Akashic Guitar effects PCB lookup
BLENDBRIGHTDEPTHRATE

1590BB · 4 knobs

PCB Guitar Mania

Soviet Phase

Based on the Estradin Phaser

Category
Phaser· Analog Phaser
Controls
Blend · Bright · Depth · Rate
Difficulty
Advanced
Price
€14.90out of stock

Heads up Builders widely report inconsistent quality from PCB Guitar Mania boards, and whether a given board works is a gamble. Read recent forum reports before ordering.

From the vendor

Project overview

Inspired by Estradin Effekt-2 Phaser, the legendary stompbox from the Soviet Era and one of the most interesting phasers you will ever hear.

Introduction

Estradin Effekt-2 Phaser was launched in the late 1980s at the same plant that manufactured the famous Soviet synths Polivoks/Formanta. It rapidly gained its status as one of the most desirable and great-sounding Soviet effects pedals ever made due to its profound analog phaser effects suitable for any kind of music.

In PCB Guitar Mania, we decided to produce a modern version of the board that maintains the unique characteristics of the original and makes it accessible to any DIY enthusiast that wants to have it in his pedalboard without the need to break into a museum of the Soviet era. If you are interested in boards of this period, we have an everyday expanding collection with other gems such as the LEL` DD and the Ltava.

This warm analog optical phaser has two modes of the intensity of the effect. The STAGES switch operates with intensity, allowing you to switch between a full circle and 1/3 circle so that you can get two different phasers in one box. It also features BLEND, BRIGHT, DEPTH, and RATE control knobs to give you deep control of your output signal.

Controls

Potentiometers

• Blend

• Bright

• Depth

• Rate

Switches

• Stages

For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.

Soviet Phase 1v1 – Building Docs

Soviet Phase – Drilling template

Schematic

The schematic is in the vendor's build document, page 7. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 93 rows

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RefValueNormalizedTypeNotes
Resistors 49
R38200R200
R3916k16k
R1360k360k
R40360k360k
R218k18k
R4118k18k
R318k18k
R421M1M
R451k51k
R432k22.2k
R591k91k
R44130k130k
R656k56k
R452k72.7k
R7330k330k
R462k2k
R856k56k
R47110R110
R956k56k
R48110R110
R108k28.2k
R4918k18k
R1156k56k
R504k74.7k
R1256k56k
R1356k56k
R1456k56k
R1556k56k
R1656k56k
R1756k56k
R1856k56k
R1956k56k
R2056k56k
R2156k56k
R2256k56k
R2356k56k
R2456k56k
R2556k56k
R2656k56k
R2756k56k
R2816k16k
R29360k360k
R3056k56k
R315k65.6k
R3251R51
R33820R820
R34820R820
R351k21.2k
R371k21.2k
Capacitors 27
C16n86.8n
C26n86.8n
C4680p680p
C5100n100n
C6100n100n
C7330p330p
C8220n220n
C9100n100n
C1068n68n
C1133n33n
C12100n100n
C1322n22n
C1410n10n
C1510n10n
C16330p330p
C176n86.8n
C226n86.8n
C347u47u
C1810u10u
C1910u10u
C20220u220u
C21220u220u
C23220u220u
C24220u220u
C2522u22u
C2610u10u
C2710u10u
Diodes 8
D16V8 Zener6V8 ZENER
D23mm3MM
D33mm3MM
D41N58171N5817
D51N58171N5817
D61N58171N5817
D71N58171N5817
D81N58171N5817
ICs 5
IC47660SPCA7660SPCA
IC524V24V
IC1TL074TL074
IC2TL074TL074
IC3JRC4558JRC4558
Potentiometers 4
BLENDB50KB50kPotentiometer
BRIGHTB100KB100kPotentiometer
DEPTHB2KB2kPotentiometer
RATEB220KB220kPotentiometer