Feeler - Neumann OEV EQ

[ForthMonkey]

It's standart and mastering eq based Neumann OEV.

There are some differences between OVE-RQ and original unit.

-Single mid band separeted to two mid bands.
-No inductor for mids.
-Elec. balanced in&out.

I finished first unit and working well!Now time to racking.I used potentiometers as standard edition.You can build it as stepped gain.I will add resistors values,bom and schematic...

Now i have 8 boards to sale.Check Black Market.

WORK

Loaded all components.And time to add switches.It's low freq switch.I decided to use pinheader for connections but soldering pins are really hard!And i found better idea!I soldered wire and now those are solid as pin!So i can directly put wire to sockets.

HPF:OFF-30-50-80 Hz
LPF:OFF-10-15-18 kHz
Low Band:40-80-100 Hz
Low Mid Band:125-250-500-700-1000 Hz
High Mid Band:1400-2000-2800-4000-5600 Hz
High Band:7-10-14 kHz

 

[shot]

Neumann OA10
http://groupdiy.com/index.php?topic=34105.0

 

[analogguru]

If you mean the small black ones they appear to be MC1456 (obviosly identical to the N5556T, "N" probably stands for Neumann):

http://www.alldatasheet.com/datasheet-pdf/pdf/128953/MOTOROLA/MC1456.html

 

[ForthMonkey]

UPDATED!

 

[ForthMonkey]

NEWS!

 

[shot]

Hey ForthMonkey!

It's sometimes really hard to track changes you make in the first post.
Could you write a new post also whenever you update your first post and write down what is updated.

And keep up the good work!
I hope you'll release pcb designs some day in pdf for self etching!!


Luka

 

[ForthMonkey]

Updated first post!

 

[home_listening]

Has this thread lost a whole bunch of posts?

I also couldn't find any info about this project on your website. Anyway, suffice to say I'm very interested in some boards.

 

[ForthMonkey]

Designing is done!Waiting for boards.Check first post.

 

[ForthMonkey]

Boards are ready! Now time to build it!

 

[ForthMonkey]

Updated!

(Can someone move this thread to "Filters/Equalizers")

 

[ForthMonkey]

Added some photos to first post.

Now waiting for mid band switches!

 

[ForthMonkey]

Updated!

 

[ForthMonkey]

I have 7 boards for sale.

 

[ip_dalie]

Hi. I know its an old thread, but I plan to build this EQ, does anyone still have the project file?
What are the pots value? Thank you.
- Ipin