1215-C: Difference between revisions
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The {{Title|General Radio 1215-C Unit Oscillator}} was introduced in {{Catalog R}} and remained available through {{Catalog 1973}}. | The {{Title|General Radio 1215-C Unit Oscillator}} was introduced in {{Catalog R}} and remained available through {{Catalog 1973}}. | ||
The Type 1208-C is a general purpose frequency source covering 50 to 250 MHz. It finds use as a generator for bridges, admittance and impedance meters. Direct amplitude modulation at audio frequencies is provided by a front panel phone jack | The Type 1208-C is a general-purpose frequency source covering 50 to 250 MHz. It finds use as a generator for bridges, admittance meters, and impedance meters. | ||
Direct amplitude modulation at audio frequencies is provided by a front panel phone jack. | |||
With an accessory [[1000-P6|1000-P6 Crystal Diode Modulator]], frequencies from 0 to 5 MHz can be used to provide amplitude modulation. | |||
As a unit oscillator, the 1215-C requires an external power supply, type [[1203-B]] is recommended. | |||
==Specifications== | ==Specifications== | ||
* '''Frequency Range:''' 50 to 250 MHz | * '''Frequency Range:''' 50 to 250 MHz | ||
* '''Calibration Accuracy:''' ±1% | * '''Calibration Accuracy:''' ±1% | ||
* '''Warmup Frequency Drift:''' 0.4% typical | * '''Warmup Frequency Drift:''' 0.4% typical | ||
* '''Output:''' 100 mW into | * '''Output:''' 100 mW into 50 Ω with Type 1269-A power supply | ||
==Links== | ==Links== | ||
* [[Media:GR Exp Unit Oscillators 08_1963.pdf|Experimenter describing Unit Oscillators]] | * [[Media:GR Exp Unit Oscillators 08_1963.pdf|Experimenter August 1963 describing Unit Oscillators]] | ||
* [[Media:2367681 Patent Butterfly tuned circuit.pdf|Patent for the Butterfly Tuning Circuit]] | * [[Media:2367681 Patent Butterfly tuned circuit.pdf|Patent for the Butterfly Tuning Circuit]] | ||
* Compatible with [[908-P1|908-P1 Synchronous Dial Drive]] and [[908-R96|908-R96 Synchronous Dial Drive]] | |||
==Photos== | ==Photos== | ||
Revision as of 19:30, 8 May 2024
The General Radio 1215-C Unit Oscillator was introduced in Catalog R (1963) and remained available through Catalog 1973.
The Type 1208-C is a general-purpose frequency source covering 50 to 250 MHz. It finds use as a generator for bridges, admittance meters, and impedance meters.
Direct amplitude modulation at audio frequencies is provided by a front panel phone jack. With an accessory 1000-P6 Crystal Diode Modulator, frequencies from 0 to 5 MHz can be used to provide amplitude modulation.
As a unit oscillator, the 1215-C requires an external power supply, type 1203-B is recommended.
Specifications
- Frequency Range: 50 to 250 MHz
- Calibration Accuracy: ±1%
- Warmup Frequency Drift: 0.4% typical
- Output: 100 mW into 50 Ω with Type 1269-A power supply
Links
- Experimenter August 1963 describing Unit Oscillators
- Patent for the Butterfly Tuning Circuit
- Compatible with 908-P1 Synchronous Dial Drive and 908-R96 Synchronous Dial Drive
Photos
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12AT7 Oscillator Tube
