Tuesday, 6 December 2022

Thursday, 24 November 2022

Exar OD-02 Overdrive

 Cool looking soft clipping overdrive using a discrete op amp setup.

Schematic is avaiable HERE.



Exar MT-1 Metal

 Might be something for the HM-2 fans? The gyrator frequiencies and Q's looks promising...

Schematic is avaiable HERE.



Exar DS-02 Distortion

 Schematic is avaiable HERE.



Exar HR-03 Hammer

 An old polish distortion which is based on Ibanez Trash Metal. Which is basically a  buffered and boosted Rat circuit with an additional fixed gyrator EQ stage after the distortion circuit.

Schematic is avaiable HERE.



Friday, 11 November 2022

Friday, 4 November 2022

Tesla AYZ-025 Fuzz Wah

 There is a layout for the fuzz section in library but here comes the whole package with the inductorless wah circuit ryincluded. The wah pot can be wired as a manual panel mounted "bandpass filter" tone control or wired through an expression jack. The fuzz section is based on Foxx tone machine but there is quite a lots of changes along the signal path wiith different component values, a couple of buffer stages and negative feedback resistors. However, the Tone control match the FTM so feel free to adjust the 3,3nf cap for a higher value to bring up some mids.

 

 


Tesla AYZ-033 Overdrive

 Slightly modified. Stock units had two 741 op amps but the layout is modified for a dual op amp. A 1458 will do the same job as two 741s.

 

 


Yamaha NE-1

 Schematic is avaiable HERE.



Electro Harmonix Attack Equalizer / Knockout EQ

 Found this in an older folthe usuader that I forgot. Includes some necesarry modernazations like true bypass, onbard charge pump, input and output caps and pulldown resistors.

Schematics is avaiable HERE.



Saturday, 29 October 2022

Electro Harmonix Bassballs / PedalPCB Lowballer Twin Envelepoe Filter

 It s time for a guest appearance!

Chris Stelloh of Capitalist Death Cult requested a layout for this one a while ago but I couldn't do it at the time so he went off and did his own. The layout is verified and good to go.

It is basically a EHX Bassbals with quite a few mods by PedalPCB. The internal trimpots are now extrenal pots. The Attack, Decay and the the distortion section are addons that wasn't included in the original Bassballs.



Wednesday, 26 October 2022