Somewhat OT Knob & Tube wiring (was Re: Power and the RA82)

[plato computer]

yeah, it's AC alright.  20hz at 72volts is nothing to screw around with. 
It's like riding a slow wave... it don't necessarily kill you... but it 
sure does suck.

You know why it was 20hz / 72volts? Because it has to do with the way 
that the original bells inside of the circuitry on a phone would react so 
perfectly to that.  I love em' old phones.

-----Original Message-----
From: "Curt @ Atari Museum" <curt at atarimuseum.com>
To: General at smtp5.suscom.net, "Discussion at smtp5.suscom.net":On-Topic and 
Off-Topic Posts <cctalk at classiccmp.org>
Cc: 
Date: Tue, 12 Jul 2005 15:23:35 -0400
Subject: Re: Somewhat OT Knob & Tube wiring (was Re: Power and the RA82)

> Still burns and leaves the God-awefullest metal taste in your mouth
> when 
> you get hit with a ring surge,    You sure its AC?   Doesn't make
> sense, 
> but voltage on my meter would jump up from 48-52vdc to around 78-80vdc 
> on the DVM
> 
> 
> Curt
> 
> 
> Paul Koning wrote:
> 
> >>>>>>"curt" == curt  <@ Atari Museum" <curt at atarimuseum.com>> writes:
> >>>>>>            
> >>>>>>
> >
> > curt> AC "zaps" for a 10th of second at 110v isn't too bad when
> > curt> crawling around running wires, it smarts and leave a nasty
> > curt> tingling feeling in your teeth, makes you super wary the rest
> > curt> of the day.
> >
> > curt> What is the most painful is hooking up a telco line (I used to
> > curt> work for an alarm company many many moons ago) and it just
> > curt> never failed that when you were wiring up the RJ31X fail-over
> > curt> box to the alarm system, somebody would call into the line and
> > curt> man does DC hurt and burn ...
> >
> >Ring isn't DC.  The steady state voltage on a phoneline is -48V DC
> >(give or take quite a lot; I think the spec says the max is -60).
> >Ring voltage is 10 Hz AC, around 100 volts.
> >
> >     paul
> >
> >
> >
> >
> >  
> >
> 
> 
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