For the PFA-5, insert the red banana connector into the red socket, and the black banana connector into the black socket on the PFA-5 case.

These leads are already screw terminal attached to the PFA-4 amplifier.


Connect metal tubes to the red and black alligator clips. Just connect at the end of the pipe. The ends of the pipe have been left open to make this very easy for us.

This type of connection has be used to cope with accidents. If someone is to trip over the leads or place too much pressure on the leads and tubes, then the connection will simply come appart, avoiding damage to other connectors and the amplifier.

Now Let's Set The PFA Switches

We have two switches here to set
• We select the SQUARE/AUDIO switch to SQUARE

• We select the AC/DC switch to DC

When you switch the ON/OFF switch, you will see which way the switch goes to select the function. The switch is set to the label.

Turn the power knob fully clock wise to full power

Great! We are now ready to go.

Run FreX and output a frequency under 1,000 Hz

Make sure the metal tubes are not touching

Turn the PFA amplifier ON

Use the tips of your finger and place one finger on the black tube and the other finger on the red electrode. You should feel a tingle sensation. If not, hold both tubes in your hands. The red electrode in the right hand and the black electrode in the left hand. Set a frequency around 500 Hz, you should feel this now. If not, check the power dial is set fully clockwise.

Adjust the power dial to a level where you just can't feel the tingling. Sometimes you can do this by how hard you hold the tubes. This also provides a way of regulating the power and comfort of the frequency signal.

You are now ready to run a FreX program.

The power you may feel will change from frequency to frequency. The higher the frequency, the lower power is delivered to the tubes. At frequencies above 2,000 Hz, you will probably be able to have the power at full and not feel much at all. This is normal operation and the signal is still going very well to the body.

I will have more instructions on setting sine waves via the microphone channel here soon.

Contra-Indicators

Do NOT use PFA Series under the follow situations

On anyone who wears a Pacemaker and or Defibrillator.
5Hz or lower must not be used while driving a car. Could fall asleep.
On anyone who has Phlebitis
On anyone who has Thrombosis, especially 10Hz (dissolves blood clots)
On anyone who has not had several weeks of good healing after surgery.
On anyone who has suffered a stroke.
On anyone who is pregnant.
On anyone who suffers from Epilepsy and convulsions.
On anyone who has a Psychotic disorder.
On anyone with heart problems, especially 1 Hz
Do not use electrodes in hands with programs longer than 1 hour. If wanting to run a long session, use foot basins.

Changing Batteries

The AA batteries should provide many hundreds of hours operation. But should be changed when the Power On LED becomes dim and/or the signal degenerates in the FreX oscilloscope when under load. The 9 volt batteries on the PFA-4 will require changing after about 20 to 30 hours of use. Recharable batteries are okay to use.

Switch OFF

Unscrew the 4 stainless steel screws and carefully open the lid.

Remove the anti-static sponge which is used to wedge the battery cases away from the electronics.

Slip out the 12 x AA batteries from their compartment and replace new ones. The negative end of the battery connects to the spring end.

When replacing the cover, make sure the battery cables and terminal connector are clear of the sides of the enclosure, to avoid crimping the power leads.

The PFA-4 is pretty straight forward. Just unplug the 9 volt batteries and attach new ones.

IMPORTANT

When installing new batteries, it is important they are of the same type and same charge, otherwise the signal will be effected.

Changing Battery Configurations

PFA Series requires a dual battery power supply. This means there needs to be three leads connecting to the PFA Series battery terminal connector.

You will need two identical battery sources.

As you can see with the included 12 x AA battery system, I have used two battery containers that hold 6 x AA batteries each.

To install a 6 volt system, two double AA battery holders would be required.

To get your zero volt reference, you attach one plus (red) and one negative (black) wire together, and this is zero volts and connects to the terminal with the green lead (0).

The other battery red lead connects to the red terminal lead (+3 volts) and the remaining black battery lead connects to the black terminal lead (-3 volts).

To install 12 volts, the same set-up is used as above but with 8 x AA batteries in two holders of 4 x AA batteries in each.

It is important you get these connections right. If you connect the wrong power source to the terminal connector, you may damage the amplifier.

CAUTION

DC 18 volts will cause skin burns on some people.

It is recommended the supplied configuration of 18 volts be always used and regulated via the power control knob. You may need to reduce power for frequencies under 1,500Hz to make it more confortable.

Two audio leads are hardwired to the PFA-4 and 5. These audio leads have a 3.5mm stereo connector attached. These connectors are used to connect to your computers sound system and microphone connectors.

The 3.5mm connector with the cable tie connects to the computer sound out port. In notebooks this is often called the headphone output or speaker output.

The 3.5mm connector without the cable tie is the microphone channel. This lead connects to the computer/notebook microphone port for signal monitoring. This is optional and you don't need it to run the amplifiers. It is just a handy signal feed-back option.

Most new notebook computers will have power management systems in place, and often these are set ON to provide extra battery life. When you output a frequency in FreX, and if you notice the oscilloscope display starts well, but then after a second or two the signal automatically drops off, then you will need to find the audio power management tools in your windows set-up and turn off all power limiting controls. You may also need to check the "Boost Microphone channel" in the audio section set-up.

If the FreX oscilloscope display is jittery and spiking, and not displaying a good signal under 700Hz, then check that the microphone lead is inserted all the way into the microphone connector on you PC or notebook.

The microphone port on your computer has a capacitor installed to protect the electronics from DC surges and power sources. This capacitor will make square waves look like they have a slant on the top of the wave form.

However, you can rest assured your PFA series is outputting excellent square waves.