28 Feb
2000
28 Feb
'00
10:39 a.m.
Careful, Joe . . . the ring voltage spec I remember said it was about 128
volts AC centered about the battery voltage, which is conventionally -48
volts. That's where the 80-volts at 20 hertz comes from, since that's what
you see by way of a rectifier diode. That's not a true sinusoid, though,
it's the humps from a sinusoid rectified to ground when the median of the
sinusoid is at -48Vdc.
I don't really know that this can kill or even harm you in some other major
way, but it's unpleasant enough that it makes sense to avoid it. That urge
to pull my hand out of the box when I'm bitten by a higher voltage than I
like is what's made me unwilling to work on TV sets with their puched
chassis, etc.
Dick
-----Original Message-----
From: Joe <rigdonj(a)intellistar.net>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Monday, February 28, 2000 9:45 AM
Subject: Re: Is ringing voltage dangerous?
At 05:56 AM 2/28/00 -0800, Danial wrote:
>You know, I've been told it's painful, but is it dangerous?
>I just told another group about the supply I have (It outputs 110AC, 30hz,
>.06 amp), and realized it's 110. Isn't that dangerous? If I really did
zap
my kid brother
with it, would it just hurt or could it really HURT him?
-------
No, it'll just hurt him. It'll sure get his attention though! I've been
shocked by them dozens of times. FWIW the normal (US) telephone ringing
voltage is only 48 volts or so. The old telephones and military field
phones with the hand cranks with put out over 100 volts. Those hurt!
Joe