MIMF preamp questions

[Mikheil Tsitsishvili]

Look here:
http://www.mimf.com/old-lib/mimf_preamp.pdf
This has all the schematics and board designs. There are several versions with minor differences.

Hi,

Thanks a lot! I am searching for such a circuits for almost 2-3 months and I have never seen such a variety of the schematics with all the details not only available but also given everything in one file, superb and very helpful!!!
But, let me ask on these schematics, are they designed and published for the purpose of a general discussing and as an examples of how the preamp should be done .... ? or, these are real preamplifiers designed, built and experienced in the different situations and use .... ?
If they are built and offering a real quality on-stage, then I really would like to start working on them.
I appreciate any type of information, audio and/or visual samples etc..... on these schematics. Thank you!

[Rodger Knox]

Yes, these are actual working designs, and most of them have been sucessfully prototyped. Look on the first page, there's a photo of two of the preamps I built from the schematic for a mic and piezo with a blend and volume control.
edit: This was originally designed to be a simple blending preamp to blend a piezo and a mic, with only a blend control. The volume control was added later, and the other tone controls were added even later. I've built several versions of the piezo/mic (one for 30mm pots, one for 60mm) and have been very satisfied with the preamp. I've had some trouble with the mics, the ones I've used(similiar to the original spec) have been VERY difficult to solder the leads, and I'm no slouch at soldering.

[Mikheil Tsitsishvili]

Yes, these are actual working designs, and most of them have been sucessfully prototyped. Look on the first page, there's a photo of two of the preamps I built from the schematic for a mic and piezo with a blend and volume control.
edit: This was originally designed to be a simple blending preamp to blend a piezo and a mic, with only a blend control. The volume control was added later, and the other tone controls were added even later. I've built several versions of the piezo/mic (one for 30mm pots, one for 60mm) and have been very satisfied with the preamp. I've had some trouble with the mics, the ones I've used(similiar to the original spec) have been VERY difficult to solder the leads, and I'm no slouch at soldering.

Thanks! Well, are there any measurements of the preamp's frequency range, noise level etc available ? it would be just great to know more in figures......

[Rodger Knox]

Sorry, but I don't know much about electronics. There's some discussion in the old library from the original design, it may have some information.
I can read a schematic and translate that into a board design, but I don't know anything about circuit design.

[Mikheil Tsitsishvili]

OK, thanks!