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Old September 6th 06, 05:13 AM posted to rec.antiques.radio+phono,rec.radio.amateur.boatanchors,rec.radio.amateur.antenna,rec.radio.amateur.homebrew
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Default 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


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