GC Preamp Suggestions

[carlosfm]

Originally posted by motherone
Well, they stick 4 of them on per channel (left/right/ground) and go with that. But for a preamp, shouldn't 100ma be plenty? Plus that buffer has some pretty great specs.. It's just food for thought.

I would avoid to parallel buffers.
Yes, for a pre 100ma is plenty.

Originally posted by motherone
I agree that the THS4082 is impressive as well. They keep putting stuff out faster than people can update/design around.. At least in the DIY community

I edited my post, either the 4082 and the 4062 are very good choices, sound good, and that's what I've been using to change those junk they put on the headphone outputs on CDPs, etc.

[motherone]

Originally posted by carlosfm


I would avoid to parallel buffers.
Yes, for a pre 100ma is plenty.

Yup.. At this point, the "latest" designs are basically using discrete diamond buffers or class-a output stage with an opamp for gain. At some point, it will probably return to being all-discrete designs

Originally posted by carlosfm

I edited my post, either the 4082 and the 4062 are very good choices, sound good, and that's what I've been using to change those junk they put on the headphone outputs on CDPs, etc.

Yes, but with their specs, they're probably not drop-in replacements for standard opamps without careful considerations on bypassing (gasp! ) and HF performance.

Anyhow, my suggestion was mainly so you could build a nice pre using some other IC based buffers that may offer superior performance to the BUF634. Not to say it's a bad chip, it's just that one of those Intersils might be better at this application.

[carlosfm]

Originally posted by motherone
Yes, but with their specs, they're probably not drop-in replacements for standard opamps without careful considerations on bypassing (gasp! ) and HF performance.

Of course, man.
I never just drop-in an op-amp...

[steenoe]

Is anyone interested in this design?

I might be!
Then again, I could just etch my own The design is pretty interesting, as the BUF is exspendable in most systems.

Why bother to use a buffer when it only has 100ma output current?

Excactly right! Why bother with an extra component in the signal path, when it is not needed??

Steen

[n00beR]

Has anyone done any fully discreet designs, I would most certainly be interested in one of those

* beavers away in eagle! "oooooh this thing only has three legs" *

[Russ White]

I posted my latest design in a new thread here:

freebird

Since it focuses on a non-buffered solution.

Cheers!