Note
QST, Mar 1955, p. 80.
QST, Mar 1955, p. 111.
QST, Apr 1955, p. 3.
QST, Jul 1955, p. 2. (details)
Allied Radio catalog 1956 (copyright 1955), p. 199.
QST, Jul 1956, p 2. (optional gear reduction tuning knob)
QST, Sep 1957, p. 2. (stability, with charts)
QST, Feb 1960, p. 141.
References
A converter for general coverage. CQ, Sep 1962, p. 44.
A wideband filter. CQ, Jan 1964, p. 50.
Additional improvements. CQ, Sep 1966, p. 37.
Adding a product detector. CQ, Oct 1966, p. 29.
