358: Difference between revisions
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|class=frequency standards and meters | |class=frequency standards and meters | ||
|summary= | |summary=Wavemeter | ||
|image=GR 358 Case Open B.jpg | |image=GR 358 Case Open B.jpg | ||
|caption=General Radio 358 Amateur Band Wavemeter | |caption=General Radio 358 Amateur Band Wavemeter | ||
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GR 358 Wavemeter Inside.jpg | GR 358 Wavemeter Inside.jpg | ||
GR 358 Calibration Chart.png | GR 358 Calibration Chart.png | ||
GR Condenser Brace Top.jpg | |||
GR Condenser Brace Bottom.jpg | |||
GR Condenser Brace Side.jpg | |||
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[[Category:Frequency Standards and Meters]] | [[Category:Frequency Standards and Meters]] | ||
Latest revision as of 00:54, 3 October 2024
The General Radio 358 Amateur Band Wavemeter was introduced in Bulletin 926 (1924) and remained available through Catalog K1 (1939).
The Type 358 is an absorption-type wavemeter covering the four overlapping bands. It has a frequency accuracy of 1% and uses an incandescent lamp as a resonance indicator. The lamp is in a special socket that closes the connection when the lamp is removed if not needed.
Each wavemeter is supplied with a calibration chart produced with settings accurate for that particular meter.
A Type 247 gear-driven condenser is used inside the meter.
Specifications
- Frequency Ranges
- Wavelength: 14 to 28 Meters, 26 to 56 Meters, 54 to 114 Meters, 105 to 220 Meters
- Frequency: 10.0 to 20.0 MHz, 5.0 to 10.0 Mhz, 2.5 to 5.0 MHz, 1.5 to 3.0 MHz
- Accuracy: 1%
Links
- Experimenter describing Type 358 February 1926
- Experimenter describing the calibration of Type 358 July 1927
