This is not a BAMA download. I specifically purchased the original HT-37 manual, pulled the staples and separated out each page and made a hi resolution scan of each page in colour, including both front and back covers. Special attention is paid to legibility of the schematic, since most current and new owners have to perform routine maintenance on these old rigs, in particular, re-capping. Most manuals I have downloaded were rather blurry with their schematics, particularly the last part of the fold-out schematic. The only other download site you will find for this particular manual is on the Novice Rig Round-up FaceBook page.
Originally published in Jan 1961, uploaded by gary.