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Dr. Bob
Moderator
Australia
6593 Posts |
 Posted - 03/29/2008 : 13:53:54
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Hi leonard d rock
According to my Motorola data sheets.
The 1N4005 is a SILICON not Germanium 1Amp 600 V PIV diode.
Here is a quick link to some (PDF) data on 1N400x series diodes.
http://www.futurlec.com/Diodes/1N4005.shtml
Hope this helps clear things up.
Regards Dr. Bob |
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leonard d rock
Silver Member
Philippines
301 Posts |
Posted - 03/31/2008 : 07:17:34
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i stand corrected dr. bob. thanks for your help and knowledge as usual. 
i put a led after d5 anode and it became louder but i didn't like the characteristics of the distortion so now its back to just the silicone diode in d4 & d5.
mabuhay! |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 03/31/2008 : 08:56:21
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Hi leonard d rock
Glad to help...
You might still want to download the datasheet, it contains a great deal of info. & specs on the 1N400x series of rectifier diodes.
Good to keep in your Technical library.
Regards Dr. Bob |
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leonard d rock
Silver Member
Philippines
301 Posts |
Posted - 04/01/2008 : 04:26:18
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thanks dr. bob! info like this will come in handy sometime in every modder's days and nights. |
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RickBlacker
Bronze Member
USA
138 Posts |
Posted - 09/17/2009 : 01:32:29
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| Are there instructions on how to do the Keely seeing eye mod for the DS1? |
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Laurie
Double Platinum Member
Canada
4854 Posts |
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moonmarkcus
Silver Member
Nicaragua
224 Posts |
Posted - 10/09/2009 : 17:12:43
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Have you tried changing IC??
Recently I bought a damaged DS1 with Opamp fried and installed a RC4558L (in line package opamp) and it sound, but doesnt like the original, a little bit fuzzy compares to original sound, ( I dont like the sound)
Can someone give me better recomendations of Opamp or MODs in order to obtain a real improvement from original ? I am seeking the surfing with the alien sound |
Edited by - moonmarkcus on 10/09/2009 17:13:33 |
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tunghaichuan
Bronze Member
USA
77 Posts |
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hot tubes
Silver Member
Canada
162 Posts |
Posted - 10/10/2009 : 18:50:00
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quote:
Originally posted by stinkfoot
D4 and D5 are the only clipping diodes in the DS-1 circuit. D6 and D7 are part of the switching circuit, and should not be touched.
Now, D4 and D5 are connected in opposite direction to each other (so one clips the top part of the wave, while the other clips the bottom). When both are the same type, you have symmetric clipping (both clip the same way and at the same point). If you change one for a different type (like the Seeing Eye mod, where one of the diodes are replaced with a 3mm red LED), you get assymmetrical clipping.
Now, different diodes clip in different ways. With a silicon diode (1N4148 or similar) as reference, an LED will clip much later (giving you more volume and less distortion) while a germanium diode will clip much earlier (less volume, more distortion).
You can then experiment with various combinations - the Seeing Eye type clipping works great for when you want to keep the pedal firmly in the "distortion" camp, but still want more volume and clarity. Use a germanium diode instead of an LED (with the stock 1N4148 still in the other spot), and you'll get a much more compressed tone. If you remove one of the diodes completely, you'll get a very asymmetrical clipping as only half the wave will be clipped at all - the other half will be clean, as long as the op-amp stays clean.
I like LEDs for both D4 and D5, for symmetrical late clipping. This turns the DS-1 into a very loud, dynamic pedal with not nearly as much distortion available. Great for boosting an old Marshall or "classic rock" tones, but not so good for high-gain tones on a clean amp.
/Andreas
so far my fav clipping set up for the DS-1 has to be a mix of 2
diodes ,
D4-REMOVE DIODE
D5-1N34A GERMAINIUM & 3MM LED in series
not sure why , but it sounds so good with a few other changes
to the DS-1 . imo .....a very underated pedal .
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leonard d rock
Silver Member
Philippines
301 Posts |
Posted - 10/11/2009 : 02:55:39
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the mod i have on my ds-1 is the longest i have. on the clipping section, i made it assymetrical by adding one more 1n4148 to d4. then on the tone stack, on c12 i changed it with a cap marked 223; on c11 changed to a cap marked 103.
the sound seems more midrangey, almost flat mids now, not the stock midscoop. on the drive pot, at 7 oclock it sounds like an sd-1 on 12 oclock. as you advance the drive pot, more distortion is available up to something almost like the the hm-2. its now a good contrast between the midscooped hm-2 and the lower gain sd-1. all three are on my board. the sd-1 does boosting duties mostly.
ldr |
Edited by - leonard d rock on 10/12/2009 01:40:10 |
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hot tubes
Silver Member
Canada
162 Posts |
Posted - 10/11/2009 : 19:47:11
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i find c3 to be a good place to help tighten up the low end , i
drop it to .033 or even .027 depending on what type of sound i'm
going for .
i find these to be the most useful locations to change etc. IMO !!
c2
c3
c10
c11
c12
r13
r16
r17
d4
d5
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moonmarkcus
Silver Member
Nicaragua
224 Posts |
Posted - 10/12/2009 : 16:38:21
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What about changing IC?
Does anyone know a better option than stock IC Opamp? |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 10/12/2009 : 16:45:13
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quote:
Originally posted by moonmarkcus
What about changing IC?
Does anyone know a better option than stock IC Opamp?
This is from another thread (DeFrag found it IIRC). Worth a look before changing opamps...
http://www.youtube.com/watch?v=bpTv2jAree8
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cctsim
Silver Member
United Kingdom
418 Posts |
Posted - 10/12/2009 : 18:10:40
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quote:
Originally posted by Laurie
quote:
Originally posted by moonmarkcus
What about changing IC?
Does anyone know a better option than stock IC Opamp?
This is from another thread (DeFrag found it IIRC). Worth a look before changing opamps...
http://www.youtube.com/watch?v=bpTv2jAree8
I find this video a bit biased and inconclusive. Funny enough in those videos, the Visual Sound pedals are chosen as the best sounding
by the audience. Nevertheless, this guy is a great manipulator.
If you use a different guitar/pickups/amp setting (e.g single coils) you will find a lot of fine sound nuances by changing op-amps, but that's just my opinion.
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hot tubes
Silver Member
Canada
162 Posts |
Posted - 10/12/2009 : 18:30:08
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seems to me that alot of mod guys don't change the op amp because
it does not really make that big of difference in the DS-1 .
The only modder that i know of who changes it out is Monte Allums in his new mod called the ROXX TRI GAIN PLUS mod , he uses a pair of
NE5532's ,and also on his rectifier tri gain mod , he uses a pair of
BURR BROWNS .
has anyone tryed any of these changes , looks interesting ... |
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Topic |
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BOSS DS-1 mods
