Lell X-Metal

An old russian Boss MT-2 derivate. The eq section and the general topology is pretty close to the original. But cap and resistor values differs quite a lot in most places and the gain control looks like it is borrowed from a Boss DS1.  

 

 

 

Lell EP Parametric Equalizer

 A 3 band parametric eq from the Soviet Union, anyone? Electronic switching is removed and op amp is altered for normal 8 pin DIP package which replaces the odd dual op amp 14 pin DIP package.

As for R28 which is connecting across the output of the last op amp and ground, the schematic simply says "100". Could be iether 100 ohm or 100k but 100 ohm seems a bit low?

 

Upsate 260712. R28 confirmed to be 100k. 

 

 

 

Lell Heavy Metal DEQ-700

 Schematic avaiable HERE

 

The switch appears to a on/off selector for the distortion section so it can be used as a stand alone eq pedal as well. 

 

Lell Hyper Distortion

 

 

 

 

Lell EX-9 Exciter

 Schematic avaiable HERE

Note that pot lug numbers isn't labelled in the schematic. And the pot tapers is unknown but my best guess is that they are linear. 

This one seems to be a treble booster/light overdrive with a tonestack somewhat related to a parametric eq.

 

Lell DD Drive Distortion