Surfy Bear FET Reverb
R3 - 20160705
© Surfy Bear 2016
The Fender 6G15 Reverb has been used on thousands of recordings and countless live performances since the early 1960’s, when the first version appeared on the music scene. This project is NOT another solid state reverb! This is emulation of the 6G15 with analog FET technology using the same topology and principles as the original. Basically, the tubes in the original schematic are replaced with JFETS/MOSFETs and the output transformer with a current source. The circuit is all Class A, is optimized for a tube-like harmonic content, have input protection and is using a standard 12V DC power supply adapter. More info about this circuit can be found at http://surfybear.weebly.com
RefDes C1 C10 C2, C3, C6, C9 C4, C7, C8, C11, C12, C13, C17 C5, C14 C15 D1 D4 J1 J2, J3 LS1 MK1 Q1 Q2 Q3, Q4, Q5, Q6, Q8 Q7 R1 R2, R3, R11, R12, R18, R23, R26
Value 220pF 100uF 100nF
Type CAP CAP CAP ELYT CAP
10nF 22nF
CAP CAP 1N4002 LED DC JACK PHONEJACK RCA JACK RCA JACK BC557B IRF9510 2N5457 or MMBF5457 IRF510 RES 1/4W RES 1/4W
8ohm 2250ohm
1.5ohm 10k
Comment C10-MOD: extra 220pF Low ESR type
Reverse polarity protection, replace if needed. Optional Check polarity before connecting power supply Driver coil of reverb pan Receiver coil of reverb pan Vishay prefered. Selected for Vp: -1.58V, Idss: 3.27mA, +/- 20% preferred manufacturer: Fairchild Vishay prefered.
