In a message dated 3/21/02 4:41:13 PM Eastern Standard Time, brett.gazdzinski at wcom.com writes: << Well, it was made in 1946 or before. Did they have pcb's then? When were they invented? Brett N2DTS >> Well Brett..I've seen some of these transformers that came out of transmitters built in the late 40's to mid 70's Bob KC4QLP