Mystery 1960's B&W Balun?

[ThaDood]

Well, can anyone ID and give spec's to this Balun? It's a B&W model # RC-781, all solid metal construction, with female N-connector feed point, galvanized steel 5/8" wire rings, ceramic insulators, and the body shape resembles what was drawn in Sex Edu for the female anatomy. If I remember right, the toroid was was 1.5". This Balun was held together with 17 screw points. Definitely, constructed from a different era. I've actually e-mailed B&W about this, and they even said that it was too old for them to ID and give spec's on. However, they did suspect that this Balun was for RX only. So, does anyone else have a clue? How did I get this? The B.O.C.E.S. electrical instructor, (At the school that I was attending too in 1985.), gave it to me, as well as his collection of late 1970's 73 and CQ magazines. (Yeah!!! I still have them.) 

[Josh]

I don't think these have any transformative circuit, they just go from balanced to unbalanced lines. Could always take it apart to see. As such it might be able to take a good bit of power. Now if it was one of the bw baluns for the receive only or qrp version of their folded dipole, do not tx into it with more than a few watts.