Are these 1S1588 counterfeits?

rosssurf

New member
I do not recall where I purchased these. But, snake oil or not, Is there a relatively easy way to tell if these are legitimate Toshiba 1S1588 diodes?
1000018625.jpg
 
Well, I kinda take that back.
I just checked my supply and I still have 6 with a wide band similar to that. But the color is a little darker and the band is further on the end of the diode, almost like a cap. The band on those in your pic almost looks flared out on the end.
 
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They look different depending on the angle of the pic. Sometimes it looks like a blue cap sometimes it looks like a band.
Sometimes it's hard to see the middle band.

This is the only place I will buy them from. I don't have to guess if they're legit or not. Now whether they're in spec or not is a different story.
The only spec I really care about if forward voltage, and every vintage style pedal I've put them in has sounded awesome.
 
This is the only place I will buy them from. I don't have to guess if they're legit or not. Now whether they're in spec or not is a different story.
The only spec I really care about if forward voltage, and every vintage style pedal I've put them in has sounded awesome.
Yep, it's where I get mine. I've got a cache of at least 60 right now, so I'm going to be good for a while.
I use these in any circuit that uses 1N4148/1N914s for clipping. Don't think I'm going back.
 
I was wondering about this too...

What is the benefit of using these over a 1N4148 or 1N914? Genuinely asking, I'm not familiar with these diodes.
When I built out my first DS-1 clone (original '81 layout), I socketed the diodes and tried 1N914s, 1S2473s and then the 1S1588s.
The 1588s sounded the most.......musical? - the other two, being played back-to-back, sounded harsh (to me, anyway). I thought I was hearing things, so I went back and tried the 2473s again, and nope - the 1588s sounded better.
I might still 'roll' through some diode types in the future, but will likely use 1588s as my default clippers.
 
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Thanks everyone. these are going in to a "Little Green Scream machine" build. I am excited to use sockets to test different diodes. In the same build it calls for a 1n5187 protection diode. Will a in4001, 1n4002 work the same even though, (as I understand it) they provide slightly less voltage to the circuit? might I notice any difference in sound even through a very revealing BF Fender amp?
 
I am getting ready to start a paragon in the next couple of weeks. Has anyone actually done any analysis of the 1s1588 vs the 1n914? Just curious if there is actually much of a difference between the two or if it is more of a psychosomatic kinda thing? the 1588s blow my pedal budget up a little bit (read my wife's budget for my pedal) and just trying to figure out if its worth the added cost at this point.
 
I am getting ready to start a paragon in the next couple of weeks. Has anyone actually done any analysis of the 1s1588 vs the 1n914? Just curious if there is actually much of a difference between the two or if it is more of a psychosomatic kinda thing? the 1588s blow my pedal budget up a little bit (read my wife's budget for my pedal) and just trying to figure out if its worth the added cost at this point.
You should check out the diode comparison that @thomasbe86 put together. Suffice to say, the difference between the 1S1588/1N4148/1N914 probably won't be noticeable:
1765900534263.png
 

1765902107032.png
(obviously, Vf makes a difference)
 
You should check out the diode comparison that @thomasbe86 put together. Suffice to say, the difference between the 1S1588/1N4148/1N914 probably won't be noticeable:
Thanks @PedalBuilder ! I put the data in a more user friendly interface here
easier to search, filter, etc.

Oh and I added the possibility to have them in series, freeze a curve, compare, etc.

1765909708613.png
Oh yeah? Post gut shots on TGP and see how noticeable it is. :ROFLMAO:
@Robert sharpen the pitchforks!
 
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