Note
QST, Jun 1964, p. 180. (BTL, UTL, CTL, CSA, ST)
QST, Jun 1965, p. 173.
QST, Feb 1966, p. 145.
QST, Sep 1967, p. 148.
QST, Jan 1968, p. 160.
QST, Dec 1976, p. 172. (CTL-B to Nov 1979).
BTL-1 to Nov 1979
UTL-A to Nov 1979
ST to Nov 1979
QST, Mar 1980, p. 159. (CTL-B, BTL-A, UTL-A, ST-A)
The ST-A is a refinement of the original ST model. It features 11/64 inch silver contacts. The key is fully adjustable. The arm is offset to bring the navy type knob in a position for ease of sending. It will not tilt under normal keying pressure. Connections to the key are made to a recessed terminal strip at the back of the base. The base is fitted with three large rubber feet. The arm and screws are chrome plated. The base is finished in baked black wrinkle enamel. Red plastic navy type knob.
• No lost motion or drag due to loose or tight pivots.
• Complete solid circuit from contact points to terminal strip.
• Only two adjustments, contact spacing and spring tension.
• Reduced contact bounce due to suspension at levers.
• Closer contact spacing.
• Better feel.