Akashic Guitar effects PCB lookup
DRIVETREBVOLBASSSAT

1590B · 5 knobs

Fuzz Dog· SecScrm

Secret Screamer

Based on the TSV808

Category
Overdrive· OD/Dist/Preamp
Controls
Drive · Treb · Vol · Bass · Sat
Difficulty
Medium
Price
£54.00
Tags
od-distortion

From the vendor

One of those pedals that came and went in a flash, got snapped up and is now likely a decent chunk of a lot of people's retirement funds... Essentially a mash up of a Tube Screamer and a Jan Ray (or a Timmy if you want to be picky, since the JR is a Timmy clone). The 'original' has your standard TS three knobs - Vol, Gain and Tone, with a couple of internal trimmers to set Saturation and Bass. It also has internal DIP switches to play around with the clipping options. You can opt to go for this format if you want to, but we know y'all like to tweak. We've added the option of Bass/Sat pots and external toggle switches for the clipping. Why not? It's a little pricier than you may expect for a Screamer, but those OPA2134 op-amps are getting silly expensive. The kit is supplied with vertical-mount pots which have round shafts, so you'll need set-screw fitting knobs. Pot spacing is very tight (17.5mm) if you go for all-external controls, so you'll need small knobs. 1900H fit well. If you want the PCB without parts there's a link for that at the bottom of the page. Partial kit: PCB, all board-mounted components, pots. Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED. Enclosure (pre-drilled) is available was an option with full kits, and will not take a battery. Knobs are not included. Builds are only available with full kits including enclosure and vertical-mount pots. Please choose appropriate knobs. Inspired by: TSV808 Difficulty: Medium PCB size: 50 x 53mm Knobs required: 3/5 Enclosure: 1590B Direct-Connect compatible (4-way) Download INSTRUCTION PDF

Schematic

The schematic is in the vendor's build document, page 3. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 40 rows

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RefValueNormalizedTypeNotes
Resistors 17
R11M1M
R21K1k
R3510K510k
R410K10k
R533K33k
R61K1k
R710K10k
R81K1k
R910K10k
R106K86.8k
R1112K12k
R1210K10k
R134K74.7k
R14100R100
R159K19.1k
R167K57.5k
R17100R100
Capacitors 12
C127n27n
C222p22p
C351p51p
C433n33n
C5150n150n
C682n82n
C71u1u
C8150p150p
C91u1u
C10100n100n
C1147u47uelec
C1247u47uelec
Diodes 5
D21N41481N4148
D31N41481N4148
D41N41481N4148
D51N41481N4148
D11N58171N5817
ICs 1
IC1OPA2134OPA2134
Potentiometers 5
DRIVE500KAA500kPotentiometer
TREB10KBB10kPotentiometer
VOL10KBB10kPotentiometer
BASS50KBB50kPotentiometer
SAT10KBB10kPotentiometer