RE: Have you done this? (McCormack Phono) - Ecaroh - Tweakers' Asylum

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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

RE: Have you done this? (McCormack Phono)

In Reply to: Have you done this? (McCormack Phono) posted by 1973shovel on October 26, 2007 at 05:47:42:

>> I have not touched the op-amps yet. I bought a pair of the OPA627 modules on the Brown Dog adapter boards, but have yet to try and fit them in. What op-amps did you use? I heard somewhere that the op-amps are only used for the high gain, m/c section. Do you know if there's any truth to that? <<

I had not heard that. Let me know if you learn anything further.

I ended up using 604s and also replacing the dual parts with 2604. I tried the 2134 and its single version, but to my surprise I ended up liking the 604/2604 better. I was also surprised that there seemed to be an improvement with the 2604 over the stock dual part.

These BB op-amps are no more expensive than the ones Steve used to begin with. I felt there was more clout, better dynamics, with the BB chips. That was my one complaint when I first starting listening to the Micro Phono.

I stuck with the BB alternatives because of their easy implementation.

Recently put together, too, a toroid transformer with the help of suggestions from inmate Rob Thomas. The change was less than dramatic, to my ears, but probably worth doing.

Steve.

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Follow Ups Full Thread

Topic - Coupling Cap Value (size matters?) - 1973shovel 05:53:17 10/25/07 (11)

Problem Solved - 1973shovel 08:36:53 10/26/07 (0)

RE: Coupling Cap Value (size matters?) - ChrisVH 08:11:39 10/26/07 (0)

RE: Coupling Cap Value (size matters?) - Ecaroh 23:28:14 10/25/07 (4)

Have you done this? (McCormack Phono) - 1973shovel 05:47:42 10/26/07 (3)

RE: Have you done this? (McCormack Phono) - Ecaroh 14:35:04 10/26/07 (2)

replacing the dual parts with 2604 - 1973shovel 18:05:53 10/28/07 (1)

RE: replacing the dual parts with 2604 - Ecaroh 13:20:44 10/31/07 (0)

Thats up to your ears to decide - Tweekeng 06:26:10 10/25/07 (3)

For better or worse is up to you to decide. - 1973shovel 07:04:55 10/25/07 (2)

RE: For better or worse is up to you to decide. - h_h 08:30:29 10/25/07 (1)

RE: I've got a '77 XLH. - 1973shovel 08:59:37 10/25/07 (0)

Follow Ups

RE: Have you done this? (McCormack Phono) - Ecaroh 14:35:04 10/26/07 (2)

replacing the dual parts with 2604 - 1973shovel 18:05:53 10/28/07 (1)

RE: replacing the dual parts with 2604 - Ecaroh 13:20:44 10/31/07 (0)

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