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804-B: Difference between revisions
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(Created page with "Type '''804-B UHF Signal Generator'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Generators") |
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{{GR Product | |||
|model=804-B | |||
|codes=DENSE | |||
|class=generators | |||
|summary=UHF Signal Generator | |||
|image=GR 804-C Close-Up.jpg | |||
|caption=General Radio 804-B UHF Signal Generator | |||
|series=804 | |||
|introduced=1942 | |||
|discontinued=1942 | |||
|designers= | |||
|manuals= | |||
* [[Media:GR 804-B UHF Signal Generator 536-C.pdf|General Radio 804-B UHF Signal Generator Manual 536-C]] | |||
{{Catalog History}} | |||
}} | |||
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, 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. 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 Type 774 coaxial connector for carrier output. | |||
Note: The undocumented Type 804-C pictures are used for this article. | |||
==Specifications== | ==Specifications== | ||
* '''Frequency Range:''' 7.5 to 330 MHz in 5 ranges and a sixth user defined range | |||
* '''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 Impedance:''' 75 Ω | |||
* '''Modulation:''' AM internal 400 Hz, 0 to 60%; AM external 100-20,000 Hz, seven volts are required for 50% modulation | |||
==Links== | ==Links== | ||
* [[Media:GR Exp 804-A 11_1939.pdf|Experimenter November 1939 describing Type 804-A]] | |||
* [[Media:GR Exp 804-B 02_1941.pdf|Experimenter February 1941 describing Type 804-B]] | |||
* [[Media:RCA 955 Acorn Triode 06_1944.pdf|RCA 955 Acorn Triode Data Sheet]] | |||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 804-C Front A.jpg | |||
GR 804-C Front.jpg | |||
GR 804-C Inside Front.jpg | |||
GR 804-C Case Left Side.jpg | |||
GR 804-C Case Rear.jpg | |||
GR 804-C Case Right Side.jpg | |||
GR 804-C Inside Left A.jpg | |||
GR 804-C Inside Left.jpg | |||
GR 804-C Inside Rear A.jpg | |||
GR 804-C Inside Rear.jpg | |||
GR 804-C Inside Rear Upper Middle.jpg | |||
GR 804-C Rear Lower Center.jpg | |||
GR 804-C Rear Lower Right.jpg | |||
GR 804-C Inside Bottom Left.jpg | |||
GR 804-C Inside Bottom.jpg | |||
GR 804-C Inside Bottom Right.jpg | |||
GR 804-C Case Inside.jpg | |||
GR 804-C Case Inside Close-up.jpg|Oscillator Coil Storage | |||
</gallery> | </gallery> | ||
[[Category:Generators]] | [[Category:Generators]] | ||