1311-A: Difference between revisions

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|model=1311-A
|model=1311-A
|class=oscillators
|class=oscillators
|summary=audio oscillator
|summary=Audio oscillator
|image=GR 1311-A Front.jpg
|image=GR 1311-A Front.jpg
|caption=General Radio 1311-A Audio Oscillator
|caption=General Radio 1311-A Audio Oscillator
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|designers=
|designers=
|manuals=
|manuals=
* [[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}}
}}
}}
The '''General Radio 1311-A Audio Oscillator''' was introduced in {{Catalog U}} and remained available through {{Catalog 1978}}.  
The {{Title|General Radio 1311-A Audio Oscillator}}, a transistorized Wien-bridge audio oscillator with transformer output, was introduced in {{Catalog R}} and remained available through {{Catalog 1978}}.  


The General Radio 1311-A Audio Oscillator is a transistorized Wien-bridge audio oscillator with transformer output. 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]] Inductance and [[1620-A]] Capacitance Measurement Systems.
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|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==


* '''Frequency Range:''' 11 fixed frequencies – 50, 60, 100, 120, 200, 400, 500, 1000, 2000, 5000, 10,000 Hz selected by rotary switch. A vernier provides a ±2% adjustment about nominal.
* '''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).
* '''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 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).
* '''Output Current:''' Continuously adjustable from 0 to 40, 130, 400, 1300, 4000 mA, short circuit (approx)


==Links==
==Links==


* [[Media:GR Exp 1311 08_1962.pdf|Experimenter describing Type 1311-A August 1962]]
* [[Media:GR Exp 1311 08_1962.pdf|Experimenter August 1962 describing Type 1311-A]]
* [[Media:Electronics-1963-02-01 Ref GR 1311-A.pdf| R.G.Fulks, ''Novel feedback loop stabilizes audio oscillator''; Electronics Vol.36 No.5, 1 Feb 1963.
* [[Media:Electronics-1963-02-01 Ref GR 1311-A.pdf| R.G.Fulks, ''Novel feedback loop stabilizes audio oscillator''; Electronics Vol.36 No.5, 1 Feb 1963.
]]
]]
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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

General Radio 1311-A
Audio oscillator
General Radio 1311-A Audio Oscillator

Available from 1963 to 1978+

Manuals
Catalog History
 Document Year Page
Catalog R 1963 109
Catalog S 1965 135
Catalog T 1968 204
Catalog U 1970 226
Catalog73 1973 79
Catalog78 1978 125
(All manuals in PDF format unless noted otherwise)

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

Photos

  • Late model, white front-panel 1311-A as part of a 1240-A

    Late model, white front-panel 1311-A as part of a 1240-A

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