MooseFET Line Preamplifier PCB

Our long awaited single ended MOSFET design is now available!

Our MOSFET line stage sonically resembles a single ended triode design with similar FFT frequency spectra due to the special design. A great way to have a "tubey" sound with the convenience of solid state.

1.5mm thick FR4 laminate, single sided. Board measures 148mm (5-13/16") long by 90mm (3-1/2") wide. Board is also designed to drop into a PAS preamp as a solid state replacement for the linestage circuit (tone controls not available and the addition of a 24VAC supply required).

Documentation for this board can be found here.

** Extras **

- LM317T - $1.25 USD/ea. with purchase of PCB.
($1.75 USD/ea. w/o purchase of PCB.)

- Matched Pair (matched for Vgs) IRF710 MOSFET for this board - $3.00 USD/pr.
(Matched pairs can't be purchased seperate from board [we have too few]. While supplies last.)

- TO-220 heatsink trio - $3.75 USD/trio.

- TO-220 insulating pad, shoulder washer and hardware set - $3.00 USD/trio.
($4.50 USD/trio. if purchased w/o PCB)

- Trimmer set (1 x 100R, 2 x 5K) - $3.00 USD/set. when purchased with the board.
($3.75 USD/set. if purchased w/o PCB)

Valve Heater/Filament Regulator with Soft Start PCB

Eliminate heater/filament hum and noise quickly and easily with a regulator!

Getting the rubbish out of a heater supply in a sensitive, low level audio stage, especially those with direct heating, is now simple and quick with this board. Soft start circuitry eliminates the turn-on surge with conventional DC regulation and simplifies design over a CCS heater supply.

1.6mm thick FR4 laminate, double sided with plated through holes. Board measures 97mm (3-13/16") long by 43mm (1-11/16") wide.

Documentation for this board can be found here.

** Extras **

- LM317T - $1.25 USD/ea. with purchase of PCB.
($1.75 USD/ea. w/o purchase of PCB.)

- LM338T - $2.50 USD/ea. with purchase of PCB.
($3.00 USD/ea. w/o purchase of PCB.)

- TO-220 insulating pad, shoulder washer and hardware set - $1.00 USD/set.
($1.50 USD/set. if purchased w/o PCB)

- Bourns 3296W-1-101LF trimmer - $3.00 USD/ea.
($3.50 USD/ea. w/o purchase of PCB.)

Power Line Filter PCB

You never know how much noise you had in your system, until it's gone!

This power line filter PCB is based on a famous commercial brand, but allows you the flexibility to customize it for your specific needs at a fraction of the price of the commercial unit and can be added to existing projects or commercial equipment with ease.

1.6mm thick FR4 laminate, single sided. Board measures 118mm (4-5/8") long by 39mm (1-1/2") wide.

Documentation for this board can be found here.

UNIAMP Driver PCB by Peter Millett

Universal Driver amp boards made from Mr. Millett's origional artwork.

1.6mm thick FR4 laminate, double sided with plated through holes.

Schematic in PDF can be found here and information on this design can be found here. Sold in pairs (required for stereo).

Design is © 2001 Peter Millett, Wheatfield Audio LLC and used in accordance with his terms found at the link above.

Octal PCB Sockets for this board can be found here.

N and P channel Constant Current Source/Sink PCB

By popular request, we have created a high performcance, versatile constant current source/sink PCB based on a hybrid of bipolar and MOSFET technology for a combination of the best of both worlds.

Two circuit configurations are available on each board - simple CCS for most applications or high performance CCS for the more demanding audiophile or instrumentation application (see documentation).

The board is made of double sided 1.5mm FR4 with plated through holes. It is drilled to accept #4 screw (nylon preferred for protection against shorts) for mounting. At 56.1mm x 32.5mm (2-7/32" x 1-9/32"), it is small enough to add to many projects, or upgrade existing equipment.

Preliminary documentation for these boards can be found here.

Please specify CK-34 (N-channel sink) or CK-35 (P-channel source).




