SG marking on PCB component

[made2hack]

Hey all,

What does SG mean on a component definition on a PCB?

If R = Resistor, C = Cap, D = Diode, L = Inductor, what is SG?

The component in question is cylindrical / axial about the size of a 0.5 W resistor, no bands, just pink bands over the transparent looking package?

Sorry, I don't have a photo, if need be, will take one.

[radioFlash]

Perhaps spark gap? What kind of device is this component in?

[made2hack]

It is in the beam circuitry from an old CRT Monitor.

[SeanB]

Spark gap for sure then. Used to protect whatever silicon is driving the CRT if the tube flashes over for any reason. In many cases you find a regular neon lamp used in this application if the voltage is under 50V above the cathode voltage. You will often find the CRT base in colour sets also has a built in set of spark gaps on all electrodes, and very high voltage ones on the focus and A1 voltage connections, as they have up to 5kV on them.