ESP Cinnamon 3 Band EQ for Bass
- Ichabod_Crane
- Resistor Ronker
Bump!
I'm looking for something about this ESP bass preamp, too.
I just found this manual: https://espguitars.co.jp/guitarparts/wp ... Manual.pdf
I'm looking for something about this ESP bass preamp, too.
I just found this manual: https://espguitars.co.jp/guitarparts/wp ... Manual.pdf
- darmstat
- Breadboard Brother
I have a esp cinnamon 3 band eq and I am trying to trace it. Here is the information I have. Can someone look over my schematic and see if it is correct or will work. Thank you
- Ichabod_Crane
- Resistor Ronker
Good job. I'm going to see it better later.
- The G
- Grease Monkey
This is what I could make sense of:
The 3rd op amp is most likely a single low-power op amp and its pinout should be the same as TL071. I named the double potentiometers' sections as "top" and "bottom", "top" being the closest section to the shaft.
Unfortunately, both the schematic and the wiring diagram are truncated. Also, I'm not sure about "passive treble", "B1", "B2" and "trimmer". Could you post an image of the gain trimmer?
Please let me know how close am I to the real thing, so I'll be able to draw a schematic.
The 3rd op amp is most likely a single low-power op amp and its pinout should be the same as TL071. I named the double potentiometers' sections as "top" and "bottom", "top" being the closest section to the shaft.
Unfortunately, both the schematic and the wiring diagram are truncated. Also, I'm not sure about "passive treble", "B1", "B2" and "trimmer". Could you post an image of the gain trimmer?
Please let me know how close am I to the real thing, so I'll be able to draw a schematic.
- darmstat
- Breadboard Brother
- The G
- Grease Monkey
The schematic appears to include some questionable circuit choices. The one I like the least is biasing IC1B through no less than two resistors and two potentiometers
LATER EDIT: I forgot to put a +9V wire on the layout. You most likely figured it out, the red is +9V, green is Vref and black is GND.
LATER EDIT: I forgot to put a +9V wire on the layout. You most likely figured it out, the red is +9V, green is Vref and black is GND.
- george giblet
- Resistor Ronker
There's a little weirdness here and there.
I'm fairly certain the mid control has an error:
C9 should connect between IC2A pin 2 and the Mid pot pin 2 (wiper)
R13 should connect from IC1B pin 7 (where it already is connecting) to IC2A pin 2
If you search midrange control you should find many examples of the pattern. It is a very common midrange circuit.
Even the ratio of the capacitors C10/C9 is fairly typical.
(The input side of the Treble control only works with a passive pickup.)
I'm fairly certain the mid control has an error:
C9 should connect between IC2A pin 2 and the Mid pot pin 2 (wiper)
R13 should connect from IC1B pin 7 (where it already is connecting) to IC2A pin 2
If you search midrange control you should find many examples of the pattern. It is a very common midrange circuit.
Even the ratio of the capacitors C10/C9 is fairly typical.
(The input side of the Treble control only works with a passive pickup.)