[net.auto] Amplifier "fade-out"

knight@nmtvax.UUCP (03/04/85)

I have a problem with one of my car stereo amplifiers that I don't quite 
understand.  Occasionally, when I turn off the turn signals, lights or brake
lights, the amplifier output goes to zero, then fades back in.  Note that
this doesn't happen when I turn on the aforementioned objects.  I suspect
that there is a problem with the amplifier being "starved" for current, but
at am a loss to explain why it happens when the objects are turned off, not
turned on.  All of the power connections to the amplifier are either soldered
or screwed on spade lugs, the ground is good, etc.  Any of you automotive
electronics people out there got any ideas?

Thanks in advance,
Bob

bhs@siemens.UUCP (03/11/85)

Bob:

Whenever you turn OFF any current user in your car, including lights, there
will be a voltage surge temporarily. It is well possible that your amplifier
has some sort of surge protection built into it, or that it simply saturates
or goes funny while it is trying to accomodate the sudden change.

Bernard H. Schwab
Siemens RTL, Princeton, NJ