[Amps] Direct rectification of AC mains to drive the amp,

Bill Turner dezrat1242 at yahoo.com
Sun Oct 6 00:09:10 EDT 2013


ORIGINAL MESSAGE:          (may be snipped)

On Sun, 06 Oct 2013 00:44:46 +0000, Manfred wrote:

>The 
>same applies to Bill's battery/inverter solution - it's safe to power 
>the amp from teh battery/inverter, but NOT the scope! 

REPLY:

Once again, we disagree. 

Think about it:  With a battery powered scope and using the dual probe ADD +
INVERT mode, the only connection between the HV and the scope chassis is
through the two high impedance probes. Remember, the scope chassis isn't
connected to anything. 

I just went out to the shack and measured my Tek 10x probes. They are 9 megs
from tip to center conductor of the BNC. As I recall the resistor is
paralleled by a few pF. Wouldn't hurt a fly at 60 Hz. 

Or you could get a 40 MHz Fluke ScopeMeter for several thousand dollars.
That works too.  :-)

73, Bill W6WRT


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