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Re: Experimental Help - Terry?



Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>

I have used many hot wire bolometers,but I dont remenber ever seeing any
that would stand up to a TC. I beleave you would have to make your own to
take the strain.
  Robert  H

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Sat, 23 Feb 2002 18:26:41 -0700
> To: tesla-at-pupman-dot-com
> Subject: Re: Experimental Help  - Terry?
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Sat, 23 Feb 2002 18:32:37 -0700
> 
> Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <evp-at-pacbell-dot-net>
> 
> Tesla list wrote:
>> 
>> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <Goinbonkers-at-aol-dot-com>
>> 
>> The hot wire sensor is one commom way to measure RF power.  I have some
>> literature on it.  I'll try to dig it up.
>> Mike
> 
> An easy and practical way to measure current, but to measure power
> you'd either have to "match" the impedance of the hot wire to that of
> the coil, or else know enough about the voltage to guess at the
> volt-ampere product and speculate on how much of it was resistive.
> Power meters based on thermal detectors are quite commonly used in
> measurement of RF power, but only when the circuit impedance is well
> defined.  Some dump all of the power into the resistor, and some high
> frequency ones sample part of the power with a directional coupler.
> Can't imagine meeting any of these conditions with a TC.
> 
> Ed
> 
> 
>