Re: Strange voltage readings=Half-Wave Rectifier?


"Dana" <raff242@xxxxxxxxx> wrote in message news:12hjaco8ijtm128@xxxxxxxxxxxxxxxxxxxxx
"Charles Schuler" <charleschuler@xxxxxxxxxxx> wrote in message
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"ghostwriter" <ghostwriter25@xxxxxxxxxxxxxxxx> wrote in message
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> Here is the basics, I have a heating coil that I think has a half-wave
> rectifier in front of it (I am still waiting for the sales guy to call
> back). I get about 20Volts AC when measuring the hot wire to ground,
> 0.8Volts AC when I measure the COLD wire to ground and 19.2Volts
> between the hot and cold wires.
>
> DC voltage osillates between 1.2 and 1.8 volts. So whatever it is it
> inst straight AC.
>
> I want to be able to calculate the wattage that the system is running
> at, any help appreciated. The circuit havs 4.2 Ohemns of resistance.

I'd guess 100 watts.

How did you guess that, on the DC or AC





It doesn't matter. He squared the 20 volts and devided by 4 (rounded). P=E^2/R
If the 4.2 Ohms was operating resistance then I agree with this "guess"

Tom

.

Relevant Pages

  • Strange voltage readings=Half-Wave Rectifier?
    ... rectifier in front of it (I am still waiting for the sales guy to call ... 0.8Volts AC when I measure the COLD wire to ground and 19.2Volts ...
    (sci.electronics.basics)
  • Re: Strange voltage readings=Half-Wave Rectifier?
    ... 0.8Volts AC when I measure the COLD wire to ground and 19.2Volts ... I'd guess 100 watts. ... thinks he has a rectifier, well that implies he is expecting a DC output. ... He squared the 20 volts and devided by 4. ...
    (sci.electronics.basics)
  • Re: Strange voltage readings=Half-Wave Rectifier?
    ... rectifier in front of it (I am still waiting for the sales guy to call ... I get about 20Volts AC when measuring the hot wire to ground, ... 0.8Volts AC when I measure the COLD wire to ground and 19.2Volts ... Professional Circuit Designer ...
    (sci.electronics.basics)
  • Re: Strange voltage readings=Half-Wave Rectifier?
    ... I get about 20Volts AC when measuring the hot wire to ground, ... 0.8Volts AC when I measure the COLD wire to ground and 19.2Volts ... If that is your output of what you think is the rectifier, ...
    (sci.electronics.basics)