The 4CX3500A has a gain of over 18 dB in FM broadcast service, and is also recommended for rf linear power amplifier service and for VHF-TV linear amplifier service. The anode is rated for 3500 watts of dissipation with forced-air cooling.
| GENERAL DESCRIPTION |
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The 4CX3500A is a compact ceramic/metal radial beam power tetrode intended for use in VHF power amplifier applications. It features a type of internal mechanical structure which results in high rf operating efficiency. Low rf losses in this structure permit operation at full ratings to 220 MHz. The 4CX3500A has a gain of over 18 dB in FM broadcast service, and is also recommended for rf linear power amplifier service and for VHF-TV linear amplifier service. The anode is rated for 3500 watts of dissipation with forced-air cooling. |
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| TECHNICAL SPECIFICATIONS | |
| Plate Dissipation (Max.) | 3500 watts |
| Screen Dissipation (Max.) | 165 watts |
| Grid Dissipation (Max.) | 50 watts |
| Frequency for Max. Ratings (CW) | 220 MHz |
| Cooling | Forced Air |
| Filament Voltage Current |
Thoriated Tungsten Mesh 5.0 volts 90 amperes |
| Capacitances (Grounded Cath. Connection) Input Output Feed-through |
111.0 pF 12.0 pF 0.5 pF |
| Capacitances (Grounded Grid Connection) Input Output Feed-through |
58.5 pF 10.0 pF 0.4 pF |
| Amplification Factor (g1-g2) | 4.5 |
| Base | Special Coaxial |
| Recommended Air-System Socket | SK-340 Family |
| Recommended Air Chimney | SK-346 |
| Maximum Seal & Anode Core Temperature | 250°C |
| Maximum Length | 7.25 in; 184.15 mm |
| Maximum Diameter | 4.94 in; 125.48 mm |
| Weight (approximate) | 5.5 lb; 2.5 kg |
| Operating Position | Vertical base up or down |
| Specifications may change without notice | |
| THIS TUBE IS USED IN THE FOLLOWING SHORTWAVE BROADCAST TRANSMITTERS | ||
| Manufacturer | Transmitter specifications | Power in kW |
| HCJB Global | HC 100 | 100 |
| 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 |