Originally posted by DrStiffler
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I must admit some of that goes over my head at the moment. I am unsure of what you are referring to "3db"?
BW I assume is short for bandwidth, and "Q" I have come across before.
But what I can glean from the above is that "any" combination of parts could work within reason, as long as the parameters compliment each other.
I hadnt considered before that the Exciter develops more than one frequency? Am I understanding you correctly when you say that "many of the frequencies it develops.." you are saying that it develops multiple frequencies at the same time, or does it simply mean many of the frequencies one can tune through via adjustments to its configuration?
Reading that last part back I realize that it isnt too clear what I am asking. Put simply, does the SEC output/develop multiple frequencies/harmonics that all occur at the same time or state of tune? Or when tuned correctly does it oscillate at a specific fixed frequency? Sorry for what is probably simple questions, I love building it, but Id love to understand it more.
@ Lid. Interesting results with the tuneable capacitor. Id imagine that if it was out of a radio or such its in the 5-50pF range. Just goes to show how little is needed to detune it I guess. Im interested in why connecting it to your "sink" or copper pipe doesnt have similar results? Wouldnt any metallic object add capacitance to the circuit?
@ all. I finally found some "condiment" cups for my towers here in Australia.
I tried to match them as closely as possible. Sorry if I missed it before, but does someone have measurements of the Walmart ones? I assume they are stainless?
A pic of mine below, aluminum pudding dishes. Sourced from a commercial catering shop. The bottom diameter is 45mm and the top is 65mm. It stands 55mm high. They had some other sizes there, these ones are the smallest. My only way to gauge them so far has been from sight, I approximated them from Dr Stifflers photo on the Scribd doc, the one where I can only assume its his hand holding one of the cups. Of course my gauging the cups this way relies on the assumption that the good Dr doesnt have tiny/huge thumbs!
Regards
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