Fet version of the JCM800 using LND150 mosfets

Schematics (pdf)

Ready to transfer PCB (pdf)

Upper side assembly (pdf)

Bottom side assembly (pdf)

Controls and input jacks (pdf)

Comparative samples of fet & "glass" versions.

Low input

High input

Mini head preamp JCM800 + FX loop + 5W FET PA.

Vynyl mini head version

Another one test of the FET & tube preamps in mini head.

Fet_vs_Tube

Legend

SX_Y

X - track

Y - preamp

SX_YG - only guitar track without mix

Video test by Konstantin Dolotov, input Hi

Video test by Konstantin Dolotov, input Low