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leonard d rock
Silver Member
Philippines
301 Posts |
 Posted - 12/21/2008 : 02:46:38
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hello all,
is there a boss od that is symmetric instead of assymetrical clipping? i know an sd-1 can be modded to a symmetrical clip but is there any stock one (which sounds like a tubescreamer if i may say so in this forum)? i want as much as possible to keep my main board pure BOSS.thanks!
ldr |
Edited by - leonard d rock on 12/21/2008 06:45:34 |
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zentropa
Gold Member
USA
837 Posts |
Posted - 12/21/2008 : 08:47:44
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all of the overdrives that are similar in tone to a tubescreamer are asymmetrical.
it's really easy to make an SD-1 symmetrical if you want it to be that way. |
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Tele_Man
Bronze Member
USA
86 Posts |
Posted - 12/21/2008 : 21:40:57
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| Can someone explain the difference between symmetrical and asymetriccal clipping, or refer me an explanation online somewhere? I want to have a better understanding of what this thread is all about (and Dist./OD pedals in general.) |
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Disco Stu
Silver Member
USA
303 Posts |
Posted - 12/22/2008 : 02:55:00
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Hi Leonard --
I've got a Boss SD-1 that's been modified by analogman to sound more like a Tubescreamer. It has the push/pull knob in place of the left potentiometer so you can switch between asymmetrical and symmetrical clipping. This gives it lots more tones you can choose from.
Some here have expressed their dislike of this particular pedal mod, but I like mine a lot, the only drawback being it is pretty noisy compared to stock SD-1 pedals.
I guess Boss has a patent on asymmetrical clipping. I believe if you search around Analogman's site he spells out the differences in the two waveforms.
-- Disco Stu |
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leonard d rock
Silver Member
Philippines
301 Posts |
Posted - 12/22/2008 : 04:12:05
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hi guys,
zentropa, perhaps my wording was a little different, but my understanding is (according to the analogman site) all ts pedals are symmetrical, not assymetrical. i have a ts-5 and it really sounds different to the od-1 and sd-1 which are assymetrical. what i was looking for was a stock boss od with symmetrical clipping but if there is none, i'll have to mod an sd-1.
disco stu, i would love to have that kind of pedal with switchable clipping modes. ill do a search for a mod like this even if i have to use a small toggle switch as pushpull are kinda hard to find here.
teleman, try these links:
http://www.analogman.com/
http://www.bossarea.com/forum/topic.asp?TOPIC_ID=2849
http://diystompboxes.com/wiki/index.php?title=Simplemods
HAPPY HOLIDAYS EVERYBODY!
LDR
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zentropa
Gold Member
USA
837 Posts |
Posted - 12/22/2008 : 04:30:43
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what i meant is that, all boss overdrives in the same ballpark of tone and gain potential to a tubescreamer are asymmetrical clipping.
all tubescreamers are symmetrical. |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 12/22/2008 : 04:52:21
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LDR - find D6 on the board of your SD-1 and run a wire from either side of D6 to a switch. When the switch is closed, the pedal will be symmetrical, switch is open it will be asymmetrical.
Simple as that... |
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leonard d rock
Silver Member
Philippines
301 Posts |
Posted - 12/22/2008 : 05:24:07
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hello again,
ok zentropa, i get it now .
thanks laurie, that is great, i'll just have to drill for the switch.
ldr |
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ChristoMephisto
Platinum Member
Canada
1288 Posts |
Posted - 12/22/2008 : 13:12:12
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quote:
Originally posted by zentropa
what i meant is that, all boss overdrives in the same ballpark of tone and gain potential to a tubescreamer are asymmetrical clipping.
The SD1 has twice the gain as the TS due to the 1M pot/33k vs the 500K/10k setup.
Lauries, like your idea about shunting D6 instead of lifting and jumpering.
One could also ADD a second diode to D4 for symmetrical clipping |
Edited by - ChristoMephisto on 12/22/2008 13:18:30 |
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DarrinPA
Silver Member
USA
221 Posts |
Posted - 12/22/2008 : 18:46:25
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quote:
Originally posted by Laurie
LDR - find D6 on the board of your SD-1 and run a wire from either side of D6 to a switch. When the switch is closed, the pedal will be symmetrical, switch is open it will be asymmetrical.
Simple as that...
Really? That is really cool to know. Thank you. I think I know what I'm modding next. |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 12/22/2008 : 18:50:29
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Yep. It is D5 and D6 in series that form the "asymmetric side" of the clipping. In the stock SD-1 it is D4 in one direction and D5+D6 in the other direction (asymmetric).
Using a switch to short out D6 will leave D5 in one direction and D4 in the other (symmetric).
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Edited by - Laurie on 12/22/2008 18:51:50 |
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August West
Bronze Member
USA
137 Posts |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 12/23/2008 : 15:46:21
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quote:
Originally posted by August West
Tele Man - see this link for a quick description of symetrical vs. asymetrical clipping and what this means in terms of tone.
http://www.instructables.com/id/SHSGOTJFD80OUV6/
Great link! Thanks! |
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leonard d rock
Silver Member
Philippines
301 Posts |
Posted - 12/25/2008 : 03:28:57
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since i wanted the stock sound of the sd-1, i modded the od-1 into symmetrical clipping by adding another diode in series to d5, instead of removing d6 or d7. i experimented by removing d7 and the result was a loud, midrange honky hard tone. i didnt like it so i returned it and added a diode to d5 balance it out. the sound is round, strong but smooth like the ts-5 tone i was looking for. it makes my peavey tele chime when used as a clean boost and sing sweetly when overdriving the sd-1 or using it as a stand alone drive pedal. so my board is still pure BOSS.
ldr
end credits.
thanks to christomephisto for suggesting to add a diode |
Edited by - leonard d rock on 12/25/2008 06:07:02 |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 12/25/2008 : 04:37:12
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| THanks for the update!~ |
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ChristoMephisto
Platinum Member
Canada
1288 Posts |
Posted - 12/25/2008 : 14:07:53
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Right on, glad you found a sound you liked.
Have to try out the clipping combo in my OD1 clone |
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Topic |
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BOSS OD with symmetrical clipping?
