The Model 616A was the first Ultra High Frequency signal generator manufactured by Hewlett Packard. It was introduced in the 1948 general catalog, and described in the May-June 1952 issue of the Hewlett Packard Journal.
| The HP 616A in the HP Memory Project Collection |
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| Page 18 of the 1948 Catalog Courtesy of the Hewlett Packard Company |
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| Page 19 of the 1948 Catalog Courtesy of the Hewlett Packard Company |
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| The HP 616A - Inside View of Rear Chassis |
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| The HP 616A - Top Inside View Showing Klystron Oscillator Cavityand Bolometer Circuits |
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