Note
73, Jul 1966, p. 88.
Ham Radio, Aug 1973, p. 74.
Ham Radio, Sep 1973, p. 90.
Ham Radio, Oct 1973, p. 78.
Ham Radio, Nov 1973, p. 96.
Ham Radio, Dec 1973, p. 68.
Ham Radio, Mar 1974, p. 76.
Either a huge gap in advertising, or it was not sold continuously from 1966 to 1973. But in all that time, the price did not go up.
Tubes: (1) 6U8, (1) 12AX7, (1) 6BQ5, (1) 2E26