[R-390] OT: need online source of Army/Navy electronics books

[Grayson Evans]

Hoping someone in this group might be able to help.

I am trying to find a downloadable copy of one of the old Navy or Army ™ textbooks on basic electronics used to train electronics technicians.  
I used to know a site that had a lot of old technical books (vacuum tube era) probably printed in the 1940’s or 50’s in PDF form for downloading
I have downloaded several books from the site a few years ago, but now I can’t find it.

I have found these old military text books excellent for a beginner learning electronics to get into ham radio.  The older 1950 and 60 ARRL handbooks were also good (this site had those as well).  Especially someone that is interested in vacuum tube electronics.

I am familiar with this site:
http://www.tubebooks.org/technical_books_online.htm

But its not the one Im looking for. 

Hoping someone here knows where I can get a copy of one of these old texts.

THANKS!

Grayson
TA2ZGE - Ankara, Turkey
KJ7UM