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#17
July 8th 04, 07:05 PM
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Wes wrote,
Message-id: On Wed, 07 Jul 2004 18:34:15 -0400, wrote: |Well here's what I did: I treated it like a peice of coax. I made a |fixture to hold the "feedthru" with semi-rigid coax on one side and a |50 ohm chip resistor on the other. I dropped in a short peice of coax |and cal'ed to that. Then checked VSWR, was about 1.00something. Then I |took out the coax, dropped in a few feedthrus and got VSWRs about 1.04 |- 1.06, which works out to about 53 - 55 ohms or so. | How's that sound? Like you don't know what you're doing. Your DUT is a two-port device. If you really have a network analyzer, why aren't you using it to measure the device as a two port? Is two port theory even being taught in engineering schools these days? 73, Tom Donaly, KA6RUH |
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