Johnson Crystal Calibrator (250-28)

Object/Artifact

-

Radio Alpha

Image: CQ, Sep 1955

Image: CQ, Sep 1955

Name/Title

Johnson "Crystal Calibrator" (250-28)

Description

Crystal Calibrator

Category

Frequency Standard

Made/Created

Manufacturer

E. F. Johnson

Date made

1955 - 1964

Valuations

Value

$17.25

General Notes

Note

QST, Jun 1955, p. 143. Allied Radio catalog 1958 (copyright 1957), p. 269. Allied Radio catalog 1960 (copyright 1959), p. 402. Allied Radio catalog 1962 (copyright 1961), p. 279. Allied Radio catalog 1964 (copyright 1963), p. 222.