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09-27-2021, 02:52 PM | #1 |
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Join Date: Sep 2021
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6 volt Spartan horn on 12 volt system
I'm sure that you've been through this before but I'm new. My 6 volt horn had a small resistor of unknown size. It got toasted so my ohm meter just shows that it is open. I bought a resistor with heat sink from Snyder's for $27. It goes in the ground side of the horn. The horn motor barely turns with this installed. It sounds like a cow that's near death. W
ithout a resistor, the horn spins fast and is loud and almost sounds like it should. It leaves the "GA" out of ah ou ga. Do I leave it on 12 volts and hope the motor doesn't fry or is there a better fix? |
09-27-2021, 03:21 PM | #2 |
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Join Date: Jan 2012
Location: Western North Carolina
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Re: 6 volt Spartan horn on 12 volt system
Try adjusting your horn. There is a little screw in the back that makes a click when turned slightly in or out. Turn it one click and try the horn again. If not right try a click in the other direction. If that is not right try two clicks. Repeat until it sounds the way you like it. Then try adjusting it again with the engine running and the battery being charged.
Make sure the horn armature is bright copper and that the bearings are oiled. You can rewire the horn for 12 volts but the resistor is a lot simpler.
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A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
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09-27-2021, 03:52 PM | #3 |
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Re: 6 volt Spartan horn on 12 volt system
As said, adjust in small increments and make sure the armature is clean. I use a small scotch brite pad with a little wd40. Be sure to oil the felt pads in the front and rear. I bought a 12 volt horn from A and L. The major suppliers carry A and L horns now.
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09-27-2021, 07:17 PM | #4 |
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Re: 6 volt Spartan horn on 12 volt system
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09-27-2021, 07:24 PM | #5 |
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Re: 6 volt Spartan horn on 12 volt system
Agree with Tom, rewind the field coils for 12V.
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09-28-2021, 08:50 AM | #6 |
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Location: Rocky Mount,MO.
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Re: 6 volt Spartan horn on 12 volt system
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maybe 10 years ago adjusted it for sound i wanted its mounted inside frame havent touched since installed |
09-28-2021, 09:11 AM | #7 |
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Location: Guthrie, OK
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Re: 6 volt Spartan horn on 12 volt system
Call Snyder's and tell them the problem. They're very good to work with. There is too much resistance in the circuit - could be bad connection. Be sure the bullets are pushed all the way into the sockets; new ones tend to be very tight. Don't run the horn on 12V, it will never sound right.
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09-28-2021, 10:18 AM | #8 |
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Re: 6 volt Spartan horn on 12 volt system
When I converted to12v I rewound the horn field coils as per Tom Endys instructions. Horn never sounded better.
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09-29-2021, 09:12 AM | #9 |
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Join Date: May 2010
Location: Long Island, NY
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Re: 6 volt Spartan horn on 12 volt system
I have been running a 6V A&L Sparton Horn on 12V since 2016 and the horn's motor is fine. Adding a resistor is not the way to tune the horn's sound. Rewind the field coils is the right way.
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09-29-2021, 12:41 PM | #10 | |
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Re: 6 volt Spartan horn on 12 volt system
Quote:
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I know many things, But I don't know everything, Sometimes I forget things. And there are times when I have a long memory. |
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09-30-2021, 01:54 PM | #11 |
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Re: 6 volt Spartan horn on 12 volt system
Just add a 12 volt horn..........
swap you my 12 volt for your 6 volt. lol |
09-30-2021, 07:42 PM | #12 |
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Location: Portsmouth, Virginia
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Re: 6 volt Spartan horn on 12 volt system
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10-10-2021, 02:43 PM | #13 |
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Location: Western North Carolina
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Re: 6 volt Spartan horn on 12 volt system
I just rewound the horn field coils as per Tom Endys instructions. Horn works great. I somehow got the magnetic polarity wrong on one side but I just had to switch the wires around from the brush to the connector on one side. I greased the cam and cam follower which were dry. The lack of grease caused some wear. I had to dress the follower with my Dremel grinder.
__________________
A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
10-15-2021, 10:42 AM | #14 | |
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Re: 6 volt Spartan horn on 12 volt system
Quote:
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"There are some that can destroy an anvil with a teaspoon and shouldn't be allowed to touch anything resembling a tool." |
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10-15-2021, 11:58 AM | #15 |
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Location: Western North Carolina
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Re: 6 volt Spartan horn on 12 volt system
Good idea to mark the horn. It is obvious to any electrical engineer but maybe not so to Joe Mechanic.
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A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past. |
10-15-2021, 12:51 PM | #16 |
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Join Date: May 2010
Posts: 1,415
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Re: 6 volt Spartan horn on 12 volt system
Saw some on a club members table in Hershey years ago. Model A's, but labeled 12v. So I asked the question. Why 12V? Said they did not sound good on 6V.
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