Author Topic: Increase volume in a boss OD-2: how?  (Read 3393 times)

-frank-

Increase volume in a boss OD-2: how?
« on: June 25, 2007, 02:45:55 PM »
Hi all, I have a OD-2 without remote control... I'd like to increse its volume cause now it is to low  :icon_sad:.... Here you can find schematic:

http://www.freeinfosociety.com/electronics/schemview.php?id=162

Any suggestion? Thank you!!!  :icon_biggrin:

-frank-

Re: Increase volume in a boss OD-2: how?
« Reply #1 on: June 28, 2007, 07:25:15 AM »
Nobody can help me?  :icon_cry:

petemoore

Re: Increase volume in a boss OD-2: how?
« Reply #2 on: June 28, 2007, 10:40:58 AM »
  ok..
  don't exceed the components voltage ratings [see that electrolytics are 16v or higher].
  Run it on 12vdc regulated supply.
  Raise the clipping threshold of the diodes by adding a series diode [where one was: --->l---, have two: --->l--->l---. Try a Ge diode in series with what you have, or other type.
  The other side of the clipping [diodes facing ---l<---l<---] already have two in series = fairly high clipping threshold, I didn't catch the type used/don't know the threshold.
  try one of these two ideas, the diode insertion might be easiest, unless you have a 15vdc WW and a 7812 voltage regulator handy. Measure that the applied voltage is less than component ratings.
  That should raise output 'some', other than that I'm having trouble identifying a gain stage, or how to increase it with a resistance adjustment...all the non source followers show 4k7 source R, and 2k2 drain R...[odd] quite possible I'm reading something backwards or not taking into account the various supply polarities or voltages or transistor orientations...it's a confusing map, I can only make out certain reference points.
Convention creates following, following creates convention.

wampcat1

Re: Increase volume in a boss OD-2: how?
« Reply #3 on: June 28, 2007, 04:02:55 PM »
Hi all, I have a OD-2 without remote control... I'd like to increse its volume cause now it is to low  :icon_sad:.... Here you can find schematic:

http://www.freeinfosociety.com/electronics/schemview.php?id=162

Any suggestion? Thank you!!!  :icon_biggrin:

not sure which channel you are wanting louder. First:
c35: 1uf
change vol pot to a 1meg

dist:
r35: 500k
c27: 2.2uf
r31: add 100uf cap in parallel

od:
r50:  add 100uf cap in parallel
add diode in series to d9 and d10
c34: 2.2uf

Hope that helps! :)

bw



Keep in mind, we are messing with gain, so it may get fuzzier when you turn the gain up now.




Steben

Re: Increase volume in a boss OD-2: how?
« Reply #4 on: April 29, 2015, 12:17:00 PM »
Very old thread,

Yet I am planning to have one in some days.

I stumbled upon something very simple for the TURBO channel = just flip R39 and R32. Instant volume boost!

The OD channel can be modded as any typical OD circuit by adding / changing diodes to get higher treshold.
« Last Edit: April 29, 2015, 12:18:46 PM by Steben »
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