{Collins} 6146 Variety in KWM-2A

I know this has been talked about before, but I cannot locate any messages
on it in the Archives.

Which variety of 6146 is best for the KWM-2A ? I have a pair of NIB 6146B's.

Tnx, Dick, W1KSZ

This archive was generated by a fusion of Pipermail (Mailman edition) and MHonArc.