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1s1588 Test
- Thread starter Bognanzo
- Start date
Betty Wont
Well-known member
They appear to be pretty standard silicon diodes. And both of those are very trusted vendors. You could sub 1n4148 for them and get the same results a lot cheaper. You can use your DMM to check that they are functioning diodes.
Thanks for the quick response!
So I know about 1n4148 being substantially similar. At this point I bought them and already have them. If they are real...great I'll use them, if not... I'll use the sub.
So in my research 1S1588 are not quite as easily obtainable as they used to be, and there are in fact alot of counterfeits out there. Also interesting enough if you google Hitachi 1s1588 (2 blue bands) you don't find a whole lot so I can't entirely verify they were ever made by Hitachi.
I have tested them and they work, I would like to know if they are legit. I know a static vf doesn't tell you a whole lot so just looking to see if anyone had a method.
So I know about 1n4148 being substantially similar. At this point I bought them and already have them. If they are real...great I'll use them, if not... I'll use the sub.
So in my research 1S1588 are not quite as easily obtainable as they used to be, and there are in fact alot of counterfeits out there. Also interesting enough if you google Hitachi 1s1588 (2 blue bands) you don't find a whole lot so I can't entirely verify they were ever made by Hitachi.
I have tested them and they work, I would like to know if they are legit. I know a static vf doesn't tell you a whole lot so just looking to see if anyone had a method.
Betty Wont
Well-known member
If they work, they are legit diodes. It looks like you are asking if what you have is a certain brand of them?
Sure they are legit diodes, the answer I am trying to ascertain is are they legit 1S1588s (again, there are people selling legit diodes that claim to be 1S1588's that are not actually 1S1588s).
I only mention the brand because usually you see they are made by Toshiba not Hitachi.
I only mention the brand because usually you see they are made by Toshiba not Hitachi.
Betty Wont
Well-known member
You got them from a couple of the most trusted sources available for new old stock parts. I would have no trouble trusting the authenticity from them. I think the only other thing you could do is ask the vendor to show you the original packaging if they have it.
MichaelW
Well-known member
There's two places I've gotten legit 1S1588's from (and neither are PedalHacker, those dual band ones he used to sell are not 1S1588's)
Retroampolis
And this Ebay Seller. Brian is a pretty good guy. I just recently got some from him.
Edit: There may be other sources, these are just the two I've gotten them from.
Retroampolis
And this Ebay Seller. Brian is a pretty good guy. I just recently got some from him.
Edit: There may be other sources, these are just the two I've gotten them from.
Last edited:
SillyOctpuss
Well-known member
I definitely wont take Pedalhacker at face value anymore.
To the OP, as the others have said, if those diodes measure the same FV as any 1n4148s you have on hand they'll be fine whether they're Toshiba 1s1588s or not.
SillyOctpuss
Well-known member
I've never dealt with that ebay seller but always had good service from retroamplis.
Betty Wont
Well-known member
I’ve never had an issue with anything from pedalhacker, but I also don’t believe in magic diodes and don’t play that game.
SillyOctpuss
Well-known member
I don't believe in magic diodes either. I do believe in being honest with your customers though. After questioning the authenticity of some parts I received and giving him my readings he admitted they weren't the correct part and claimed someone in england scammed him by selling these to him as something else. He claimed he was "just trying to recoup his losses" - that would be by attempting to scam me and anyone else who bought these.
Fucking disgraceful behaviour IMO. I'll never give him another penny.
Laundryroom David
Keyboard Cowboy 🤠
I’ve had good experiences with that EBay seller as well. Not specifically with these diodes, but with transistors and ICs.
jimilee
Well-known member
Those are the unicorn tears you hear so much about.
He is still selling them. https://www.pedalhackerelectronics....-Silicon-Diode-NOS-RARE-KOT-p/1s1588-10-h.htm
Thanks for the other sources
What parts did he do that with?
Harry Klippton
Well-known member
I thoight pedalhacker shut down 
SillyOctpuss
Well-known member
It wasn't the diodes you're asking about.
To be clear I bought a lot of parts from Michael over the years and apart from being unbelievably slow to ship or respond to emails the parts themselves were always fine.
If he was scammed himself on these parts then that's a shitty thing to happen, however, passing that shittiness on to your customers is not how I would conduct myself and it's not a business I'd support ever again.
ICTRock
Well-known member
those diodes have the same Vf range (600-700mV) as 1n914/1n4148 at least as measured on my Fluke 179. I got a bag full of them back in the day while chasing unobtanium on ebay
there's nothing special about their Vf curve like a soft knee or anything
if we're talking where they show up often like King of Tone diodes, the ma856 diodes measured just north of 800mV ... if we're talking tube screamer diodes, the ma150s are what you're looking for as they measured much closer to 1V. The most common place you see them is the ts-7
there's nothing special about their Vf curve like a soft knee or anything
if we're talking where they show up often like King of Tone diodes, the ma856 diodes measured just north of 800mV ... if we're talking tube screamer diodes, the ma150s are what you're looking for as they measured much closer to 1V. The most common place you see them is the ts-7
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