1140-A: Difference between revisions
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{{GR Product | {{GR Product | ||
|model=1140-A | |model=1140-A | ||
|codes=WAGER | |||
|class=frequency standards and meters | |class=frequency standards and meters | ||
|summary=UHF Wavemeter | |summary=UHF Wavemeter | ||
| Line 11: | Line 12: | ||
|manuals= | |manuals= | ||
"Manual Needed" | "Manual Needed" | ||
{{Catalog History}} | |||
}} | }} | ||
The | 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 | |||
called a | 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 | * '''Frequency Range:''' 240-1200 MHz in one range | ||
* '''Accuracy:''' ±2% of the indicated frequency | * '''Accuracy:''' ±2% of the indicated frequency | ||
* '''Detector:''' A type 1N22 Crystal Detector (Microwave Diode) | * '''Detector:''' A type 1N22 Crystal Detector (Microwave Diode) | ||
==Links== | ==Links== | ||
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)
