| GENERAL DESCRIPTION |
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The 3CX2500A3 / 8161 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. |
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| TECHNICAL SPECIFICATIONS | |
| ELECTRICAL | |
| Filament Voltage Current @ 7.5 V |
Thoriated Tungsten 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 | 110 MHz |
| MECHANICAL | |
| Maximum Overall Dimensions Length Diameter |
9.000 In; 22.76 cm 4.156 In; 10.56 cm |
| Operating Position | Vertical, base up or down |
| Net Weight (Approx) | 6.2 lb; 2.8 kg |
| Cooling | Forced Air |
| Base | Special Coaxial |
| Maximum Operating Temperature Anode Core & Ceramic/Metal Seals |
250°C |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| Collins | 207A-1 | 10 |
| AN/FRT-5 | 15 | |
| AN/FRT-26 | 15 | |
| 207B-1 | 35 | |
| AN/FRT-6 | 40 | |
| AN/FRT-22 | 40 | |
| THIS TUBE IS AVAILABLE FROM | ||
| Manufacturer | Rebuilder | Distributor |
| Eimac | Econco | Richardson Electronics |
| Penta Laboratories | Kennetron | |
| 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 |