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|class=oscillators | |class=oscillators | ||
|summary=beat frequency oscillator | |summary=beat frequency oscillator | ||
|image=GR 1304-B Front.jpg | |image=GR 1304-B Front D.jpg | ||
|caption=General Radio 1304-B Beat Frequency Oscillator | |caption=General Radio 1304-B Beat Frequency Oscillator | ||
|series= | |series= | ||
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==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 1304-B Front.jpg | GR 1304-B Front D.jpg | ||
GR 1304-B Rear.jpg | GR 1304-B Rear.jpg | ||
GR 1304-B Top.jpg | GR 1304-B Top.jpg |
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