Adapting 2405 and 2421 "Equivalent Circuits" (Posts 57 & 58)
Hope I can interject a related question here about the 3145 "equivalent circuits" provided by Giskard for Ian’s 4345 project, without twisting this thread too badly.
I don’t understand much at all about these circuits but am confident I can assemble them. I am working up a variant of a 4345 (triamped, 2245H, 2123H and 2441/2405, crossed over at 250 and 1100Hz). Many thanks to Ian for all his detailed posting on "how to", and all the others that contributed so freely of their time along the way, especially Giskard!
Will the equivalent circuit for the 2421 work for the 2441? I am assuming that since they are both 16 ohms nominal that they will. Secondly, in both the 2405 and 2421 equivalent circuits, there are resistors shown in series with the inductors; are these actual resistors or are they just the resistance values of the inductors?
Many thanks!
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Adapting 2405 and 2421 "Equivalent Circuits" (Posts 57 & 58)
My original equivalent circuit:
Thanks - Now, about the components . . .
Thanks for the insights Rob. I have been trying to get down to the brass tacks of ordering components for these networks. Two concerns arise.
First, Giskard says to use "gangs of resistors" for proper power handling. How do I determine the handling capacity to shoot for ? The 2441 is rated at 150 Watts @ 1KHz, but I would never come close to cranking it that high, so what's a reasonable level? I realize this is a flaky question, but can someone provide a rough guideline?
Then, once that answer is in hand, how do you determine the number and value of resistors to satisfy a given requirement? Let's say the desired power handling capacity is 60 watts, and, as an example, let's take the 15 ohm resistor in Giskard's HF network in post 170. Using 10 watt resistors, I would need six 90 ohm resistors in parallel, correct?
Secondly, I have been researching numerous threads on the forum to learn more about what capacitors to get. What a blackhole topic that is !!! Along the way I have read quite a bit about charge coupled networks being very worth the extra expense. Presuming that would be true in this case, how would these circuits be modified?