| Summary: | A Hammarlund SUPER-PRO SP-210 communications receiver
of approximately 1940 design was rebuilt using modern
solid-state components and associated circuitry in
replacement of the original eighteen vacuum tubes.
Replacement was effected in a stage- for-stage manner so as
to utilize, wherever practicable, the original system of
operation and particularly the existing tuned circuits for
which the receiver was famous. The project goals were to
gain experience in the applications of classroom theory to
practical electronics, to observe the problems associated
with both vacuum tube and solid-state circuitry, and to
provide a starting point for continued research in
electronics.
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