The 1960s Vade-Mecum - the worlds most complete USA / British / Euro tube manual...ever. It's a huge book at 300 pages - just for tube comparison! This is it's last known edition from 1965; and in english - which is very rare. A practical warning for tube beginners… this book is not an ordinary tube "sub" guide. Rather, it is complex and versatile. So it will require patience to understand and master. The some 300 pages of detailed cross reference and inter-change data - cover (more or less) every audio tube known (including rare old triodes)! This includes all known signal and mid-size power tubes (see photos) - Western Electric audio tubes, european, UK, industrial and antique types. In the old days - the few prints we could {ever} find, were kept under lock & key by tube dealers, experts and distributers. Never given to layman or hobbyists - for the info is far too vast! It's a perfect must-have reference for the owners of AVO & Hickok laboratory testers and worldwide vintage tube specialists. The book details interchange and substitution possibilities between the thousands of rare USA/British and Euro continent tubes, 1930s - 1960s. Not to be confused with a "receiving tube tube manual". The Vade-Mecum that has dosen't focus diagrams. Rather the Vade-Mecum is used to compare tube "capability" and performance in circuits with other US/foreign possibilities. With this master guide at hand, one may give consideration to a vast world of compatibilities - never before understood. An example…if you must compare a RE604, 300B and then to a French E406N at different plate voltages and currents?? -- You will then want this amazing book. Simply put, the Vade-Mecum is known as the boss of all tube substitution manuals! Be one of the few to own this rare book… Good condition, old CLC reprint, cloth bound. Has a few slight folded pages, but all wonderfully clean and legible. Just this (1) one available now - just removed from our 40 year archives.  Overseas USPS Priority Mail with full tracking.