Modifying FS PA300

[Dr.Jon]

I have an older 12 pin FS PA 300 with the plastic paddle switch for horn or siren tone (rise and fall wail).
Is it possible to simply modify paddle switch for either the yelp tone or peak and hold wail?

There was a thread about 10 years ago that petered out without a real answer.

Thanks for your time.

 

[Dr.Jon]

Added photos...is it possible to run a wire from the switch (red and white wire) to the yelp position on the rotary switch (orange and white wire).

 

[shues]

What tone is produced when the paddle switch is held for several seconds in the "manual" position currently?

 

[Dr.Jon]

What tone is produced when the paddle switch is held for several seconds in the "manual" position currently?

Rise and fall wail. Thanks.

 

[shues]

I don't think I have ever seen a PA300 where the wail rises and then falls while the paddle switch is being held down when the selctor knob is in the "manual" position. The wail should only fall once the paddle switch is no longer held down and is allowed to return to the center position.

Are you able to take a video of your PA300 doing what you have described?

 

[Dr.Jon]

I don't think I have ever seen a PA300 where the wail rises and then falls while the paddle switch is being held down when the selctor knob is in the "manual" position. The wail should only fall once the paddle switch is no longer held down and is allowed to return to the center position.

Are you able to take a video of your PA300 doing what you have described?

I apologize, I misunderstood. Yes, it rises when the paddle is held down then falls when it's released.

 

[shues]

You should be able to cut the white/red wire somewhere between the rotary switch and the board, and connect it to the white/orange wire. Make certain to protect both circuits by installing two diodes, one in the white/red wire before your connection to the white/orange wire and one in the white/orange wire on the rotary switch side of your connection to the white/red wire.

 

[Dr.Jon]

You should be able to cut the white/red wire somewhere between the rotary switch and the board, and connect it to the white/orange wire. Make certain to protect both circuits by installing two diodes, one in the white/red wire before your connection to the white/orange wire and one in the white/orange wire on the rotary switch side of your connection to the white/red wire.

Thank you!

 

[Dr.Jon]

You should be able to cut the white/red wire somewhere between the rotary switch and the board, and connect it to the white/orange wire. Make certain to protect both circuits by installing two diodes, one in the white/red wire before your connection to the white/orange wire and one in the white/orange wire on the rotary switch side of your connection to the white/red wire.

I'm a rookie at this, so would a 5W 12v diode be sufficent?

 

[shues]

I don't know how much current is drawn in either circuit. Use an ammeter, or the ammeter function of a digital multimeter, to check how many amps each circuit draws. Then multiply by 14 volts to get the wattage. It's okay to select a higher wattage diode, but selecting a diode with too low of a wattage would cause premature failure.