[Boatanchors] Type 860/VT-17 Tube Question

[Freeberg, Scott (STP)]

Last year I bought a 1930's transmitter out of an estate in Milwaukee Wi.  The picture showed a beautiful 30's wood transmitter about 4' wide.  When it arrived, I realized it was a reproduction.  No problem. No tubes either.

I was just looking at it Sunday night.  It's a 3 tube job. Luckily the builder put some typewritten labels on the transmitter with some tube info.  Uses an unknown 4 pin triode for the crystal controlled oscillator, a 210 buffer, and something called an 860/VT-17 PA. Next to the PA socket is a tall tower.  I couldn't imagine what the tower was for until I saw a picture of an 860 online. Holy moly, what a monster.  There's a label on the transmitter, behind the PA socket, talking about 3 KV.. Yikes!

Has anyone here actually used an 860 before?  It's a monster tube, globe with the plate connection wires coming out of the top, to attach to the tower, a proturberance coming out of the side, again with wires coming out.  It's impressive.  I wonder if I can run this at 10 watt input for the AWA 1929 QSO Party :>>>>

73, Scott WA9WFA