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Borish Electronics

Fender Blues Junior Jr. Tube Board PCB (Custom Replacement)

Fender Blues Junior Jr. Tube Board PCB (Custom Replacement)

Regular price $22.99 USD
Regular price Sale price $22.99 USD
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These are exact drop in replacements for Fender Blues Jr Guitar amps.   To the best of my understanding, there are only two versions. Green board Blues Jr's have pilot light wiring, noise reduction resistors and load stabilization diodes on the board.  Cream colored boards do not.  

All current boards made after 2001 are cream colored boards and anything before is a green board.  Please don't ask me to figure out what board you need.  If you are confused, open up the back and compare the circuitry you have with the pulled boards in the pictures.  There is no official Fender revision chart.  See below for more details. 

These boards have plated through holes which provide double the tube socket holding strength of the originals and double-sided routing to eliminate cross talk as well as noise.  As in improvement, we've added 1 ohm current measuring resistors to easily measure the health of your power tubes.  

I will include the tube board, two one ohm resistors, and five high quality ceramic sockets.  The R3000's, 1N4448, the 150 Ohm current limiting LED resistor, and the 1W 47 Ohm noise reduction resistors will be included with the green board. You will need to install this board and assemble it. Don't attempt to install this kit if you don't know what you are doing because the voltages inside the amp can KILL you.

Wholesale inquiries are welcome!

Revision Board Date Major Change
A Green Board 03/03/95 Product Introduction
B 05/15/95 Unknown
C 10/29/96 Revised preamp and FAT circuit
D 07/29/98 Unknown
A Cream Board 03/21/01 Revised reverb circuit, new board layout
B 04/20/02 Added fuse on filament line
C Black PCB Boards, like on the Hot Rod Blues Jr. IV, are Cream Boards. 2003 Corrected backwards polarity on filter cap for -15V reverb supply

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