WARNING FAKE OC81D's !

R.Kirkland

Member
Messages
234
Well it is with sad regret I have been the one to break the news. Unfortunately, I am afraid alot of folks here have been scammed on some "Mojo" !

I recently received a pedal from a repeat customer. One that he purchased from another builder, and wanted me to retune . when I received the pedal many resistor values were strange, so I "clipped" the transistors ( mullard OC81D's) out to take their readings. 2 of 3 were pretty far from usable, hence the attempt to salvage with odd resistor values. No big deal I did all the repair , threw in a set of transistors. and good to go.

I always send removed parts back with repairs I was putting the transistors in a bag and noticed that 2 of them no longer said OC81D....simply OC .....WTF? Look closer and there is a very small wad of something at the end of the transistor.. Same on the other.. The third still has the 81D . Looking closely I can see that the 81D is a rub-on-decal.. and the small wad on the other 2 are where they came up from the small amount of handling I did to remove them . I can now see when held in the light just right they were actually OC78 !!!! .. Someone took alot of time in making these rub on's look passable .My honest opinion is , there is no way a builder could build numerous pedals with these transistors and not notice this by now. So if the builder bought them like this or not, is debatable.

SO.... IF you have purchased a MKII (or any fuzz )with MULLARD OC81D printed "lengthwise" of the can . Check to see if this is the case with your purchase. The 81D will come off very easy and the rest of the printing wont budge , I promise.. Here are some pictures of what I ran into .



Notice the 81 slightly lifted



Ummm WOW




and again



Real Mullard OC81D



Real OC78 and OC78D . Notice printing orientation of the 78 vs 78D



Real OC76



Real OC84



Now everyone will start seeing these guys pop up soon . let me tell you I bought 50 of them and 27 were all together JUNK.. The rest are usable but all over the place in gain range and leakage. DO NOT spend you "mojo" money here.. If they are good then good. Problem is the sleeves come off and will look " correct " on any number of transistors that span the Globe. as the REAL Mullard OC81M does not have any printing on the actual can, it is impossible to verify they're real. There are a few characteristics that are visible of mullards, but these same manufacturing styles were used by RCA, Mullard, and NewMarket to name a few. So you have to trust your builder on these. BUT NO MOJO MONEY !!!!! Damn it !

Point in case here.






So to summarize, It really pisses me off to know that someone builder/ or supplier , doesn't matter, feels the need to pull this kinda crap on someone to make a buck . Besides that they just Mucked up an actual Mullard in the process. IF you are going to pull this **** as a builder I really feel sorry for you , and worse for the buyer. The truth WILL come out .. I promise..

I truly Apologize for the hit a few folks are about to take. Good luck !


Ryan
 

R.Kirkland

Member
Messages
234
Does the same apply to all the fake NKT-275's out there?
How do you mean ?

I haven't seen any fake NKT275's , just different manufacturers "THE" NKT275 is the Newmarket brand. Tungsram has a 275 that is less desirable. Same goes for the AC128's They are all easy to spot though.
 

SonicVI

Member
Messages
1,606
I could totally see this happening the first time I was able to slip one of those 81M sleeves off a bad piece (which was about a third of the ones I bought). If anybody does try to pass off something else they'll have to remove the old print which will probably leave some kind of evidence of the removal, sanding marks or something.

I've seen a few pedals on ebay with these in them already. Those builders are gonna probably gonna have to show their trannies unsleeved now.
 

sfx

Member
Messages
289
Not surprizing. I've purchased "fake" MN3005 delay chips before on eBay that originated from Asia. These particular chips were actually relabelled MN3008's, which have half the delay time.

You have to be careful in only getting old parts like this stuff parts from a trusted source I guess.
 
Messages
422
Oh christ I hope none of those ended up in mine... I got about 50 or so from a guy in the UK who worked on radios, most of mine were written lengthwise too. If by chance anyone has a pedal of mine with fake OC81Ds contact me please. My OC81Ms seem legit, there was a load on ebay.
 

R.Kirkland

Member
Messages
234
Oh christ I hope none of those ended up in mine... I got about 50 or so from a guy in the UK who worked on radios, most of mine were written lengthwise too. If by chance anyone has a pedal of mine with fake OC81Ds contact me please. My OC81Ms seem legit, there was a load on ebay.

Who Was the Seller of the 81D's? I got my 81M's from Langrex , i assume that is where we all got those.
 
