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Gainclone parts confusion...Thorsten??

I'm noticing many different stances on the values/types of parts used within the amp section of the gainclone.

1) I noticed in the beginning of Thorsten's posts that he suggested 4.7uF blackgate non-polarized. Now it seems like 2.2uF mylar? What about voltage rating? Not quite sure what's the case here.

2) Bypassing the resistor (220K?) connected to the positive input terminal of the opamp is a .1uF cap? Of what type? Does this value also vary? What about voltage rating?

3) Concerning the zobel: Is everyone calculating different values for their zobel network? I see a schematic on the gainclone discussion board that has a zobel network with values of 1 ohm and .22uF...from the very very little I know about zobels from attempting to understand posts here on them, shouldn't the resistor value be approximately 1.25 times the DCR of the speaker? Am I missing something here? surely the person doesn't have a .8 ohm speaker. I'm totally clueless on the zobel aspect here. Also, was a concensus reached on what type of cap to use for the zobel? Going polypro. and compromising signal length or using smaller sized caps? Again, voltage rating would be appreciated.

Please do not refer me generally to the gainclone discussion board, I've already been there and read every post. Now if you are going to direct me to a specific post where I may have missed some key info, that's fine. I really would like to get the ball rolling on this project but can't exactly do that without knowing the parts necessary to order. I have read cfraser's gainclone page, but wanted to know if there's any disagreement with the suggested parts listed.

I greatly appreciate it!

Andy


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Topic - Gainclone parts confusion...Thorsten?? - Andy B 14:16:32 07/24/01 (3)


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