"JSF" wrote in message
. ..
OOO crap did any one notice the class d amp WAS running off the 120V line
input NO Isolation to the Finel D amp section to the speakers, WOW
SHOCKING.

"james" wrote in message
...
On Thu, 04 Jan 2007 18:17:51 -0800, Frank Gilliland
wrote:

+++No kidding. My favorite hobby has nothing to do with electronics; I
+++rebuild & restore old Coleman lanterns. I would gladly trade any of
+++the crusty old CB's from my pile for a crusty old Coleman lantern.
**************

My favorite hobby is astronomy. There bigger is definitely better.


james



Not to uncommon for a design that WILL work of of line voltage to not show a
transformer even though it should have one. This may be in the verbal
description of the AMP. Also any High Power amp may have a couple of hundred
volts DC on the speaker terminals if there is componet failure. There should
be circuitry to prevent this.whether it is line isolated or not. Typically
the protection circuit CROWBARS the power supply blowing the fuse(s). Again
it is not uncommon for something like this to not be included in the draft
copy of an amp design.