates | HF-5 / HF-5 B | 5 |
| HF-10 / HF-10 B | 10 | |
| BHF-10 | 10 | |
| HF-20 / HF-20 B | 20 | |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| Eimac | Econco | Richardson Electronics |
| Penta Laboratories | ||
| 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 |