ALPHA 77SX - Like mint condition. Checked out in November 2010 by N4UQ the “Alpha Doctor” with his seal of approval on the back.  Dummy load test data sheet by N4UQ on 11/23/10. Original Power Transformer replaced with Peter Dahl Alpha 77S-4 (2400-3400 VAC secondary Hipersil C-core @ 0.9A CCS). C39 (25uf/4KV) replaced with higher capacity, higher voltage 35uf/5KV from Condenser Products.  Direct physical replacement for original Alpha C39.  Dramatically improves voltage regulation. Full documentation of all mods. Will do 5 KW key-down out into dummy load.  Original Operating and Technical Manual, and custom dust cover.  $8,500.  Pick up in Stuart.

 

Mike W4UM