What exactly is an MOV...in this following context?

[mrid]

Re: What exactly is an MOV...in this following context?

Mesa uses those in all of their amps also..

I thought I recognized that green disk...

[STRATDELUXER97]

Re: What exactly is an MOV...in this following context?

Mesa uses those in all of their amps also..

[Stevo]

Re: What exactly is an MOV...in this following context?

It's a metal oxide varistor. Those are used for transient voltage supression aka spikes.
They are like a heavy duty zener diode, which stops the flow of current in one direction, and stops it in the other direction also, but at specified voltage thresholds.
Your 240 volt power would blow the original MOV out.

[Young Angus]

Re: What exactly is an MOV...in this following context?

It the MOV the green thing, which i thought was a capacitor, in this pic?

[Young Angus]

Okay so the komet people sent me instructions on how to convert my komet to 240volt operation, and they talk about changing an MOV in the following quote from their email:

"Remove the 130 Volt MOV on the back of the on/off switch.

Install a 250 Volt type MOV across the on/off switch where the 130 MOV was..

Then solder the Black and Blue wires together, make sure they are well insulated with heat shrink material.
( See pic )

Solder the White wire to the left side of the MOV and terminal, solder the Purple wire to the right side."

They have actually made the komet to operate under both american power and 240volts, all it needs is some different wires soldered somewhere and a changed one of these MOV's. My dad is more than qualified to work on electronics so i was going to get him to help me with it and we should be able to do it no worries, and ill learn something at the same time, but i dont know what this MOV is and before i ask my dad i was wondering if anyone could tell me what it is?

Cheers