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{{GR Product | |||
|model=358 | |||
|codes=UPPER | |||
|class=frequency standards and meters | |||
|summary=Wavemeter | |||
|image=GR 358 Case Open B.jpg | |||
|caption=General Radio 358 Amateur Band Wavemeter | |||
|series= | |||
|introduced=1924 | |||
|discontinued=1939 | |||
|designers= | |||
|manuals= | |||
* '''Manual Needed''' | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio 358 Amateur Band Wavemeter}} was introduced in {{Bulletin 926}} and remained available through {{Catalog K1}}. | |||
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 [[247|Type 247]] gear-driven condenser is used inside the meter. | |||
==Specifications== | ==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== | ==Links== | ||
* [[Media:GR Exp 358 02_1926.pdf|Experimenter describing Type 358 February 1926]] | |||
* [[Media:GR Exp 358 07_1927.pdf|Experimenter describing the calibration of Type 358 July 1927]] | |||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 358 Case.jpg | |||
GR 358 Case Open A.jpg | |||
GR 358 Case Open.jpg | |||
GR 358 Coil Set A.jpg | |||
GR 358 Coil Set.jpg | |||
GR 358 Wavemeter.jpg | |||
GR 358 Wavemeter Outside.jpg | |||
GR 358 Meter Open.jpg | |||
GR 358 Wavemeter Inside.jpg | |||
GR 358 Calibration Chart.png | |||
GR Condenser Brace Top.jpg | |||
GR Condenser Brace Bottom.jpg | |||
GR Condenser Brace Side.jpg | |||
</gallery> | </gallery> | ||
[[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
