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BASSGAINMIDTREBVOL

1590BB · 5 knobs

Fuzz Dog· t50pre

Traynor TS-50 Preamp

Based on the Traynor TS-50 Preamp

Category
Preamp / Amp-in-a-box· OD/Dist/Preamp
Controls
Bass · Gain · Mid · Treb · Vol
Difficulty
Medium
Price
£60.00
Tags
od-distortion

From the vendor

Guitar version of the highly sought-after Traynor TS-50B bass amp. The unmistakeable tone of Shellac-era Steve Albini, Bob Weston and David Wm. Sims.

The circuit is almost identical to the bass model other than the gyrator Mids control that makes this version really special.

The circuit has some unique elements. The op-amp and Fender style tone stage are fairly standard, but after the tone the signal is split into 3 bands, each of which is distorted separately. Why? Ask Traynor's engineer for the technicals, but tailoring the compression to the individual bands makes for some really sweet clipping.

Lots of headroom thanks to the very expensive +/-15V DC converter supplying the juice.

Note: With gain and EQ cranked you may get high-frequency oscillation depending on your setup. This can be mitigated by having this circuit in a buffered chain, or simply winding things back a bit. You hve been warned. If you aren't happy with that, don't order.

If you go for top jacks we'll supply Lumberg jacks so they'll fit nicely above the pots.

If you want the PCBs without parts there's a link for that at the bottom of the page.

Partial kit: PCBs, all board-mounted components (not footswitches), 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 as an option with full kits, and will not take a battery. Knobs are not included.

Builds are only available with full kits including enclosures. Please choose appropriate knobs.

Inspired by: Traynor TS-50 Preamp

Difficulty: Medium

PCB size: 80 x 50mm

Knobs required: 5

Enclosure: 1590BB

Download the 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 69 rows

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RefValueNormalizedTypeNotes
Resistors 26
R12M22.2M
R410K10k
R61M51.5M
R72K22.2k
R103K33.3k
R1227K27k
R13680R680
R1462K62k
R1562K62k
R166K86.8k
R174K74.7k
R1827K27k
R194K74.7k
R202K22.2k
R2115K15k
R2218K18k
R238K28.2k
R243K33.3k
R2518K18k
R2618K18k
R2739K39k
R286K86.8k
R29180R180
R30270K270k
R3122K22k
R32270K270k
Capacitors 26
C147u47uelec
C210u10uelec
C310u10uelec
C4100n100n
C5100n100n
C668n68n
C910p10p
C10220n220n
C114u74.7uelec
C14100u100uelec
C151n51.5n
C16220n220n
C17100n100n
C194u74.7uelec
C2033n33n
C2147n47n
C2233n33n
C234u74.7uelec
C2433n33n
C254u74.7uelec
C264u74.7uelec
C2733n33n
C2822n22n
C291n1n
C3022n22n
C3147p47p
Diodes 3
D21N41481N4148
D31N41481N4148
D11N4743A1N4743A
Transistors 8
Q22N39062N3906
Q32N39062N3906
Q42N39062N3906
Q52N39062N3906
Q62N39062N3906
Q72N39062N3906
Q1MPSA18MPSA18
Q8MPSA18MPSA18
ICs 1
IC1TL071TL071
Potentiometers 5
BASS50KAA50kPotentiometer
GAIN1MAA1MPotentiometer
MID50KCC50kPotentiometer
TREB50KBB50kPotentiometer
VOL50KAA50kPotentiometer