On the webpage
- posted
13 years ago
On the webpage
From what I read, I guess:
OTOH, I would be glad to find a reference on how to accurately derive the proposed equivalent circuit of the diode detector at low signal levels.
Pere
Ya, that's what it looks like to me, I sent him an email, but it looks like he is not responding to any, his store is closed also, at least for now.
Here's a bunch of information about diode detectors in crystal radios. I think the first one will answer your question, but Ben Tongue has great info too.
Ben's index page;
Thanks, MikeK
I received a reply to my question from the webpage author.
"In the formule Rp=2.pi.f.L.Q , I use the Q of the coil in the right-side part of circuit diagram 2. This Q is halve the value of the coil Q in the left-side part of circuit diagram 2.
I consider the right side part of diagram 2 to be a new unloaded circuit, with it own unloaded Q. With unloaded I mean here "not loaded with diode or loudspeaker".
Maybe one might say; it's not unloaded because the antenne is connected" But as you see in circuit diagram 2, in the right side part, there is no antenne anymore. It's just a new LC circuit with it's own Q value, wich we are gonna load with diode and speaker.
The calculated value of Rp is the value which the diode sees, in the situation with the antenna connected"
Thanks! I have also found that the Agilent datasheets provide a lot of info, with some equivalent models in close agreement with your links'.
Pere
Hi Pere, Found this page, has a lot of info, some is a rehash of Ben's info but there is a lot here.
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