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#18
May 9th 06, 05:48 AM
posted to rec.radio.amateur.homebrew,sci.electronics.design
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Need further info on network analysis terms...
On 8 May 2006 21:27:03 -0700, "K7ITM" wrote:
And--I had posted something similar about length being important--it was the posting to which you replied asking about if length was important. You really would get more respect if you looked a bit more carefully at the info already posted. It would be a lot better if you would ask specific questions about what was already posted. The specific paragraph from my earlier posting is quite clear about the effects of length being important: "You can make a decent open that's nominally the same electrical length as the load by sawing the center pin off flush with the dielectric, and a short by shorting the pin to the shell. Do it with a tiny disc of copper foil if possible--but in a pinch you can use multiple lengths of wire radially out from the center pin. All these things should have as close to ZERO lead length as possible. At 1GHz, 1 millimeter is a little over 1 degree of phase shift, with air dielectric, and more with Teflon or other dielectric. " I can understand Wes' frustrations. And I your's. Regards, Wes |
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