What is "Spiking" a coil to check bandwidth?

[radeonut]

I worded it incorrectly. The instructions are under Picture IF Sweep Alignment.
For the section where the 1st IF is to be adjusted, the wording is "Spiking L202 determines bandwidth". (L202 is between the tuner and 1st IF grid)
The coil as it was, was already tight. I don't think I need to touch it, but interestingly, I've tried a couple of different tubes for the first IF. One of them gives a nice bandwidth, placing the markers in the proper positions, but difficult to adjust the sweep waveform to get a decent double-peak. A different tube (same type) gives a good shape to the waveform with a nice double peak, but the bandwidth is narrower, placing the markers too far down the slope.