Can the Old Fashioned Sound "Ooga" 12V Air Horn that Harbor Freight has on sale for $10.95 be converted to 6 volts in a reverse engineering manner similar to the 6 volt starter being upgraded to operate at 12 volts?
The HF horn is a motor driven diaphragm horn, not a compressor type. I believe theirs is a permanent magnet type motor which cannot be revised to 6V operation. The original Model A motors had wound fields and no magnets.
simple answer is not directly.
However if you are able to find a step up transformer that will bring the 6 volts up to 12 volts it could be done but it would be cheaper to find a 6 volt horn on ebay.
Give it a shot as is. I had one. It's not bad. Might take a half a sec longer to crank up fully on 6 vts. but I used it untouched. Hell it's only free wheelin'.
G.R. Them step up DC transformers are rare as chickens teeth!
If you are asking about those red plastic horns, they don't really "oogah" as much as "bark." I tried one on 6V hoping to slow it down so that it would sound more like "oogah," but the sound was still more of a barking noise. The "oogah" comes from the old motor winding up to speed and then slowing back down when power is removed. The modern permanent magnet motor is fast and instant start and stop, so no "oogah," it's more like "ooog."
G. R. - step up transformers only work with AC voltage.
Jeff, I did not know the new ones were plastic.
The ones sold a few years ago were all metal.
That is the type I was asking about, as it seemed I repaired one that led me to believe it could be converted, but I did not make or save a wiring diagram.
OK I meant converter but my electrical knowledge is limited.
J C Whitney used to sell these in both 6 and 12 volt. At the time I thought they were cheaply made, but the plastic ones are even of cheaper construction!
I mentioned in an earlier thread that you can create a 12v supply for LED's by adding a small second 6v battery in series. The same trick would work for this horn. Try the horn with a modern car's 12v battery. If you like the sound, get one of these little 6v batteries, and put it in line between the horn switch and the horn.
I went through three of those Harbor Freight cheapies and finally gave up. I bought an old fashioned one and it has been working ever since.
Also when installed near the exhaust stack they can melt.
Many of these "new" old sounding horns draw more amps than those little converters provide.
Save some grief...look at the power requirements of one of those horns before you buy it or the converter.
And the saddest part is that the literature you can read on the 'net does not tell you...you have to read that on the package!
Thank you but I was aware of that. Don't know what happened to the rest of my post ,only that link showed up. That was part of a response to a earlier post about converting 6 to 12 volts. but I see that has since been resolved