Stabilizer PCB Construction

Please note that the pictures below are Version 1 of the stabilizer with salmon pink boards. You will be building the Version 2 boards. There are minor changes between the boards, but the locations of all the parts will be the same.

Inside the polygons are all the resistors and capacitors.

The 2.2 mfd capacitors around the CA3140 have been changed to 2.0 mfd. Put the two capacitors that are square and marked 205 in those locations.

On the new board, there is a 2.2K resistor above the T1-1T transformer, do not install this resistor.

Use a Volt-Ohm Meter to double check resistor values. The proper placement of the 4.7 meg resistors is very important. A lower value will prevent the stabilizer from working.

Capacitors

Quantity	Type	Value
12	Disc	.01 (.0068)
	Non-Polarized, Tantalum
2	Non-Polarized	2.0 mfd Mono/Film
1	Tantalum	10 mfd (3 pin)
	Electrolytic
1	Electrolytic	330 mfd

Install the 7805 regulator, two diodes, one LED, T1-1T transformer, and 32 MHz oscillator.

Transformer Core/Oscillator/Regulator

Quantity	Type	Part Number
1	1:1 Transformer	Mini-Circuits T1-1T
1	Oscillator Can	32 MHz
1	5 Volt Regulator	7805

Solder the ICs, transistors, CA3140 op amp, and the MOSFET to the PCB. IC sockets are not included with the kit, but may be used if desired.

Active Devices

Quantity	Type	Part Number
1	MOSFET	MPF131
1	NPN Transistor	2N3904
1	PNP Transistor	2N3906
1	CA3140	Op Amp
2	74HC4020	IC
1	74S74 (74F74)	High Speed IC

Connect wires between the "Q", the "P", 12 Volt and 5 Volt boxes.

There is a wire between the 12 Volt boxes, it just got perfectly hidden by the other wires in this picture.