HGE Contraptions (DIY hobby/NON-Business) -> Pedale Chitara Handmade / Modari Pedale / Wiring si Setup Chitare / Reparatii Ampuri

[Razvan S.]

HGE Contraptions 2in1 Booster (MXR MC401+BBE Boosta Grande clones, 165th pedal built) @vektor

 

[Razvan S.]

Inca o clona de Vemuram TSV808 @raducu

HGE Contraptions (hobby/non-business): HGE Contraptions Vemuram TSV808 Clone (166th pedal built)

[Razvan S.]

* HGE Contraptions Core Shaper EQ clone (167th pedal built)

Will most likely use two hifi OPAMPS when I have them instead of the 5532 and 072 (SMD adapted to THT, with the OPA1678 IC -> lower noise and clearer)

This is a parametric mid frequency eq (Mid knob + Mid Frequency knob), which also has Bass and Tone controls. Can also be used as a booster of sorts, in conjunction with the Volume knob.

In detail, the gain is +-16dB, the frequency sweep is about 300 to 3.3K, the Q is 2.4 in HI and 1 in LO. The beauty of this circuit is that the Q stays constant across the whole sweep and so does the gain.
Before this, there's a low gain input stage which gives a strong input signal and buffers the input while avoiding clipping at guitar levels throughout the circuit. The charge pump helps with the headroom, providing a +-9V supply so the boost levels can be reached without problems.
Following the bandpass, there's a very standard Baxandall 2 band EQ to take care of low and high frequency and add quite a lot of flexibility to the circuit when combined with the bandpass.