1140-A: Difference between revisions
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(Created page with "Type '''1140-A UHF Wavemeter'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Frequency Standards and Meters") |
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{{GR Product | |||
|model=1140-A | |||
|codes=WAGER | |||
|class=frequency standards and meters | |||
|summary=UHF Wavemeter | |||
|image=GR 1140-A Front.jpg | |||
|caption=General Radio 1140-A UHF Wavemeter | |||
|series= | |||
|introduced=1948 | |||
|discontinued=1954 | |||
|designers= | |||
|manuals= | |||
"Manual Needed" | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio 1140-A UHF Wavemeter}} was introduced in {{Catalog L}} and remained available through {{Catalog N}}. | |||
The 1140-A is a simple device to measure frequency in the UHF range of 240 to 1200 MHz with 2% accuracy. Behind the rear window is what is called a [[butterfly circuit]] which varies capacitance and inductance simultaneously to attain resonance. Resonance is indicated with a microammeter. | |||
==Specifications== | ==Specifications== | ||
* '''Frequency Range:''' 240-1200 MHz in one range | |||
* '''Accuracy:''' ±2% of the indicated frequency | |||
* '''Detector:''' A type 1N22 Crystal Detector (Microwave Diode) | |||
==Links== | ==Links== | ||
* [[Media:GRwiki Exp 1140-A 10_1945.pdf|Experimenter describing Type 1140-A October 1945]] | |||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 1140-A Front.jpg | |||
GR 1140-A Inside Front.jpg | |||
GR 1140-A Inside Left.jpg | |||
GR 1140-A Inside Rear Butterfly B.jpg | |||
GR 1140-A Inside Rear Butterfly.jpg | |||
GR 1140-A Inside Rear.jpg | |||
GR 1140-A Inside Right.jpg | |||
GR 1140-A Bottom.jpg | |||
</gallery> | </gallery> | ||
[[Category:Frequency Standards and Meters]] | [[Category:Frequency Standards and Meters]] | ||
Latest revision as of 20:07, 28 May 2024
The General Radio 1140-A UHF Wavemeter was introduced in Catalog L (1948) and remained available through Catalog N (1954).
The 1140-A is a simple device to measure frequency in the UHF range of 240 to 1200 MHz with 2% accuracy. Behind the rear window is what is called a butterfly circuit which varies capacitance and inductance simultaneously to attain resonance. Resonance is indicated with a microammeter.
Specifications
- Frequency Range: 240-1200 MHz in one range
- Accuracy: ±2% of the indicated frequency
- Detector: A type 1N22 Crystal Detector (Microwave Diode)
