Yes, i am asking about the booklets (NOT the magazines) from at least the 1950's (but before the 1970's as i remember). The Baby Bird (GooGull) "hits" are at least 90% for the magazine, and the balance also does not count. Site snooping on some of the "recommendations" produced nada WRT to what i am looking for.
What i am looking for is the one about (AC) transformers; 50 and
60Hz, E-core and C-core. Sets of tables,each one organized 1st column by power; giving turns per volt, core area, a design factor, and i do not remember what else.Q: where can i get that booklet - either used paper or online? Thanks.