IIC+ Static Electricity POP

[MesieBooga]

A seller of a IIC+ emailed me the following. Anyone heard of this before?

"One thing about the Mark II series that is strange is that when the lead channel is engaged for the first time after it is powered up there is a pop due to static electricity build up. Mesa told me that this could be permanently fixed by soldering a resistor (a 50 cent part) to the lead channel switch. Being that I am terrible with a soldering iron and would probably screw it up, I elected to switch the lead channel on and off while in standby mode before powering the amp on which took care of the pop. If you're good with a soldering iron you might want to call Boogie, get the fix instructions, and do the permanent fix yourself."

 

[Boogiebabies]

I have heard of the EQ popping when engaged, but a lead channel pop I have only heard with a noisy or an LDR going bad. Every IIC+ I have ever seen had a 470ohm resistor off the lead pot to the lead LDR 3 to ground anyway. The EQ pop is the same issue. That is a 62K off the ground trace at the top of the fader board to ground. Easy fix. Mesa has changed a lot of noisy or bad LDR's in the IIC's. The true IIC+ would already have one.

 

[MesieBooga]

IT'S A " GAIN BOOST".

 

[Boogiebabies]

It is the same thing as Pull Deep. The circuit was not new to the IIC+.
SSDD.