This is the PCB of a All J-FET low-noise preamplifier PCB. The design is based on the EB-108/435 designed by audio guru, "Mr. FET", Erno Borbely. Each gain stage is in cascode configuration so that high speed and low distortion performance can be obtained.

EB-108/435 was designed as high quality , low-noise discrete opamp. It was applied in the original project as a I-V stage( using inverting input). Being itself an opamp in nature, we adapted the design to make it a voltage amplifier instead thus this preamplifier board.

Each board consists of two unbalanced line stage, OR each board can be configured as a single channel balanced-in balanced-out line stage  ! For the latter case two boards will form a super monoblock balanced preamplifier !        

PCB dimension: 140mm x 62mm. 

PCB thickness 1.6mm. Super thick copper ( 2oz, 75um !!) is used, which is four times the normal thickness.

Surface Finishing : Double-sided soldermask coating for maximum durability !

We provide schematic and part list for this PCB by EMAIL.

We do air shipping worldwide at US$6.00. We welcome combine shipping.