[Hallicrafters] HA-1 Keyer, was: Question About Hallicrafters HT-46/SX-146

[Roy Morgan]

Bill and others,

Bill mentioned the HA1 Keyer.  I have a couple of them here, one in like 
new condition.  He also mentioned the HA-1A version. I have not heard of 
that one. what are the differences between the original and the A model?

Roy