§ 4 - 9 Pin (B9A base) Tube Prototyping Board

This PCB is designed to make prototyping B9A tube stages very easy, while turning out a good looking and functional result. This is accomplished with a carefully designed series of pad/via interconnects on the bottom side of the PCB that make component interconnection easy, and largely or completely wire jumper free (see diagram below.)

Because 9-pin B9A tubes often have more than one tube unit internally, there is a "ground spider" designed into the layout that will help reduce crosstalk between tube pins when grounded. To use it, simply connect any one of the spider layout's vias to a ground source.

The eight edge connections naturally accommodate two AC lines for the tube filament, B+, ground, and one to four additional connections.

§ 4.1 - Build Guide

This PCB requires the following tube socket, or similar:

Paid link(s) from Amazon:

• SMAKN 5 PCS Ceramic Gold Plated 9pin B9A PCB Mount Tube Socket for 12AX7/ECC83/12AT7/6DJ8

Optional: If you'd like to use edge connectors, these are the ones the PCB is designed to accept:

Paid link(s) from Amazon:

• SamIdea 60pcs 2P 5.08mm Spacing PCB Mount Screw Terminal Blocks Socket Strips for Arduino, Blue 300V/16A

This PCB is designed to be easily mounted in a metal case, or on a wood base. You should use the unassembled PCB as a guide as shown on this page, using the following hardware:

Paid link(s) from Amazon:

• Litorange 240 Pieces M3 Male Female Hex Brass Spacer Standoff Screw Nut Threaded Pillar PCB Motherboard Assortment Kit
• binifiMux 100 Pieces M3x6mm Carbon Steel T-Nuts Zinc Plated 4 Pronged Tee Nut

 

Have a question? Ask us via email

 

This web site was created with wtfm wtfm uses aa_macro and SqLite wtfm and aa_macro are coded in python 2.7