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 BTL-A is the same mechanicm is as the UTL-A, but is mounted on a base. It can be used with any electronic keyer. The chrome plated brass lock nuts, spring tension screw, and contact screws are instrument type.
There are no exposed binding posts. 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 whole assembly is beautifully finished in contrasting black, red, and chrome. The frame and base are finished in baked black wrinkle enamel. The levers are chrome plated and the paddles are red plastic.
• 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.
• Paddle spacing may be changed by moving one or both paddles from the inside of the levers to the outside.
• Better feel.