We developed this board for ourselves. We do a lot of prototyping of our tube designs and we wanted to have a high quality none dedicated prototype board we could re-use. We have now made these boards available to you.

Please see our complete project kits for 8 pin and 9 pin tubes as well as our 8 pin prototyping board.

Designed and custom made for Vacuum Tube Supplies, Llc. Our boards are made of high quality FR4 epoxy glass double sided. These boards are nearly 1/10 inch thick (0.093) using heavy clad 2oz copper. The boards have an easy to solder tin/lead coating and have solder masks top and bottom to minimize solder splashes.

Visit our eBay store at www.stores.ebay.com/Vacuum-Tube-Supplies

 Features:

• Designed for three 9 pin Belton pcb (printed circuit board) tube sockets with non dedicated pin-outs
•  The board can accommodate any 9 pin tube
  •  EL84/6BQ5, 12AU7,12AX7's/ECC83’s etc 
  •  Can be used for preamplifiers – guitar and HIFI 
  •  Can be used for a full mono block 
  •  OR any project needing up to three 9 pin tubes 
•  Boards can be used for 'hybrid' designs (semiconductor/ tube) 
•  The boards are 7.75 inch by 4.75 inch - that's over 36 square inches of prototyping space!
• Tubes are spaced 2.3 inches centers to accommodate larger power tubes
• Tubes sockets can be mounted on either side
•  6 holes (0.150) for rigid board mounting 
• Includes nylon board mounting hardware nuts, bolts, washers and spacers 
• Two bus tracks 0.1 inch wide for heaters/filaments
• All other tracks are either 0.01 or 0.02 inch wide most with 0.03 inch minimum clearances
• Sixteen non dedicated buss lines for power B+ etc which can be interconnected
• Top ground plane for low noise connected to bottom peripheral ground plane 
• Ground planes joined top and bottom with 0.030 spacing to tracks and pads
• Minimum pad to pad spacing of 0.15 to allow for larger components used in tube circuits
• The larger pad holes 0.059 allow for large component lead diameters
•  Includes 0.1 inch pitch pads and interconnects for semiconductor IC's All holes are plated through
• Can support 8 (eight) 8 pin DIP (Dual in-line Package) devices
• 80+ power buss solder pad connections
• 350+ small component mounting pad connections
• 300+ large component mounting pad connections
• 80+ tube pin out pad connections
• 70 ground pad connections
• 10 heater pad connections
• Nearly 1000 component mounting holes
• Tracks join connection pads on both sides of the board for improved connection integrity
• Solder masks on both sides to minimize solder splashes
• Components can be mounted on either side of the board
• Can be used for point-to-point wiring instead of solder tag strips
•  Easy to de-solder

See our 8 pin octal prototyping/project boards. They can easily be used in combination to build a complete amplifier for mono blocks, stereo or guitar amp.