Thousands of Morse students have started with a key like this, going back to the 1920's.  Perfectly adequate for sending practice and the casual CW user, it will operate any transmitter at a fraction of the cost of a "premium" key.  It is also the perfect "low risk" gift key for the child or grandchild who might be interested in learing code. It is very similar (if not identical) to the key used in the MFJ 557 training set. The key features three-way binding posts,  and both spring tension and contact spacing are adjustable. The mounting hole spacing is 1-1/16"  

This is the famous "Japan ball bearing key," which has been in continuous production since the 1950s.  It has a brass-plated base, silver contacts, a shorting switch, and adjustable ball bearing trunion for smooth and reliable operation under a wide range of circumstances.  Contact spacing and spring tension are easily adjusted and the binding posts are "three-way" to support multiple connection methods.  For connection and adjustment instructions click here. 

Need a base for your new AMECO K-4 key?  Our new universal key base is a perfect match. It's a black crinkle-finish aluminum plate, 5.5" x 3"  with four cushioned feet, tapped #8 screw holes to match the K4 (and many other keys with 1-1/2" hole spacing), and two brass screws with tapered heads so they won't interfere with the K-4's shorting switch.  Made with pride in the USA.

Key Base AM-UKB - $15.95