On Tue, 06 Jul 2004 20:02:28 -0400 wrote:

Thanks for all the responses. There's not much info here. The lab
manager gave me about 10 feedthru caps to verify the impedance. The
"official" looking tag in the bag says "Zo=50+/-10 ohms". That's it.
No freq, no capacitance. For sure they're feedthru caps, built like
you're typical feedthru cap. I figured, for testing purposes, treat it
like a small section of coax.I'm not even sure what freq they want it
checked at. I'll have to get more details.

Sounds to me like they are just feedthrus, not feedthru caps.

I don't think there's any way that a feedthru cap could have a Zo of
50 Ohms (pure resistive.) They are simply not made to pass RF; their
purpose is to serve as a short to RF.

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Jim Adney
Madison, WI 53711 USA
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