Model A Horn

Have a T converted to 12 volts. It has a Model A horn on it that needs to be rebuilt. Spins but no sounds. Can anyone recommend where I can send it to be rebuilt?[LIST]

Original Model A horns were 6v. If your horn is an original, I'm not sure how long it will last with a lot of use driven at 12v. My experience with these old horns is that that they are simple - small electric motor driving a shaft with a vibrator on the end that runs over a corrugated surface producing noise that is amplified by the trumpet.<P>If you are even slightly mechanically inclined, these old horns are fairly easy to bring back to life, especially if the motor turns at speed. Most have some sort of adjusting device at the back or internally that adjusts the tension of the vibrator arm on the corrugated surface. Adjustments are usually very sensitive and it may take a little trial and error to get it to work. Also be sure that the bearings are lubed and the motor bush contacts are clean and adjusted so they make good contact. You may have to replace the springs that load the brushes. If brushes or springs are wearing, NAPA usually has an assortment box. Doing it yourself, you can save some money and have a little fun too! [img]images/icons/grin.gif" border="0[/img]

[ThomasBorchers]

There are a lot of new (not original) A-Horns around and mostly you can adjust them like this: Remove the front cover with the five or six small screws and nuts. Be careful that the diaphragm doesn't drop on the floor. In the diaphragm is a screw. If you turn it a bit in it should hit the thing at the motor (ratchet) which produces the sound. Often it takes a bit time to set these horns because you can only adjust them if you have removed the front cover. <BR>The original horns will be adjusted behind the back cover. Lose the screw and remove the cover. Near to the center you can find an adjusting screw. Push the horn button and turn this screw to the left or right until your here the ahaooogh! Sometimes the modern A-Horns have a nut at this place but normally you can't adjust them there. <BR>If the motor is spinning you should be able to adjust the horn.<BR>Good luck!<P>Tom