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1390-B: Difference between revisions
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{{GR Product | |||
|model=1390-B | |||
|class=generators | |||
|summary=random noise generator | |||
|image=GR 1390-B Front.jpg | |||
|caption=General Radio 1390-B Random Noise Generator | |||
|series= | |||
|introduced=1961 | |||
|discontinued=(?) | |||
|designers= | |||
|manuals= | |||
* [[Media:GR 1390-B Random Noise Generator 11_1965.pdf|General Radio 1390-B Random Noise Generator Manual 1390-0100-K (1965)]] | |||
}} | |||
The '''General Radio 1390-B''' is a random noise generator [[introduced in 1961]]. | The '''General Radio 1390-B''' is a random noise generator [[introduced in 1961]]. | ||
It first appears in [[Media:GRwiki Catalog Q OCR 1961.pdf|Catalog Q]] and remained available through | It first appears in [[Media:GRwiki Catalog Q OCR 1961.pdf|Catalog Q]] and remained available through Catalog78. | ||
The Type 1390-B provides random noise on three ranges from 20 kHz to 5 MHz. | The Type 1390-B provides random noise on three ranges from 20 kHz to 5 MHz. | ||
It produces electrical noise using a [[6D4]] gas-discharge tube, V2, operated in the field of a permanent magnet. | It produces electrical noise using a [[6D4]] gas-discharge tube, V2, operated in the field of a permanent magnet. | ||
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* '''Output Impedance:''' 900 Ω | * '''Output Impedance:''' 900 Ω | ||
* '''Output Attenuator:''' 1, .1, .01, .001, and .0001 times the RMS Voltmeter reading. | * '''Output Attenuator:''' 1, .1, .01, .001, and .0001 times the RMS Voltmeter reading. | ||
==Links== | ==Links== | ||