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1208-B: Difference between revisions
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{{GR Product | |||
|model=1208-B | |||
|codes=AMEND | |||
|class=oscillators | |||
|summary=Unit Oscillator | |||
|image=GR 1208-B Close-Up.jpg | |||
|caption=General Radio 1208-B Unit Oscillator | |||
|series=1208 | |||
|introduced=1956 | |||
|discontinued=1961 | |||
|designers= | |||
|manuals= | |||
* [[Media:GR 1208-B Unit Oscillator 1208-0100-G 03_1962.pdf|General Radio 1208-B Unit Oscillator Manual 1208-0100-G 1962]] | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio 1208-B Unit Oscillator}} was introduced in {{Catalog O}} and remained available through {{Catalog Q}}. | |||
The Type 1208-B is a general-purpose frequency source covering 65 to 500 MHz. Its an updated version of the [[1208-A]], most of the improvements are mechanical. It finds use as a generator for bridges, admittance meters, and impedance meters. By the use of sliding contacts in the oscillator circuit, sweep must be limited duty and slow speeds. In combination with an [[874-GA|874-GA Attenuator]], an [[874-VR|874-VR Voltmeter Rectifier]], and an [[874-VI|874-VI Voltmeter Indicator]] it provides an accurately known output voltage for receiver testing. | |||
Direct amplitude modulation at audio frequencies is introduced at a front panel jack. With a [[1000-P6|1000-P6 Crystal Diode Modulator]] accessory, modulation from 0 to 20 MHz is possible that is essentially free of FM. | |||
As a unit oscillator, the 1215-B requires an external power supply, type [[1203-B]] is recommended. | |||
==Specifications== | ==Specifications== | ||
* '''Frequency Range:''' 65-500 MHz | |||
* '''Frequency Calibration Accuracy:''' 2% at no load | |||
* '''Warm-up Frequency Drift:''' 0.5% | |||
* '''Output Power:''' 100 mW minimum, 300 mW at the center of range into a 50-ohm load | |||
==Links== | ==Links== | ||
* [[Media:GR Exp 1215-B 04_1955.pdf|Experimenter October 1955 describing Updated Unit Oscillators]] | * [[Media:GR Exp 1215-B 04_1955.pdf|Experimenter October 1955 describing Updated Unit Oscillators]] | ||
* [[Media:GE 2C43 Triode Datasheet 12_1961.pdf |GE 2C43 Lighthouse Triode Datasheet]] | |||
* [[Media:RCA 2C43 Triode Datasheet.pdf|RCA 2C43 Lighthouse Triode Datasheet]] | |||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 1208-B Front.jpg | |||
GR 1208-B Front A.jpg | |||
GR 1208-B Left.jpg | |||
GR 1208-B Rear.jpg | |||
GR 1208-B Right.jpg | |||
GR 1208-B Shield Inside.jpg | |||
GR 1208-B Probe.jpg | |||
GR 1208-B Inside Left.jpg | |||
GR 1208-B Inside Rear.jpg | |||
GR 1208-B Inside Right A.jpg | |||
GR 1208-B Inside Right.jpg | |||
</gallery> | </gallery> | ||
[[Category:Oscillators]] | [[Category:Oscillators]] | ||
[[Category:Unit Instruments]] | [[Category:Unit Instruments]] | ||