"Richard Crowley" bravely wrote to "All" (17 Dec 05 23:30:25)
--- on the heady topic of " Concerned about damaging preamp on turnoff"

RC From: "Richard Crowley"
RC Xref: core-easynews rec.audio.pro:1060288
RC sci.electronics.repair:351810

RC "Doc" wrote in message
RC nk.net...

"William Sommerwerck" wrote in message
...
However, when turning them off, I notice the level meter
slams into the full/max red zone.

Slams into the zone, or slams into the peg stop? The former is
harmless.
The
latter is potentially damaging to the meter, if it happens over and
over.

They're green/amber/red lights.

RC Doesn't even make the top 500 list of things to be concerned
RC about.

Indeed, never mind about the lights and meter needles...
The main thing I'd really be concerned about is damaging junctions.
The reason is that each time a junction carries a substantial reverse
current it might cause some ionization in the semiconductor material.
The consequence of this is a permament shift in the characteristics
such as lower gain and increased noise. So there is some advantage in
protecting junctions likely to encounter such transient spikes.

A*s*i*m*o*v

.... All the world's an analog stage & digital circuits play only bit parts