They're brand new, unused, from Digi-Key. Anyone who experiments with OP-amps... they're yours. I have four of them with matching sockets. Free to whoever posts the best use.

Only caveat: You must eventually show the head-fi board what you do with them. One photo of your circuit will do. We better not see a picture of them rolled up on the shelf!

I'd love to show you what I'd use them for!

Currently building a 47 in translucent blue box, I'll plop them in and document the whole mess with a pdf like my lil blue amp.

ok,
erix

Gee... that was quick! Sure thing... email me your address and off they go.

BTW, what is a 47?

Thanx Nick!

I'll PM you directly.

The 47 is something Apheared came up with. Its a second opamp in the feedback loop of the first for more current, similar to using a buffer. You can read more about it here.

Here's my amp and the pdf of it:
erix_cmoy

Second time I've posted this but my ISP changed Saturday (@home R.I.P.).

ok,
erix

Will you use all 4? 2134's? The 47 should only use 2 of them, and if you would be kind and share the wealth I would apreciate it But I will totaly understand if you don't. If you share I will most defenitaly post picuters. Thank You
-cp

Here are a few images and a pdf detailing the construction of an amp I made with these chips!







The amp is a 47, a Cmoy variant by Apheared. It uses Wima coupling and bypass caps, RN60 resistors, and big 'ol powersupply caps (currently 3300uF/16V) to make up for the inadequacies of the TLE2426. It runs off of a wall 12V wall wart - no provision for batteries.

It drives Grado's in a large way. It was a little thin in bass with 220uF power supply caps hence the switch to the big 3300uF's. It now sounds quite good but I think there is more to be had by losing the TLE2426 and replacing it with BUF634-derived virtual ground.

The link below is a two-page font-intensive layout/wiring diagram for it.

erix_47.pdf

ok,
erix

Sexy amp.

Say, that's a snappy looking amp! The volume knob looks familiar though. Could it be an extra from an errant Foreplay preamp kit?

erix
Nice job! If I read the schematic right you have a gain of 57.5/47.5. Is that correct? Did you have any stability problems?
TIA
crk