Messages
422
It was just an indivdual that approached me after I made a few posts on various vintage radio forums asking for some 81Ds. I don't have his name at the moment, this was back in May or June. I never noticed anything weird with mine other than some faded lettering.

I also got a few 81Ds from mark5 in the UK, they're a supplier but I know those were legit. I bought some of those 81/81D sets that were on ebay over the summer too but those are fine too.

All of my other stuff came from langrex or a german seller on ebay.
 

R.Kirkland

Member
Messages
234
Seems to be the same few I have bought from as well.I got my matched sets from applseyhill or something like that before he decided they were worth 100.00 a set. I know Mark Hines had the same trio thing going for a few minutes. Those were legit too .

I don't know about the vintage radio guy you got those ones from, but I would be crawling up his ass right about now if that is the case.

Do you have more of them to verify , or have they all been sent out ?

This whole OC81D mojo crap has gotten out of hand and destroys any desire I have to try and locate anymore .. Cant trust anyone.. Damn shame .
 

SonicVI

Member
Messages
1,606
Mojo in general has kinda gotten outta hand. I like it as much as the next guy, as anybody who has seen my builds has seen, but when people have gotten to the point of caring as much about what's inside a pedal as much as how it sounds then something just seems wrong to me. Unfortunately it's almost a necessity if you want to sell pedals these days.
vvvvvvv
 
Messages
422
Seems to be the same few I have bought from as well.I got my matched sets from applseyhill or something like that before he decided they were worth 100.00 a set. I know Mark Hines had the same trio thing going for a few minutes. Those were legit too .

I don't know about the vintage radio guy you got those ones from, but I would be crawling up his ass right about now if that is the case.

Do you have more of them to verify , or have they all been sent out ?

This whole OC81D mojo crap has gotten out of hand and destroys any desire I have to try and locate anymore .. Cant trust anyone.. Damn shame .
I have some that were leaky I might have laying around. I'm not home now so I'll check later. I ran out of good ones about two months ago thats why grabbed those 81Ms as a substitute. Luckily I haven't cleaned out my email for months so I should have his email and name at least.

I've notice another popular tonebender clone that used the DSI 81Ds with the DSI logo scraped off... a little less deceiving than this **** though.
 

zosozep7

Platinum Supporting Member
Messages
8,049
Hey Skinpimp and Lumpy. Thanks for watching out for us! This imformation is great to know. Especially since Ive been shopping for MKII pedals. It doesnt suprize me these days with all the counterfeit junk floating around.
 

cuz/karl

Member
Messages
3,074
I have a buddy that just started doing pedal mods a wail back so I asked him to put a MKII together.He said he got OC81D's and I was surprised.I however was not surprised when they turned out to be bunk.I don't know if they were fake but they were super week.You could hardly tell the pedal did anything with all the knobs dimed.He payed $7 apiece for them.
 

JLee

Gold Supporting Member
Messages
2,801
I have a buddy that just started doing pedal mods a wail back so I asked him to put a MKII together.He said he got OC81D's and I was surprised.I however was not surprised when they turned out to be bunk.I don't know if they were fake but they were super week.You could hardly tell the pedal did anything with all the knobs dimed.He payed $7 apiece for them.
The black glass DSI OC81Ds measure pretty low in gains. Vintage transistors can be all over the map in gains and leakage and need to be tested before being used in a circuit. No guarantees these days unless the seller is selling them as tested.
 

aman74

Silver Supporting Member
Messages
9,060
But what's going to happen to all these people's magic tone?

I feel the misrepresentation of the producit is dispicable, but it brings up an interesting point that some people could take note of.

If I've got this shiny new pedal and it sounds so fantastic and I proudly proclaim the virtues of the "right" trannies...what happens to my tone when I learn they are fakes?

Well, of course it was either:

All in your head and you convinced yourself it sounds great or

It does sound great, but you learned that maybe, just maybe it's circuit design and tweaking that's what matters and not mojo parts.
 

Jahn

Listens to Johnny Marr, plays like John Denver
Silver Supporting Member
Messages
29,186
holy crap. the hunt for OC81 trannies is big enough to bring in the fraudsters? the decal thing is ridiculous, totally ruining other people's builds to make a buck off a part, what arses.
 
Messages
422
Surely enough I got an email this morning and a few fakes made it into one of my pedals. I got scammed and unknowingly scammed someone else the process, this is ******** all for a freaking transistor. I'm in the process of finding out who the original seller was or really was, though at this point I'm not sure how much could be done.
 






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