Akashic Guitar effects circuit lookup
FBMIXMODTIME

Enclosure not stated · 4 knobs

Scientific Guitarist

Echoplexus Tape DelayA PT2399-Based Workalike of the Classic Tape Echo

Category
Delay
Controls
Fb · Mix · Mod · Time
Price
see vendor

From the vendor

I know, I know. Another PT2399 delay. Big whoop. But wait, I promise you'll like this one! The Echoplexus is a PT2399-based take on the legendery Echoplex EP-3, complete with discrete JFET preamp. But that's not all. The preamp can be switched out for an opamp-based preamp if you prefer. There is also a “wet kill” function that will allow you to use the preamp on it's on and run the pedal in buffered bypass mode for that mojo and give you trails functionality. The filtering has been painstakingly tailored to get that “tape” sound where both high and low end are rolled off on the repeats. Additionally, a modulation section with two different frequencies is implemented to provide modulation at frequencies that correspond to the physical tape motion of the EP-3. In short, it's not the run-of-the-mill “analog” voiced PT2399 delay. So stick around, you just might like what you see.

Schematic

The schematic is in the vendor's build document, page 1. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 104 rows

Report a wrong parse

Got parts in a drawer? See what you can build with them.

RefValueNormalizedTypeNotes
Resistors 35
R11M1M
R2100k100k
R3220k220k
R4100k100k
R51M1M
R64k74.7k
R722k22k
R84k74.7k
R910k10k
R1010k10k
R1110k10k
R1210k10k
R1310k10k
R1410k10k
R151k1k
R165k65.6k
R172k22.2k
R182k22.2k
R1918k18k
R2022k22k
R2122k22k
R221k1k
R23100k100k
R2510k10k
R2610k10k
R2710k10k
R2815k15k
R294k74.7k
R30470k470k
R3210k10k
R332M22.2M
R342M22.2M
R3515k15k
R36120k120k
R371k1k
Capacitors 39
C1100n100n
C247u47u
C347p47p
C4220p220p
C522n22n
C610u10u
C7100n100n
C8100n100n
C9100n100n
C10100n100n
C11100n100n
C12100n100n
C131u1u
C141n1n
C154n74.7n
C164n74.7n
C171n1n
C18220n220n
C19470n470n
C201u1u
C22220n220n
C231u1u
C24100p100p
C251u1u
C26100u100u
C2747u47u
C28100u100u
C2910u10u
C3010u10u
C3110u10u
C3210u10u
C331u1u
C341u1u
C351u1u
C36470n470n
C37470n470n
C384u74.7u
C394u74.7u
C404u74.7u
Diodes 5
D1B5817WS-TPB5817WS-TP
D3B5817WS-TPB5817WS-TP
D4B5817WS-TPB5817WS-TP
D5B5817WS-TPB5817WS-TP
D6B5817WS-TPB5817WS-TP
Transistors 3
Q2MMBF5457MMBF5457
T1MMBT5088LT1GMMBT5088LT1G
T2MMBT5088LT1GMMBT5088LT1G
ICs 4
IC1TL072DTL072D
IC2TC1044SEOATC1044SEOA
IC3DIP16DIP16
REG1LM78LLM78L
Potentiometers 4
FBB50kB50k
MIXB100kB100k
MODB500kB500kDual
TIMEB50kB50k
Trimmers 1
PRETrimmer
Switches 2
SWLSP10LSP10
SW_1DPDTDPDT
LEDs 3
D2LEDLED
LEDLSP10LSP10
R24RLEDRLED
Other 8
+9VLSP10LSP10
GNDLSP10LSP10
GND_INLSP10LSP10
GND_OUTLSP10LSP10
INLSP10LSP10
OUTLSP10LSP10
OUT1LSP10LSP10
OUT2LSP10LSP10