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Curious about the I.R.E. Standard Dummy Antenna
Brian wrote: The results are he http://users.tns.net/~bb/dummy.htm Nice charts, thanks for doing those. So I think the network is intended to be 400 ohms resistive at SW and at BC behave as a 100-foot wire would. Pretty much what I said initially. A uniform high impedance. As others pointed out the output attenuator of most "service" grade signal generators at the time was all over the place. What I find amazing is that what we can do with Spice in a few minutes was painstakingly done by hand until the they got the results they desired. Then published as a "cook book" standard for others to use. The bottom line was that you could introduce a signal into the receiver under test without undue de-tuning of the tuned circuits. Jeff -- RESTRICTED AREA. Anyone intruding shall immediately become subject to the jurisdiction of military law. Intruders will be subject to lethal force, without warning, and on sight. USE OF DEADLY FORCE IS AUTHORIZED under the Internal Security Act of 1950. |
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