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804-B: Difference between revisions
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The {{Title|General Radio 804-B UHF Signal Generator}} was available in {{Catalog K2}} only. | The {{Title|General Radio 804-B UHF Signal Generator}} was available in {{Catalog K2}} only. | ||
The Type 804-B is a UHF signal generator designed for radio receiver servicing. It covers 7.5 to 330 MHz in five ranges and a user defined sixth range | The Type 804-B is a UHF signal generator designed for radio receiver servicing. It covers 7.5 to 330 MHz in five ranges, and a user defined sixth range for which a blank coil form is supplied with the instrument. | ||
With the use of the carrier level meter and attenuator, calibrated levels from 0 to 20 μV are achieved. | |||
A front-panel switch selects AM modulation of 400 Hz, external modulation or modulation disabled. | |||
Caution should be used as there is incidental FM present, particularly at higher frequencies. | |||
The vacuum tube used for the oscillator is an RCA "Acorn" type 955 triode. | |||
The 804-B uses the [[774|Type 774 coaxial connector]] for carrier output. | |||
Note: The undocumented Type 804-C pictures are used for this article. A schematic for the 804-C is located at the rear of the 804-B manual. | Note: The undocumented Type 804-C pictures are used for this article. A schematic for the 804-C is located at the rear of the 804-B manual. | ||
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==Specifications== | ==Specifications== | ||
* '''Frequency Range:''' 7.5 to 330 MHz in 5 ranges | * '''Frequency Range:''' 7.5 to 330 MHz in 5 ranges, plus a sixth user defined range | ||
* '''Frequency Calibration:''' direct reading within 2% | * '''Frequency Calibration:''' direct reading within 2% | ||
* '''Output Voltage Range:''' 1 to 20 μV for 7.5-100 MHz; 1 to 10 μV for 100-330 MHz | * '''Output Voltage Range:''' 1 to 20 μV for 7.5-100 MHz; 1 to 10 μV for 100-330 MHz | ||