Save $2.50 with our Experimenter Set: four CCS boards (2 x N-channel and 2 x P-channel):

CK-7 Tube Gain Stage and Buffer PCB and CK-26 Tube mu-Follower PCB

The CK-7 PCB is a grounded cathode triode amplifier circuit, DC coupled to a cathode follower stage for low output impedance. Great for making line drivers for your projects or a line stage preamp.

The CK-26 PCB is a mu-follower circuit that extracts maximum gain from a tube stage and provides a cathode follower output for low impedance.

Both boards are suitable for use with popular tubes, 12AU7/ECC82, 12AT7/ECC81, 12AX7/ECC83, 6CG7, 6FQ7, 12BH7 and many more dual triodes! The CK-26 can be used with the 6DJ8/ECC88 and 6922/E88CC.

Component values not given below in the scematics, as it will vary with the tube used. These should be determined ahead of time via existing designs, simulations or breadboarding.

The boards are made of single sided sided 2mm FR4. It is drilled to accept #4 screw. At 75.5mm x 50mm (3" x 2"), they are small enough to add to many projects, or upgrade existing equipment.

Schematics for the boards here: CK-7 and CK-26.

Please specify CK-7 (Tube Gain Stage and Buffer PCB) or CK-26 (Tube mu-Follower PCB).

9-Pin Minature PCB Sockets for this board can be found here.

Octal Vacuum Tube Experimenter's Prototype PCB

Create projects the professional way with these printed circuit boards designed specifically for tubes!

The board is made of single sided heavy duty 2.4mm glass/epoxy laminate for resistance to repeated thermal cycles. It is drilled to accept either PCB mount minature sockets or chassis mount sockets on standoffs with extension wires for the pins.

Room enough for mounting components on board with multiple pads to each pin, or have header pins connected for extension to a breadboard. While the board does have heater pads for pin numbers 7 and 8, they could easy be led out for different assignment.

There is a place for two solid state constant current sources/sinks for making long-tailed differential pair circuits, or active loaded gainstages, or even a parafed power amplifier.

Not your regular flimsy PCB, this thing is built like a tank!

Documentation for these boards can be found here.

Octal PCB Sockets for this board can be found here.

Octal + 7-Pin Experimenter PCB

Octal or 7-pin minature tube experimenter PCB with pads for 2 CCS.

2.1mm thick FR4 board measures 101.5mm x 89mm (4" x 3.5"). Great for single tube line stages or a phase inverter.

This board is basically 1/2 of the Octal Experimenter PCB above with a 7-pin option. Documentation for the Octal Experimenter PCB is valid for this one as well.

Octal PCB Sockets for this board can be found here. Sorry, we do not stock 7-pin PCB sockets.

Octal Vacuum Tube Power Supply PCB

Very versatile power supply PCB for your tube projects!

Created by CK Amps for heavy duty musician use, we have been authorized to distribute these for the hobbiest and DIY experimenter crowd.

The board is made of heavy duty 2mm glass/epoxy laminate for resistance to repeated thermal cycles.

Plated through holes are spaced to fit high voltage snap-in caps and radial leaded caps. Resistor pads will fit 1, 2, 5 and 10 watt resistors, as well as lead-out for chokes. Tube socket pads will fit most PCB mount octal sockets. Diode rectifier holes are large enough for the 3A barrel type as well as 1A mini's.

Not your regular flimsy PCB, this thing is built like a tank!

Documentation for these boards can be found here.

Octal PCB Sockets for this board can be found here.

9-Pin Vacuum Tube Experimenter's Prototype PCB

Great quality next generation hobbiest board!

The board is made of double sided heavy duty 2.4mm glass/epoxy laminate with plated-through holes for resistance to repeated thermal cycles. It is drilled to accept either PCB mount minature sockets or chassis mount sockets on standoffs with extension wires for the pins.

Room enough for mounting components on board with multiple pads to each pin, or have header pins connected for extension to a breadboard. While the board does have heater pads for pin numbers 4 and 5, they could easy be led out for different assignment.

There is a place for four solid state constant current sources/sinks for making long-tailed differential pair circuits, or active loaded gainstages, or even a parafed power amplifier.

Not your regular flimsy PCB, this thing is built like a tank!

Documentation for these boards can be found here.

9-Pin Minature PCB Sockets for this board can be found here.