Have 2 Ford original battery 6V horns in nice shape but after hours of attempts to adjust so they work correctly, I give up. Who can I send these to that can adjust them ?
The trick is when you're putting on the back cover...don't over tighten it, just snug the screws. Sometimes (most times really) tightening those screws flattens the diaphragm so you get no sound or weak sound.
Ed can you post some pictures of the horns??
they may be help full for giving you assistance.
We adjusted ours by loosening the lock-nut, backing off the adjusting screw until the armature was no longer making contact with the diaphragm, and then SLOWLY turning in the screw until we got just the right tone. The adjustment of our horn was very sensitive... less than a screwdriver's width in or out prevented the horn from sounding.
(Message edited by windy on June 08, 2016)
Typically the point mounting is all screwed up by previous owners. The Battery horn operates properly when the point mounting position is in full point closed contact position with no power applied and the armature has a gap of 1/32 from the diaphragm. That is easy to set because the Plunger that strikes the diaphragm has a 10-32 thread so with no power applied you can back off the plunger adjustment until tapping on the end of it with your finger produces a click indicating that the plunger is not in constant contact with the diaphragm. Now screw it back in a small amount at a time until the click just goes away when you lightly tap on the plunger end. Notice the position of the plunger end and rotate the plunger adjustment back out exactly one turn and lock it down. Tap on the end again to make sure it does have a click. No further adjustment of that part is to be done. Apply 6V power via a battery and make sure the horn does NOT draw more than 5 amps and does "honk" somewhat. If it simply clicks and the points don't open then you need to adjust the point mounting so that when the plunger strikes the diaphragm the points do open. The adjustment is to move the points further apart if the current is above 5 amps and move the points closer together if the horn draws less than 5 amps. If you can't get a good sound then likely the diaphragm has pin holes in it from rusting. This is very common since the diaphragm was made from ordinary spring steel and water can easily come into the front end of the horn rusting out the diaphragm. Contrary to popular opinion the gaskets around the perimeter of the diaphragm are to keep out water and in fact typically do not enhance the sound of the horn. The design of the horn works much the same as a Snare drum with the diaphragm being held tight around the perimeter so as to make the center of the diaphragm a tight tension mount. Each horn is actually slightly different in tone being mechanically resonant at a slightly different pitch from others T horns.
If you can see most of the diaphragm and see holes in it then don't try to adjust it since you may wreck a chance to make it work once you replace the diaphragm. If you need a new diaphragm, the ones I make are per factory drawing and should fit your battery horn but I make them out of stainless spring steel to hopefully make them "honk" a lot longer.
Hope you have success and get that "horny" sound
email@example.com have sold & fixed hundreds of motorcycle horns in the past 20 yrs. for no more than the t horns are worth i would say just find one that works. lol. charley
Try Moonshine County Antique Auto Horns
Larry Rose is the owner
He did some work on one of my horns. Reasonable and does good work.
this proves my point about t horns, nice 26-27 on e-bay could not even get a $20.00 BID BACK ON FOR 3 19.94 ha.ha. charley
still no one bid on the bat horn for $19.95. i dont want it,i am stuck with to maney t parts now.ha,ha.charley
whats the deal $ 25.00 on an old mag but 0 on a nice bat horn.????????????????? charley
duh!!! everybody look under antique car horns, how hard is that????????????? Charley, p.s. its on e-bay
I tried, didn't find it, but found lots of other stuff!
keep looking its there 14 hrs to go, on e-bay. charley
I can't find it either!
Maybe there are no bids because it is hiding from everyone...
it is right there in antique car horns. gee do i have to give the #. i guess i will put $ 20.00 on it. cant believe an old guy that cant put pics on can find it.!!!!!!!!!! charley
Yes, that (posting the number) would be the kindest and simplest thing to do.
Thought I was lost, but others can't find it either--and being on dial-up, I spent some 20 minutes looking!
You're not lost David...
the horn is!
yea!! someone fond it i wont have to put in my junk pile that i cant sell ha,ha charley
hope it works, if not you know what to do!!!!!!!!!!!!charley