[Heath] Heathkit IGW-47 manual

[Chris Kepus]

Hi Gang(s),
I was doing an archeological dig in my stash last night and came across a
Heathkit IGW-47 sine / square wave generator in pretty decent shape.
Thought I might have a manual. NOT :-(
Looked at all the known sites for a copy or schematic.  No joy.  
Anyone have a IGW-47 manual for lend or sale? For those that worked in
Benton Harbor, did this unit supersede a tube model of similar design? Model
#?   Please reply direct.  Thanks for the bandwidth.
73,
Chris
W7JPG