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1214-D: Difference between revisions
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(Created page with "Type '''1214-D Unit Oscillator (120cps)'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Oscillators") |
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{{GR Product | |||
|model=1214-D | |||
|class=oscillators | |||
|summary=Unit Oscillator | |||
|image=GR 1214-D Close-up.jpg | |||
|caption=General Radio 1214-D Unit Oscillator | |||
|series=1214 | |||
|introduced=1959 | |||
|discontinued=1965 | |||
|designers= | |||
|manuals= | |||
* [[Media:GRwiki 1214-A,D,E,M Unit Oscillator 922-D 1960.pdf|General Radio 1214 Series Unit Oscillator 922-D 1960]] | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio 1214-D Unit Oscillator}} was introduced in {{Catalog P}} and remained available through {{Catalog S}}. | |||
The Type 1214-D is unit oscillator specifically designed as a generator for the Type [[1611-B]] Capacitance Test Bridge. Operating at a frequency of 120 Hz, the recommened frequency for testing electrolytic capacitors. The 1214-D output circuit uses two transformers, the first serves as a load for the oscillator tube, the second acts as an adjustable match for the Type [[1611-B]] bridge. A front panel phone jack acts as an input to the matching transformer for an external oscillator. The single 117N7 tube contains the power supply Rectifier and Beam PA as the oscillator. A Thyrite element is used in the 117N7 grid circuit to limit oscillator amplitude. Like others in 1214 family the 1214-D uses a transformerless power supply. Other members of Type 1214 family are [[1214-M]], [[1214-A]], and [[1214-E]]. | |||
==Specifications== | ==Specifications== | ||
* '''Frequency:''' 120 cycles ±2% | |||
* '''Output Impedance:''' Four impedances to match the impedance of the Type 1611-B Capacitance Test Bridge at four multiplier positions | |||
* '''Output:''' At least 2000 mW into matched load | |||
* '''Distortion:''' Less than 3% into a matched load | |||
==Links== | ==Links== | ||
* [[Media:GR Exp 1214-AS2 08_1956.pdf|Experimenter describing Type 1214-AS2 August 1956]] | |||
* [[Media:GR Exp 1214-D 07_1958.pdf|Experimenter describing Type 1214-D July 1958]] | |||
* [[Media:GR 1611-B Capacitance Test Bridge 1611-0100-H 01-1965|General Radio 1611-B Manual]] | |||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 1214-D Front.jpg | |||
GR 1214-D Left.jpg | |||
GR 1214-D Rear.jpg | |||
GR 1214-D Right.jpg | |||
GR 1214-D Inside Top.jpg | |||
GR 1214-D Inside Rear.jpg | |||
GR 1214-D Inside Bottom.jpg | |||
</gallery> | </gallery> | ||
[[Category:Oscillators]] | [[Category:Oscillators]] | ||
[[Category:Unit Instruments]] | |||