External car horns how to tune them

[sftamx1]

I misplaced my horn tuning instructions, so can anyone help with tuning these beauties? I have tuning skills, just need the interval and how to adjust. Thanks.

[CarlLaFong]

You can tune a horn but you can't tuna fish

 

[sftamx1]

So funny, so helpful. So old, right up there with the overused  "it'll buff out"😆 

Edited July 31, 2022 by sftamx1
Added to (see edit history)

[Bloo]

On any of them you are adjusting the tension on the mechanism or diaphragm. If you don't see an adjuster sticking out of the flat bottom toward the ground, then it's probably hidden under those domed covers. My guess is the domed covers have a screw in the middle holding them on. Someone else will have to come up with the interval.

[Mark Shaw]

Vintage Car Restoration - Klaxon Horn - Will it work??? - Bing video

 

[sftamx1]

Mine are new. I don't think they are Klaxon... they are an entirely different type of horn,  and they are a pair. They work great!

Edited July 31, 2022 by sftamx1
More explanation (see edit history)

[Bloo]

If they are new there could be anything inside there. On this one below, there is right at the center a threaded shaft that apparently goes to the diaphragm. There are 2 nuts there in the center, presumably an adjuster and a jam nut. It might be important to hold the second wrench solid so you aren't twisting things up too much. The tension on the mechanism and the diaphragm probably all gets changed together. On something more modern I would expect them to move the adjuster off to the side somehow.

 

 

[Porsche 68]

I have the same horns on my34 dodge got the passenger side working but can’t figure out the driver’s side someone’s been in there before the wiring is sketchy gotta find a diagram