1311-A: Difference between revisions
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* [[Media:GR 1311-A and AU Oscillator 1311-0100-D 3_1967.pdf|General Radio 1311-A and AU Audio Oscillator Manual 1311-0100-D 1967]] | |||
* [[Media:1311-A Audio Oscillator Manual.pdf|General Radio 1311-A Audio Oscillator Manual 1311-0100-C 1965]] | * [[Media:1311-A Audio Oscillator Manual.pdf|General Radio 1311-A Audio Oscillator Manual 1311-0100-C 1965]] | ||
{{Catalog History}} | {{Catalog History}} | ||
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The switched output frequencies correspond to commonly used bridge generator frequencies. A delta frequency control is available on the front panel to fine-tune the frequency. Although designed as a bridge oscillator, the 1311-A is also well suited for audio testing, given its low hum and distortion levels. | The switched output frequencies correspond to commonly used bridge generator frequencies. A delta frequency control is available on the front panel to fine-tune the frequency. Although designed as a bridge oscillator, the 1311-A is also well suited for audio testing, given its low hum and distortion levels. | ||
As a bridge oscillator, it is part of the [[1660-A]] | The 1311-A is part of the [[1240-A|1240-A Bridge Oscillator-Detector]]. As a bridge oscillator, it is part of the [[1660-A|1660-A Inductance Measurement System]] and the [[1620-A|1620-A Capacitance Measurement System]]. | ||
==Specifications== | ==Specifications== | ||
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GR 1311-A Bottom.jpg | GR 1311-A Bottom.jpg | ||
GR 1311-A Top.jpg | GR 1311-A Top.jpg | ||
GR 1240-A Close-Up.jpg | Late model, white front-panel 1311-A as part of a 1240-A | |||
</gallery> | </gallery> | ||
[[Category:Oscillators]] | [[Category:Oscillators]] | ||
[[Category:Introduced in 1963]] | [[Category:Introduced in 1963]] | ||
Latest revision as of 08:34, 17 October 2024
The General Radio 1311-A Audio Oscillator, a transistorized Wien-bridge audio oscillator with transformer output, was introduced in Catalog R (1963) and remained available through Catalog 1978.
The switched output frequencies correspond to commonly used bridge generator frequencies. A delta frequency control is available on the front panel to fine-tune the frequency. Although designed as a bridge oscillator, the 1311-A is also well suited for audio testing, given its low hum and distortion levels.
The 1311-A is part of the 1240-A Bridge Oscillator-Detector. As a bridge oscillator, it is part of the 1660-A Inductance Measurement System and the 1620-A Capacitance Measurement System.
Specifications
- Frequency Range: 11 fixed frequencies selected by rotary switch – 50, 60, 100, 120, 200, 400, 500 Hz; 1, 2, 5, 10 kHz; ±2% vernier
- Power Output: 1 W into matched load; taps provide at least 0.5 W output into any resistive load between 80 mΩ and 8 kΩ
- Output Voltage: Continuously adjustable from 0 to 1, 3, 10, 30, or 100 V, open circuit
- Output Current: Continuously adjustable from 0 to 40, 130, 400, 1300, 4000 mA, short circuit (approx)
Links
- Experimenter August 1962 describing Type 1311-A
- R.G.Fulks, Novel feedback loop stabilizes audio oscillator; Electronics Vol.36 No.5, 1 Feb 1963.
Photos
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Late model, white front-panel 1311-A as part of a 1240-A
