inspired by analag´s post (this beautiful forum :roll: ) I put myself to work in a mix of two project that were posted time ago.
http://www.groupdiy.com/index.php?topic=20972&highlight=amek+2500+filters
and
http://www.groupdiy.com/index.php?topic=4455&highlight=amek
Features:
- Balanced input and output using INA134, DRV134, SSM2141, SSM2142 , That 1250, That1646 or equivalents.
- 4 band full parametric amek 2500 EQ:
- each band has Q, frequency and gain controls.
- Shelf/bell option for HF and LF bands(optional).
- NEMEK option, use dual linear pots instead the dual rev logs!
- Eq bypass switch(optional).
- Harrison filters(optional):
- Second order low pass filter. (-3db at 170 Hz to 19kHz)
- Second order high pass filter. (-3db at 24Hz to 3.3kHz)
- Filters bypass switch (optional).
I don´t have a lot of experience designing so I want to hear opinions of the schematic. Mainly about impendances and stage coupling between the circuits of the amek, harrison and IN/OUT.
at this moment the project is:
- A single layer pcb of 30x10cm (maybe 2 boards of 15x10), harrison filter pots and switches out of the pcb.
- 5 pages documentation file(options, description and partlist).
Click here for full size.
http://www.twin-x.com/groupdiy/albums/userpics/schematicamek2500.gif
The pcb board is 90% finished but I want to be sure of the schematic to release it.
greetings
Rafael
http://www.groupdiy.com/index.php?topic=20972&highlight=amek+2500+filters
and
http://www.groupdiy.com/index.php?topic=4455&highlight=amek
Features:
- Balanced input and output using INA134, DRV134, SSM2141, SSM2142 , That 1250, That1646 or equivalents.
- 4 band full parametric amek 2500 EQ:
- each band has Q, frequency and gain controls.
- Shelf/bell option for HF and LF bands(optional).
- NEMEK option, use dual linear pots instead the dual rev logs!
- Eq bypass switch(optional).
- Harrison filters(optional):
- Second order low pass filter. (-3db at 170 Hz to 19kHz)
- Second order high pass filter. (-3db at 24Hz to 3.3kHz)
- Filters bypass switch (optional).
I don´t have a lot of experience designing so I want to hear opinions of the schematic. Mainly about impendances and stage coupling between the circuits of the amek, harrison and IN/OUT.
at this moment the project is:
- A single layer pcb of 30x10cm (maybe 2 boards of 15x10), harrison filter pots and switches out of the pcb.
- 5 pages documentation file(options, description and partlist).
Click here for full size.
http://www.twin-x.com/groupdiy/albums/userpics/schematicamek2500.gif
The pcb board is 90% finished but I want to be sure of the schematic to release it.
greetings
Rafael