[TenTec] New out of box Titan 111 does'nt work. Help

[William Terry]

 Opened box . Performed 10 meter mod and installed transformer.  Added power
  Hooked up drive and low swr antenna.  On standby ant loads well.  Punched
operate.  Plate voltage 3000.  Applied drive. Grid current goes down?? Plate
current goes up.  Load and Tune no effect. No output.  Same setup with
Hercules 11. Works great.
I find it hard to believe that brand new TenTec amp defective so I must be
doing something stupid. Any ideas?
TenTec on holiday.

Bill K4BYR