1234: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 2: | Line 2: | ||
|model=1234 | |model=1234 | ||
|class=detectors amplifiers | |class=detectors amplifiers | ||
|summary= | |summary=Standing-wave meter | ||
|image=GR 1234 Front Close-up.jpg | |image=GR 1234 Front Close-up.jpg | ||
|caption=General Radio 1234 Standing-Wave Meter | |caption=General Radio 1234 Standing-Wave Meter | ||
| Line 15: | Line 15: | ||
The {{Title|General Radio 1234 Standing-Wave Meter}} was introduced in {{Catalog T}} and remained available through {{Catalog 1978}}. | The {{Title|General Radio 1234 Standing-Wave Meter}} was introduced in {{Catalog T}} and remained available through {{Catalog 1978}}. | ||
It is a low-noise, three-stage tuned amplifier operating at 1 kHz, designed to measure standing waves (maxima and minima) | |||
when paired with a slotted line like the [[874-LB]] and either a crystal rectifier or a bolometer used as a detector. | |||
The panel meter is equipped with lamps at the far end of each scale to indicate which detector is in use. | |||
There are also AC and DC outputs for use with a recorder. | |||
==Specifications== | ==Specifications== | ||
* '''Meter Scales VSWR:''' 1 to 4, 3.2 to 10, 1 to 1.2, and 1 to 1.05;dB, 0 to 10, 0 to 1.6, and 0 to 0.45 | * '''Meter Scales VSWR:''' 1 to 4, 3.2 to 10, 1 to 1.2, and 1 to 1.05;dB, 0 to 10, 0 to 1.6, and 0 to 0.45 | ||
* '''Meter Scale Bolometer:''' current, 0 to 10 mA | * '''Meter Scale Bolometer:''' current, 0 to 10 mA | ||
* '''Meter Accuracy:''' 0 to 10 dB scale, ±(0.01 dB + 2% of reading);0 to 1.6 dB scale, ±0.02 dB; 0 to 0.45 dB scale, ±0.007 dB | * '''Meter Accuracy:''' 0 to 10 dB scale, ±(0.01 dB + 2% of reading);0 to 1.6 dB scale, ±0.02 dB; 0 to 0.45 dB scale, ±0.007 dB | ||
* '''Bandwidth:''' 10 to 100 Hz, adjustable with constant gain | * '''Bandwidth:''' 10 to 100 Hz, adjustable with constant gain | ||
* '''Frequency:''' 1 kHz, adjustable ±30 Hz | * '''Frequency:''' 1 kHz, adjustable ±30 Hz | ||
==Links== | ==Links== | ||
* [[Media:GR Exp 1234 SWR 02_1968.pdf|Experimenter describing Type 1234 | * [[Media:GR Exp 1234 SWR 02_1968.pdf|Experimenter February 1968 describing Type 1234]] | ||
==Photos== | ==Photos== | ||
Revision as of 19:00, 16 April 2024
The General Radio 1234 Standing-Wave Meter was introduced in Catalog T (1968) and remained available through Catalog 1978.
It is a low-noise, three-stage tuned amplifier operating at 1 kHz, designed to measure standing waves (maxima and minima) when paired with a slotted line like the 874-LB and either a crystal rectifier or a bolometer used as a detector.
The panel meter is equipped with lamps at the far end of each scale to indicate which detector is in use. There are also AC and DC outputs for use with a recorder.
Specifications
- Meter Scales VSWR: 1 to 4, 3.2 to 10, 1 to 1.2, and 1 to 1.05;dB, 0 to 10, 0 to 1.6, and 0 to 0.45
- Meter Scale Bolometer: current, 0 to 10 mA
- Meter Accuracy: 0 to 10 dB scale, ±(0.01 dB + 2% of reading);0 to 1.6 dB scale, ±0.02 dB; 0 to 0.45 dB scale, ±0.007 dB
- Bandwidth: 10 to 100 Hz, adjustable with constant gain
- Frequency: 1 kHz, adjustable ±30 Hz
