[Hammarlund] ITT modified SP-600

[Kenneth G. Gordon]

Well, the data-plate associated with the BFO says, "MOD FOR I.S.B. AND 
F.S. TELEG."

I know that ISB is Independent Side Band, but what, exactly, is F.S. TELEG? 
Some sort of RTTY, I would suppose.

Anyway, it is very interesting, and the receiver looks to be in excellent 
condition. I wish we knew fuller details of the mod.

Price is way too much for me, though.

Ken W7EKB