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This is a forced-air cooled tetrode designed for use as an amplifier in VHF TV and FM equipment. It has a high transconductance essential for high gain and very efficient operation and assures long life and highly reliable operation. |
Technical specification
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Model: 8F76R |
General Characteristics(for more details, please download or ask for) | ||||||||
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Frequency for Max. Rating |
250 MHz |
Transconductance(Ia=2.5A) |
60 mA/V |
Filament Voltage |
7.5 V | ||||
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Anode Voltage(Max.) |
8 Kv |
Internal Amp. Factor |
8.75 |
Filament Current |
120 A | ||||
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Anode Current(Max.) |
5.5 A |
Cathode |
Thoriated-Tungsten |
Length |
257 mm | ||||
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Control Grid Voltage(Max.) |
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Heating |
Direct |
Diameter |
188 mm | ||||
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Screen-Grid Voltage(Max.) |
1.5 kV |
Interelectrode Capacitance |
Weight |
9.4 kg | |||||
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Anode Dissipation(Max.) |
15 kW |
Cathode-Control Grid |
56 pF |
Anode Cooling |
Forced Air | ||||
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Control-Grid Dissipation(Max.) |
180 W |
Control Grid-Screen Grid |
91 pF |
Operation Position |
Vertical, Anode up | ||||
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Screen-Grid Dissipation(Max.) |
300 W |
Control Grid-Anode |
0.6 pF | ||||||
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Typical Operation | |||||||||
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Type of Service |
F.(Hz) |
Peak-of-Sync Pout |
Bandwidth(-1dB) |
Ua |
Ug1 |
Ug2 |
Ig1 |
Ia (with signal) |
Ig2 |
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Vission carrier Amplification |
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13.4 kW |
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6.2 kV |
-120 V |
880 V |
46 mA |
3.5 A |
27 mA |