Archive for June, 2007

Jfet IV Board

Friday, June 8th, 2007

* * Sold OUT in 2009 and no more selling * *

This Jfet IV board was released in 2007.  The purpose of it is to modify a DAC or CD player IV converter.  It can be used for most current output DAC chips like PCM63, TDA1541, AD1862, PCM1702, PCM1704 etc…  NOS DAC is not recommend to use this Jfet IV due to excessive high frequency noises.

During the time of release, 2SK170 is used as the active device for IV.  It is now recommended to use 2SK369BL as the active device due to its higher gain around 40mS for better result.

Jfet IV Circuit

Jfet IV BOM