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Genuine Silicon NPN transistors KT3102EM

Lot of 20 pieces

Made in USSR by 1991.

You will receive the same transistors with a green dot, as shown in the photo, that were used in the original Big Muff guitar pedal.

Here is a lot of 20 popular and widely known Soviet silicon transistors KT3102EM. These transistors gained wide popularity thanks to a whole line of famous guitar consoles Big Muff produced by the famous company Sovtek in the 90s.

I found a rather interesting story about these transistors on the Code Effect website and I want to share this story with you. I hope these guys won't be mad at me ;)

History of the Big Muff Russian:

The Big Muff was originally released in 1970 by Electro Harmonix. However, the company declared bankrupcy in the 80s. In the late 80s, Mike Matthews decided to buy an old Russian military factory ExpoPul located in Saratov, Russia, to produce vaccuum tubes under the name of New Sensors. EHX was back on track!

Mike Matthews met in the 90s two Russian colonels (True story!) running a factory making military training equipment, integrated electronics equipment quite close to guitar pedals. Meanwhile, many people asked for a return of the EHX Big Muff. The production then began in the Sovtek factory!

The first pedals that got out of the factory were the Red Army Overdrivre (ultra rare) and the "Civil War" version of the Big Muff. This is why there is a star logo with a bird on the side of the pedal, which is the Sovtek logo.

PCB is populated with film capacitors, carbon-comp resistors and of course 4 transistors like every Big Muff. The PCB is huge... As for transistors...They are unmarked, except for the white and green varnish dots on it. I did a bit of research and they are KT3102EM transistors. They are npn transistors with a hfe between 400 and 1000. A modern equivalent are the 2n5088 transistors.

This Big Muff is known for its massive sound with a lot of bass.Actually, the tone circuit let quite a lot of bass go through it, and coupling caps have higher value than traditional Big Muff versions. It is really a hell of a pedal. There is a massive sound going out of this box, it is very impressive!

Electric parameters:

Power dissipation                                 250mW
Collector-base voltage                                20V
Collector-emitter reverse voltage                20V
Emitter-base voltage                                    5V
Maximum collector current                    200mA
Forward current transfer ratio (hFE)  400-1000

Please note that photos of guitar consoles are for informational purposes only. I only sell transistors. 

We combine multiple items to save on shipping!


You can find the other parts in our store:


Shipping and Handing

Buyer pays fixed shipping costs including insurance for any country. Shipping costs for this item can be found in the section Shipping and Payments. This item will be shipped to you from Europe (Ukraine) by Registered Airmail within 1-2 business days after payment is received and verified.

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