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DrGain
Copper Member
USA
3 Posts |
 Posted - 06/14/2008 : 19:56:42
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I have a OD-1 that I bought new back in the the late 80's.
Does anyone have a mod to improve signal quality when the pedal is in bypass mode???
Thank You..... |
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zentropa
Gold Member
USA
837 Posts |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 06/15/2008 : 14:25:18
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The SD-1 bleed fix that Zentropa and I worked out should work fine with an OD-1.
R16: 33k -> 10k
R17: 33k -> 10k
C9: 47uF -> 100uf + 1uf ceramic in parallel
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leonard d rock
Silver Member
Philippines
301 Posts |
Posted - 06/24/2008 : 06:48:39
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hi guys. found this on another forum. what do you guys think? its actually for the sd-1 but as i understand, the sd-1 and the od-1 are the same.
"A mod I can highly recommend for the SD-1 is the removal of capacitor C6 (.01uf). Removing this cap will restore a bit of the highs that C6 rolls off resulting in more natural guitar tone getting thru to your amp. To get a little more low end from the SD-1 replace C3 (.047uf) with a 0.1uf cap."
if it can be done, can somebody can point out the equivalent location of c3 in the od-1? i'd like to try it. thanks
mabuhay!
LDR |
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RonNovy
Copper Member
USA
24 Posts |
Posted - 06/24/2008 : 23:00:07
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I think its the one I circled here in red...
Another mode that I heard of is if you swap the positions of the resister and cap I circled in blue... Can't say much for these as I haven't done these myself... |
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ChristoMephisto
Platinum Member
Canada
1288 Posts |
Posted - 06/25/2008 : 00:14:13
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Swapping out the OD1's C3 cap to .1 will rid it of some of the midhump and give you back some bass. Technical mumbo jumbo: 720Hz to 338Hz
C6 in both OD1 & SD1 are a bandpass of sorts. Removing them will let more highs through, like taking a blanket out of your pedal. The same is found in the Tube screamers too.
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leonard d rock
Silver Member
Philippines
301 Posts |
Posted - 06/25/2008 : 06:05:33
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thanks guys! thanks for the warning, zentropa.  i'll try the c3 part only this weekend, just wanted to add a little bass to the pedal. i originally planned in an old post to add a tone control but most guys here said not to.
mabuhay!
LDR |
Edited by - leonard d rock on 06/25/2008 07:01:02 |
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zentropa
Gold Member
USA
837 Posts |
Posted - 06/25/2008 : 06:08:54
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LDR:
i'd be wary of removing C6 on the OD-1 since there's no tone knob to roll back with...
it can get quite brittle/trebly. if you think of recordings where you can tell the guy is using a reissue tube screamer through a jazz chorus... you'll know what i'm talking about.
you can try lowering the value though to roll off less treble but open might be a bit harsh.
i do like the C3 replacement, but you lose a little punch with it while gaining low end. |
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zentropa
Gold Member
USA
837 Posts |
Posted - 06/25/2008 : 07:58:49
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you can futz w/ C6 if you want.
i tried a bunch of diff values (enough to melt the pads off the board after 12+ component swaps) and found results varied depending upon the sound you want.
if you want something more along the lines of a compressed high gain tube amp type drive (mesa, jcm 900, 5150, etc.) you can increase the value (e.g. 0.047, 0.1, etc.). if you want to let more highs through without letting it get overly bright, 220pf, etc.
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leonard d rock
Silver Member
Philippines
301 Posts |
Posted - 06/25/2008 : 08:43:45
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i just need a little bass on the od sound. i could put an eq after the od to tailor the sound more but i will run out of pedal board space. i could get the high gain sound by using the od-1 to push my sem ds-1 imo, or get more distorted sound by letting it push the hm-2. i try to keep the mods minimum on the od as its my oldest and only mij pedal.
thanks,
LDR
PS. a little off-topic: somebody from another forum posted using mosfets as clippers in an od but didn't provide the details , parts etc. kinda selfish, unlike here in BAF where everybody shares the details (unless its patented).
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leonard d rock
Silver Member
Philippines
301 Posts |
Posted - 06/26/2008 : 01:26:00
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hello! tried the mod last night by changing c3 to 1uf. i like the results, just the right bass and a little less mids . kind of like a tubescreamer with the bass boosted. i didn't mess with c6 tho.
LDR |
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Topic |
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Boss OD-1 Mods
