Pedal mods - Zeta Sound

Boss pedal ACA to PSA mod

Updating old boss pedals for PSA adapter.

ACA sticker
Components involved
Components removed and jumpered

ZOOM MS-70CDR custom paint

A custom paintjob on a ZOOM MS-70CDR Multistomp pedal.

Zeta Sound Zoom MS-70CDR custom paint
Zeta Sound Zoom MS-70CDR custom paint
Zoom MS-70CDR original
Zeta Sound ZoomMS70-CDR guts
Zeta Sound Zoom MS-70CDR guts
Zeta Sound Zoom MS-70CDR guts
Zeta Sound Zoom MS-70CDR guts
Zeta Sound Zoom MS-70CDR guts
Zeta Sound Zoom MS-70CDR chassie
Zeta Sound Zoom MS-70CDR inside spring
Zeta Sound Zoom MS-70CDR outside spring

Boss DS-1 OD mod

Turning the Boss DS-1 into something more of an overdrive, giving it a more dynamic response. Changes are made to the transistor booster stage, OP-amp gain stage and the overall frequency respons. Check Thomas Ziden as he gives an somewhat unusual pedal demo.

Boss pedal latching/momentary mod

Ever since I made the T-rex Mudhoney 2:nd stage mod the idea has been there to try something similar on a Boss or Ibanez pedal. So here it is on a Boss DS-1 pedal, the feature to choose a latching or momentary bypass. The mod can be performed on any model from Boss or Ibanez that’s using their standard toggle circuit.

Zeta Sound Bypass mod

Ibanez WH10 Volume mod

Added a volume pot to an Ibanez WH10 wah pedal. Effecting the volume when the effect is engaged.

T-Rex Mudhoney 2:nd stage mod

2:nd stage mod of the T-rex Mudhoney. Installing a threeway switch wich in uper pos lets the circuit clip over AA144 germanium diodes, middlepos no diodes and down pos silicone diodes. Replaced the Boost switch with a stompswitch and a indicating led in its original position. Added an 2:nd circuit board that controls the fet bypass circuitry and has the option of using the stompswitch action as normal latching or momentary. Finaly a Tune pot to balance the gain against the Boost. More Info here.

Zeta Sound T-Rex Mudhoney mod
Zeta Sound T-Rex Mudhoney mod
Zeta Sound T-Rex Mudhoney mod
Zeta Sound T-Rex Mudhoney mod
Zeta Sound T-Rex Mudhoney mod
Zeta Sound T-Rex Mudhoney mod
Zeta Sound T-Rex Mudhoney mod
germanium diode AA144

Univox Uni-Tron 5

Since the Uni-Tron5 pedal requires two 9V batteries I had it modified with a charge pump allowing it to take a normal 9VDC adapter or one single battery. In the now empty battery compartment I added a pot for the output volume.

Uni-Tron 5 mod
Uni-Tron 5 mod
Precision rectifier/led driver in the Uni-Tron 5
Uni-Tron 5 opto module
Uni-Tron 5 schematic

Zeta Sound Uni-Tron5 mod

T-rex Mudhoney 1:st stage mod

Mod of a T-Rex Mudhoney. Installed a threewayswitch wich in left pos lets the circuit clip over red leds, centerpos no diodes and right pos silicone diodes. Replaced the Boost switch with a stompswitch and a indicating led in its original position.