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

[Curt at Atari Museum]

Roger,

   Thanks dude, great to know ! :-)



Curt


Roger Merchberger wrote:

> Rumor has it that Vintage Computer Festival may have mentioned these 
> words:
>
>> On Tue, 12 Jul 2005, Curt @ Atari Museum wrote:
>>
>> > 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
>>
>> Yes, it's AC.  That's why it hurts.  DC would feel strange perhaps 
>> but not
>> like AC.  The reason you saw voltage at 80VDC is because your digital
>> meter samples slowly.
>
>
> Or -- some meters when set to DC and fed AC will measure the RMS 
> [kinda DC-equivalent value] voltage of the AC...
>
> 100+V AC * .707 = 70+V DC.
>
> The equation for figuring RMS voltage on sine-wave AC is:
> 1/sqrt(2)
>
> (I've seen up to 110V AC myself [more on hand-cranked military 
> handsets], so that would get awfully close to the 80V the OP saw...)
>
> Just a thought,
> Roger "Merch" Merchberger
>
> -- 
> Roger "Merch" Merchberger   | Anarchy doesn't scale well. -- Me
> zmerch at 30below.com.         |
> SysAdmin, Iceberg Computers
>
>
>


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