783-A: Difference between revisions
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{{GR Product | |||
The | |model=783-A | ||
|codes=ABBEY | |||
|class=meters | |||
|summary=Output-power meter | |||
|image=GR 783-A Front.jpg | |||
|caption=General Radio 783-A Output-Power Meter | |||
|series= | |||
|introduced=1944 | |||
|discontinued=1961 | |||
|designers= | |||
|manuals= | |||
* [[Media:GR 783A Output-Power Meter 548 1960.pdf|General Radio 783-A Output-Power Meter Manual 548F (1967)]] | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio 783-A}} is an Output-Power Meter introduced in {{Catalog K2}} that remained available through {{Catalog Q}}. | |||
The 783-A is acts as an adjustable load impedance, with a voltmeter calibrated directly in watts dissipated in the load. | |||
It can safely handle 100 W at audio frequencies. | |||
It can be used to test amplifiers, transformers, oscillators, filters, and similar networks. | |||
{{Asbestos}} | |||
==Specifications== | |||
* '''Power Range:''' 0.2 mW to 100 W in five ranges | |||
* '''Impedance Range:''' 2.5 to 20,000 Ω | |||
* '''Power Accuracy:''' ±0.25 dB at full-scale reading. Overall frequency characteristic of power indication is flat within ±0.5 dB from 20 to 10,000 Hz; within 0.75 dB to 15,000 Hz | |||
==Links== | ==Links== | ||
* [[Media:GR Exp 783-A 02_1942.pdf|Experimenter describing 783-A | * [[Media:GR Exp 783-A 02_1942.pdf|Experimenter February 1942 describing 783-A]] (OCRed) | ||
==Photos== | ==Photos== | ||
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GR 783-A Rear Inside.jpg | GR 783-A Rear Inside.jpg | ||
GR 783-A Right Side.jpg | GR 783-A Right Side.jpg | ||
GR 783-A Load Resistors.jpg | GR 783-A Load Resistors.jpg| '''Asbestos Insulator''' | ||
GR 783-A Rear.jpg | GR 783-A Rear.jpg | ||
GR 783-A Case.jpg | GR 783-A Case.jpg | ||
Latest revision as of 10:00, 30 June 2024
The General Radio 783-A is an Output-Power Meter introduced in Catalog K2 (1942) that remained available through Catalog Q (1961).
The 783-A is acts as an adjustable load impedance, with a voltmeter calibrated directly in watts dissipated in the load. It can safely handle 100 W at audio frequencies.
It can be used to test amplifiers, transformers, oscillators, filters, and similar networks.
- CAUTION: This device contains asbestos.
Specifications
- Power Range: 0.2 mW to 100 W in five ranges
- Impedance Range: 2.5 to 20,000 Ω
- Power Accuracy: ±0.25 dB at full-scale reading. Overall frequency characteristic of power indication is flat within ±0.5 dB from 20 to 10,000 Hz; within 0.75 dB to 15,000 Hz
Links
Photos
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Asbestos Insulator
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