Jeffers_S13
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| posted on 23/6/05 at 10:56 AM |
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Horns not working properly
My horns seem to oscillate between each other when operated. Each one works fine on its own. I have an earth and a power feed that Ive split and
routed to each. What have I done wrong ? ? ?
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Bob C
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| posted on 23/6/05 at 11:47 AM |
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It just COULD be that both are operating perfectly at nearly the same frequency so the sound cancels, then reinforces at the deifference between the
two frequencies. This would give an "oscillating" sound envelope. It can happen - honest!
Bob
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tks
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| posted on 23/6/05 at 11:53 AM |
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use 2 relais??
wy u use 2 the same??
if you make the output hole from one a bit different you are done..
it will increase decrease air speed / pressure and change sound..
else you could use 2 relais
they never come up at same time..soow the start of the horn will be different
Tks
The above comments are always meant to be from the above persons perspective.
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Peteff
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| posted on 23/6/05 at 12:00 PM |
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You need to fit a relay or dump one of them. There's not enough power going down the wire to sound them both at once.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Jeffers_S13
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| posted on 23/6/05 at 12:41 PM |
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I have one relay powering them both, you think I need to put 2 relays in ? bit of a bummer as the feed wire is all nice and neatly shrouded all the
way to the front.
Can I just ditch one ? I thought (for whatever reason) that horns need to be twin tone.
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David Jenkins
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| posted on 23/6/05 at 01:13 PM |
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One relay should be fine. You can use thin wire to switch the relay on, and thick high-current wire to drive the horn.
Pete's point is valid - do you have thick-enough wire to drive 2 horns? They take a LOT of amps and they may be struggling.
If the wire is thick enough, you haven't got a horn that's out of adjustment, have you? Try each one separately and tweak it if it sounds
a bit croaky (there's usually a screw in the middle for tweaking).
Otherwise just use 1 horn for the SVA, and save the fiddling for later.
rgds,
David
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Jeffers_S13
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| posted on 23/6/05 at 01:25 PM |
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They both work fine on their own. I guess the wire isnt up to the job then, although its pretty heavy stuff.
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David Jenkins
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| posted on 23/6/05 at 01:36 PM |
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Wire them both up together temporarily and connect them directly to the battery - just a foot or two of good thick wire. If they work well in that
situation then your wiring is suspect.
The trouble with a long run of thin wire is that the high current required for horns will cause a large voltage drop, and the remaining volts may not
be enough to operate the horns properly.
Just a thought - once you've tried the horns out of the car, run a temporary length of thick wire in parallel to the existing one (just lay it
along the chassis) from the relay to the horns. If the extra wire (and reduced resistance) allows the horns to sound correctly then the solution is
easy...
David
[Edited on 23/6/05 by David Jenkins]
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splitrivet
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| posted on 23/6/05 at 03:54 PM |
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Sounds like youve wired the 2 of em in series instead of parallel.
Cheers,
Bob
I used to be a Werewolf but I'm alright nowwoooooooooooooo
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Hellfire
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| posted on 24/6/05 at 12:39 AM |
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quote:
Originally posted by splitrivet
Sounds like youve wired the 2 of em in series instead of parallel.
Cheers,
Bob
I was going to say the same or have you used the same earth and connection is dodgy?
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Jeffers_S13
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| posted on 24/6/05 at 07:01 AM |
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I have split the feed and ground wires and put one from each to each horn, Ive tried each pair on their own on each horn and both work OK, its just
when I connect both at the same time.
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tks
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| posted on 25/6/05 at 12:49 PM |
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uhhh
how do they look?
to each other??
rotate the claxon.. for example one facing forwards the other downwards...
isn't it possible that the vibrations of one make other switch one switch off etc..??
regards,
Tks
The above comments are always meant to be from the above persons perspective.
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RazMan
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| posted on 25/6/05 at 11:21 PM |
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Could be 'sympathetic resonance' if they are in the same harmonic range ............. bloody hell, did I just say that?
Try reversing the polarity of one of the horns (if they don't use chassis as earth of course)
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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