The Ford Barn

40coe · 07-01-2024, 12:08 AM

Wanting to rebuild my early horns. Does anyone have information on the capacitor value, point setting, etc.

highbeams · 07-01-2024, 12:20 AM

all horns are the same 'til the early '50s. Even the long trumpet horns in the late '40s. The make-up is the same I've discovered 20+ years ago, using parts from a late '40s trumpet horn to replace parts in my '36 pickup horn. (dual '36 pickup horns; one was 'shot'.)

Terry,OH · 07-01-2024, 07:38 AM

The points are normally closed with no power on the horn and open when the solenoid picks up. There is no setting suggest slowly adjust the set screw until you get the sound you want and then lock it down with the lock nut.

40coe · 07-02-2024, 01:54 PM

Good info, Thanks.
Still hoping someone has the information for capacitor and resistor values. For sure the capacitors need replacing.

koates · 07-04-2024, 03:14 AM

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Capacitor value on Ford Sparton horns is .2 mfd 400 volts. If it has a wire wound resistor instead of a capacitor then it should be 3 ohms. This information is out of the Sparton horn service manual. Most original horn capacitors by this time are faulty. I have repaired several horns and used new capacitors which make a big difference to the sound of the horns. Regards, Kevin.

07-01-2024, 12:08 AM	#1
40coe Member Join Date: Mar 2024 Location: Nordland, WA Posts: 82	Rebuilding 1936 horn? Wanting to rebuild my early horns. Does anyone have information on the capacitor value, point setting, etc.

07-01-2024, 12:20 AM	#2
highbeams Senior Member Join Date: Dec 2014 Location: California Posts: 961	Re: Rebuilding 1936 horn? all horns are the same 'til the early '50s. Even the long trumpet horns in the late '40s. The make-up is the same I've discovered 20+ years ago, using parts from a late '40s trumpet horn to replace parts in my '36 pickup horn. (dual '36 pickup horns; one was 'shot'.)

07-01-2024, 07:38 AM	#3
Terry,OH Senior Member Join Date: May 2010 Posts: 5,394	Re: Rebuilding 1936 horn? The points are normally closed with no power on the horn and open when the solenoid picks up. There is no setting suggest slowly adjust the set screw until you get the sound you want and then lock it down with the lock nut.

07-02-2024, 01:54 PM	#4
40coe Member Join Date: Mar 2024 Location: Nordland, WA Posts: 82	Re: Rebuilding 1936 horn? Good info, Thanks. Still hoping someone has the information for capacitor and resistor values. For sure the capacitors need replacing.

07-04-2024, 03:14 AM	#5
koates Senior Member Join Date: May 2010 Location: Melbourne Australia. Posts: 2,218	Re: Rebuilding 1936 horn? Sponsored Links (Register now to hide all advertisements) Capacitor value on Ford Sparton horns is .2 mfd 400 volts. If it has a wire wound resistor instead of a capacitor then it should be 3 ohms. This information is out of the Sparton horn service manual. Most original horn capacitors by this time are faulty. I have repaired several horns and used new capacitors which make a big difference to the sound of the horns. Regards, Kevin.