Boosting output of MK136 Stereo Ear

I am trying to use the MK136 to drive the vertical coil in an old television to convert it to a simple oscilloscope for a visual display. I’ve used this fine on some smaller TVs, but on larger ones, it doesn’t seem to be quite powerful enough to drive the coil. I know the NE5532 in this kit can be run at up to +20VDC, what can I do to get a little more “oomph”? I’m not looking for a lot.

You can increase the supply voltage of the kit and get rid of the series resistors in the output.