Note
QST, Jan 1947, p. 113. (75A-1) ($375.00)
QST, Feb 1947, p. 100. (nice photo)
QST, Mar 1947, p. 144. (show lighted band indicator)
QST, Jul 1948, p. 2. (a few details)
QST, Jul 1950, p. 77. (75A-2, nice photo of Art Collins. Lots of details.)
QST, Feb 1952, p. 2. (Nice interior photo)
QST, Apr 1952, p. 2.
The first amateur-band receiver from Collins was christened the 75A when it was announced in 1946 and advertised as such until mid-1948. An on/off noise-limiter switch was added and the first production models became the 75A-1. The new Collins receiver brought astonishing technology to the post-WW II ham market. It incorporated the permeability tuned oscillator (PTO) developed by the company during the war, had a linear tuning dial calibrated in 1 kHz increments (2 kHz on 10 and 11 meters), and was extremely stable. Another unusual practice for its time was the use of a crystal-controlled HF oscillator followed by a tunable first IF. The 14-tube, double-conversion set covered the 80 through 10 meter bands.
References
Review. Radio Craft, Feb 1948, p. 32.
Updating. CQ, May 1961, p. 44.
