Found some very high quality op amps

[Transmogrifox]

For you OP AMP IC experimentalists, I just found this device:

TSH24

available from mouser.

It has a GBP 25 MHz
15 V/us slew rate
.003% THD

and here's the biggie:

No phase inversion from saturation.  Therefore it is ideally suited for filters and wahs that may saturate, and an excellent choice as an IC to use in a distortion pedal.

If you can find a dual version (this one is a quad) you can plug it directly into a TS-9

a little spendy, though, but not nearly as bad as the OP27.  The OP270 (dual OP27 type) generally goes for  4 times the price of the TSH24 quad op amp...and the TSH24 is superior to the OP27 on all accounts but noise

OP27  3nV/rootHz
TSH24 14nV/rootHz

But this is such low noise that re-designing your circuit for optimal noise characteristics will have a much greater effect than the opamp.

[ExpAnonColin]

SMTmicroelectronics makes it, they're 1.30 for the quad and 1.10 for the dual.

-Colin

[Paul Marossy]

Wow.  :shock:

That's a large bandwidth. Around how much dinero does one chip go for?

[ExpAnonColin]

http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=344146&e_categoryid=98&e_pcodeid=51123

-Colin

[ExpAnonColin]

Man, this thing makes a 741 look like a toy...

-Colin

[ExpAnonColin]

Since we're on the topic of good op amps (man, I'm overposting in this thread) how about these:
http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=382395&e_categoryid=98&e_pcodeid=51300

Slew rate isn't quite as good, but the bandwidth is better.  The noise is .56uv, which isn't as good, but these are quite a bit cheaper.  Anyone know the 741 noise?

-Colin

[bwanasonic]

I'm planning a mic preamp for my minidisc player, and was going to use the Burr-Brown OPA2134.

( http://focus.ti.com/docs/prod/folders/print/opa2134.html )


TI was nice enough to send me some samples...

Not sure how well it would perform in distortion circuits though - more of a *Hi-Fi* deal.

Kerry M