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One of the models from HP's 520 series. There are 44 vacuum tubes in this model.
This unit was made in 1960 but the model actually dates from the mid-50's.
Serial Number:  | 010-04048 |
Year of Manufacture:  | 1960 (Capacitor stamped with "6017"). The manual contains dates from 1954 to 1956. |
Date of Receipt:  | ~1999 |
State upon Receipt:  | Functional. Some scratches in cabinet paint but very clean and very good overall condition. |
Date:  | 2006 Apr 27 |
Procedure:  | Powered up. Functional. |
.. | Hewlett-Packard 521C | ..
Early Digital Test Equipment |
bhilpert |