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Re: When does a better mouse trap turn distasteful carboncopy cloning?

Konnichiwa,

> With all the internal creativity and wonderfully unique
> circuitry aspects, why stop there and "punt" the chassis design?

Well. Looking at things simply, there are a lot of reasons why most airplanes are shaped like airplanes. When you start mashining from solid it is much easier to do rectangualr shapes and the size of the case gets determined by what it holds. So there is a lot of form follows function.

I'm sure Peter thought first about doing it differently, but when production engineering comes into this and you have a given set of tools things have a way of turing out similar. There are reasons why Cars tend to have four wheels too.

So, what am I saying? I'm saying that IF you make an Amp that is dual mono (this including the "docking together" is not unique to the gaincard nor was the gaincard the first unit to do this) and has a volume control and uses a compact electronic circuit and has an external PSU (again, the gaincard was not the first Amp to have an external PSU) you end up with something that looks a lot like the Gaincard if you let form follow function.

And let's just say if Peter would have made his Amp round and small someone would have accused him of copying Musical Fidelities X-Series. And if he made still another form sureley someone else would have already made it.

What I'd personally suggest to peter to make greater visual difference is to round off the corners but then this would look like something from that Canadian guys (Moon?).

> Near as I can tell, YOU should get the credit for this clone T.

Well, Peter started with the circuit I suggested and placed in the public domain (as did Joe Rasmussen with his JLtI BTW and probably a few 100 DIY'ers by now).

He then proceeded to make circuit changes (mostly subtractive - removing some of the "belt & braces" features I had added to make the likelyhood of working amp larger for unskilled constructors) and did a long and extensive series of listening tests to come up with his component choice (and I'm sure I'd have choosen different components in the same tests).

So, if someone wishes to mention me as the populariser of the idea to use power Op-Amp's inverted I must plead guilty as charged. I have however not "invented" this and Peter has put at least 100's of Hours of development into the Amplifier that has now become a commercial product. So it is very much HIS design even if there where direct and indirect influences upon his choice of circuit, Amplifier Chip, physical layout etc....

BTW, if you look inside the Gaincard, it looks VERY different from Peters internal layout too.

Sayonara

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