====== Single Paddle Electronic Keyer Model 670 ======
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===== Description =====
Designed specifically for use with the Ten-Tec Century/21 Transceiver.  Features self-completing dits and dahs, preset weighting for optimum articulation in the most used speed range, speed control with a range between 6 and 50 words per minute, and an enclosure that matches the transceiver.  Powered by the Century/21 power supply, no separate on-off switch is needed for the keyer.  Incorporates low voltage positive transistor switching to interface with the Century/21 keying circuit (it will not key transmitters with cathode or grid-block keying).

===== Specifications =====
  ***Keyer Output Circuit:** Positive low voltage transistor switch.
  ***Speed Range:** 6 to 50 WPM.
  ***Time Base:** Keyer starts with paddle actuation.
  ***Character Generation:** Self-completing dits and dahs.
  ***Weighting:** Dit length increased approximately 10% at 20 WPM.
  ***Power Required:** 10 - 14 VDC taken from transceiver supply.
  ***Paddle:** Single type.  Molded plastic, with adjustable contact spacing.
  ***Semiconductors:** 1 Integrated Circuit; 5 Transistors; 9 Diodes.
  ***Finish:** Gray front panel, black pebble vinyl top and sides.
  ***Size:** HWD 2" x 4" x 6"
  ***Weight:** 1 lb, 8 oz.