We found existing online resources lacking in terms of schematics for these common reverberation components. Here are some simple starting points to build your own echoey adventures.
Sprung!
Sprung! is the result of several failed attempts to track down a decent schematic to drive a Mod™ 8EB2C1B spring reverb tank. After-market spring reverb tanks have a variety of input and output impedances and insulated/non-insulated jacks. The variety of schematics is equal to the variety of tanks, but not many specific to this particular model. This design incorporates overdrive and feedback circuits, to provide a very basic module to drive this specific tank.
(RCA out to the reverb tank is actually on the back of this module as a personal preference, based on where the tank is located in relation to the case. These jacks could be moved to the front panel as your heart desires, or your rig demands.)
Schematic
As with any schematic found on the internet, exercise caution when building. Test the build before plugging it into your case. If you find mistakes in the schematic, or you have recommendations for improving the design, feel free to contact us and let us know.
BOM
- Capacitors
- 470pf (1) C1
- 22uf (electrolytic) (1) C2
- .47uf (electrolytic) (1) C3
- 10nf (2) C4, C5
- Resistors
- 67R (1) R7
- 470R (1) R13
- 4.7k (1) R8
- 10k (2) R4, R10
- 20k (1) R2
- 120k (1) R6
- 200k (2) R3, R11
- 470k (2) R1, R9
- 900k (1) R5
- 1M (1) R12
- Potentiometers
- 100k (3) RV1, RV2, RV3
- ICs
- TL074 (1) U1
- TL072 (1) U2
- Audio Jacks (2) J1, J2
- RCA Jacks (2) J3, J4
Adverb
Adverb is a stereo reverb with individual control over depth and mix for each stereo channel. Built on the Accutronics/Beltron BTDR-3 (H/V) unit, this schematic should be applicable to H (horizontal) or V (vertical) configurations. Mono or stereo input (mono input normalizes to both channels).
Schematic
As with any schematic found on the internet, exercise caution when building. Test the build before plugging it into your case. If you find mistakes in the schematic, or you have recommendations for improving the design, feel free to contact us and let us know.
BOM
- Capacitors
- 6.8nf (1) C1
- Resistors
- 1k (2) R7, R9
- 2.2k (3) R3, R4, R6
- 22k (2) R1, R2
- 100k (2) R5, R6
- Potentiometers
- 10k (2) RV1, RV2
- 100k (2) RV3, RV4
- ICs
- TL074 (1) U1
- Digi-Log BTDR-3 (N/V) (1) U2
- TL072 (1) U3
- Audio Jacks (4) J1, J2, J3, J4
Lil’ Verb
Lil’ Verb is a mono reverb module with dual outputs. Built on an Accutronics/Beltron BTDR-1 unit, this schematic should be applicable to both H (horizontal) and V (vertical) configurations, and S (short), M (medium) or L (long) decay times. Mono input with mix control over two identical outputs, and feedback control over both outputs.
Schematic
As with any schematic found on the internet, exercise caution when building. Test the build before plugging it into your case. If you find mistakes in the schematic, or you have recommendations for improving the design, feel free to contact us and let us know.
BOM
- Capacitors
- 10nf (1) C1
- Resistors
- 1k (2) R6, R7
- 2.2k (2) R2, R3
- 22k (1) R1
- 100k (2) R4, R5
- Potentiometers
- 10k (1) RV1
- 100k (2) RV2, RV3
- ICs
- TL074 (1) U1
- Digi-Log BTDR-1(H/V) (1) U2
- Audio Jacks (3) J1, J2, J3