9v pedal and 15v eq built in one box posible?

[wormfooduk]

I have an op amp big muff and a parametric eq that i have built and was wondering if its possible to build them into one box with one power supply, ive only done 9v projects so far and have no idea how to make it work. Could i use a voltage regulator? Ive also heard that some people have the big muff running 15v and it sounds good. what changes would i have to make to run it at 15v. I guess with the eq I could change the opamps to low power versions and run at 9v but they would have more noise. I dont know enough about the subject to know whats best. if i can change the eq to 9v i guess i could put it in the big muff circuit where the tone normally connects. 

[petemoore]

I have an op amp big muff and a parametric eq that i have built and was wondering if its possible to build them into one box with one power supply, ive only done 9v projects so far and have no idea how to make it work.
  Circuits can be daisy chained from a power supply.
  Could i use a voltage regulator?
  Yes, the output can be 'totally ripple free.
  Ive also heard that some people have the big muff running 15v and it sounds good. what changes would i have to make to run it at 15v.
  You need a 15vdc power supply and components rated for the voltage they will see [which equates to 25v capacitors for a BMP.
  I guess with the eq I could change the opamps to low power versions and run at 9v but they would have more noise. I dont know enough about the subject to know whats best. if i can change the eq to 9v i guess i could put it in the big muff circuit where the tone normally connects.
  er a...
  Download Duncans Tonestack Calculator. Any of these passive TC's effect can be seen graphically while being adjusted, note that the vertical position of the line equates to the output level at the frequencies, hence if the whole line is in the middle of the graph, the output is lower than if near the top.
  BMP has a lot of output [recovery stage there]...a tonestack can be swapped, search BMP mods etc.
  Eq placed after BMP...if it's a graphic, compare the graph you adjusted for tone to the TSCalculator graphs...see what you think [BMP TS can be viewed and adjusted graphically].
  Perhaps 15v is good, 9v is good, it has clipping so as long as the thresholds are met...never tried it @15v supply.
  Whatever boosts and is recieving a boosted output might benefit from a 'boosted' supply voltage, since the signal swings may well be able to try to get past 9vdc, or come close to the rails and cause distortion, if anything, the eq After the BMP might benefit from 15v...consider to put 'em both on a 12v or 15v [component ratings permitting], using a WW and a regulator...the BMP will distort, boost [a bit more] @15v, provided there are no over-voltaged caps.
  With a regulator it's not a worry, but add 10% component voltage rating [or more] for 'strange power', surges or what have you.

[wormfooduk]

thanks for the reply, so if the components can take over 18v (ish) i should be ok. the opamps in the big muff are rated 18v max and 20v max. 

[petemoore]

thanks for the reply, so if the components can take over 18v (ish) i should be ok. the opamps in the big muff are rated 18v max and 20v max.  

and the electrolytics ?
  18v seems high, pretty dern accomodating is 12v...
  to get 12v regulation, 7812 regulator requires 14+ V input [uses up a couple volts], so the input voltage from the wall wart if it's around 15v [not less than 14.2 for good measure [DMM variances, etc.], should keep the regulator happy and providing 12v.

[Mark Hammer]

Plenty of pedals start with a higher supply voltage, and then regulate that down to other voltages to feed different parts of the circuit.  For instance, anything using the PT2399 will donwregulate to 5v.