>
>Hi Guys,
>
> I was wondering if anyone out there knows if the Bird 43 wattmeter and
>Coaxial Dynamics peak reading wattmeter work with 75 ohm coax or just 50
>ohm?
>
>If they don't work properly with 75 ohm coax, is there anyway to "offset"
>the mismatch to get more accurate readings?
>
>Are there any wattmeters that can work properly with both 50 & 75 ohm coax?
>
// I arrive at PEP by measuring peak RF voltage across the load R with a
freshly calibrated oscilloscope and a x100 probe. For a sinewave,
P-peak=(E-peak^2)/R and PEP=P-peak/2. This method works with any
resistance load.
cheers, Bob
- R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures.
end
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