12v horn query

[ppc]

Can anybody identify what sort of horn I need to attach to the horn mount (pictured)? It worked fine but got lifted passing under a tree! The base is there and the wiring is in tact. The horn attaches to a female thread 19mm in diameter at there base of which there appears to be a contact. Thanks

[Tony Brooks]

I don't really understand what this si about. The photo looks like a horn, possibly with the tone plate missing, mounted on a steel bracket held in place with two cross head screws. I would expect the horn to fix to the bracket with a stud on the horn back and nut. The bracket should be spring steel but the one here looks like home fabricated mild steel or low grade stainless..

 

Any 12V horn will do and should come with anew sprung bracket. If you have a choice I would choose a low note one or a pair of high and low note but  from the looks of it I doubt the wiring is man enough for a pair.

 

 

[bizzard]

6 minutes ago, ppc said:

Can anybody identify what sort of horn I need to attach to the horn mount (pictured)? It worked fine but got lifted passing under a tree! The base is there and the wiring is in tact. The horn attaches to a female thread 19mm in diameter at there base of which there appears to be a contact. Thanks

I f you put a narrow hose clip around that threaded bit and tighten it gently to reform it, it'll probably screw back on. You could of course solder that break too.

[ppc]

To be clear, the trumpet part of the horn was pulled off and lost to the water. The question is what sort of horn should I buy that can simply be threaded on? I.e. what should I search for online? Do you know if the trumpet part can be purchased on its own, and if so will it work if screwed on and secured in place with e.g. a hose clip, as suggested? Thanks

 

 

[Machpoint005]

11 minutes ago, Tony Brooks said:

Any 12V horn will do and should come with a new sprung bracket.

Quite agree, the OP can get a serviceable horn from Midland Swindlers for about 15 squid.

[bizzard]

3 minutes ago, ppc said:

To be clear, the trumpet part of the horn was pulled off and lost to the water. The question is what sort of horn should I buy that can simply be threaded on? I.e. what should I search for online? Do you know if the trumpet part can be purchased on its own, and if so will it work if screwed on and secured in place with e.g. a hose clip, as suggested? Thanks

 

 

Ah, I see, Can you not fold up a conical trumpet from a sheet of plastic. Stick it together and stick it on and paint it black.  Thing is boat hooters really need to sound different than vehicle hooters.

Edited September 3, 2018 by bizzard

[Tony Brooks]

I very much doubt that you an buy the trumpet. In fact I am surprised to see that thread, I would have expected a swagged joint these days.

 

I doubt any readily available 12V horn is really suitable for a boat volume wise so once again - any 12V horn will do but try to get a low note one if there is an option - often marked L

 

If you don't want to buy new talk to car scrap yards.

Edited September 3, 2018 by Tony Brooks

[ppc]

3 minutes ago, Machpoint005 said:

Quite agree, the OP can get a serviceable horn from Midland Swindlers for about 15 squid.

Very good. I'll see if I can source a low note horn. Thanks for you help all. 

 

Pete

[Machpoint005]

2 minutes ago, bizzard said:

Thing is boat hooters really need to sound different than vehicle hooters.

You can have hours of fun passing through underbridges if your hooter sounds like a Transit van though.

[bizzard]

2 minutes ago, Machpoint005 said:

You can have hours of fun passing through underbridges if your hooter sounds like a Transit van though.

Or a Jaguar on the Amazon.

[Machpoint005]

Just now, bizzard said:

Or a Jaguar on the Amazon.

That's a very old joke my Grandad used to tell..

[Slim]

Or get a compressed gas horn. Boat wired for 12v one but couldn't find one i felt suited the boat. Had my gas one for 15 years , still on original gas canister. Of a morning it's tiller, pin, horn, part of setting off. Useful for alerting someone in any direction

 

[bizzard]

A trumpet could easily be folded up from a cornflake box and stuck on. If sealed well with paint it'll be surprising how long it lasts.

[pearley]

7 minutes ago, Slim said:

Or get a compressed gas horn. Boat wired for 12v one but couldn't find one i felt suited the boat. Had my gas one for 15 years , still on original gas canister. Of a morning it's tiller, pin, horn, part of setting off. Useful for alerting someone in any direction

 

We bought one last month. Ordinary horns seem to be useless in that someone standing above a noisy engine 100 yards away is unlikely to hear it. 

[ppc]

Can't seem to find one to fit a 19mm(ish) thread. Perhaps they don't make these anymore

[cuthound]

I use an Ecoblast air horn. Comes with a pump to allow you to recharge it.  Very effective.

 

https://www.tcschandlery.co.uk/mobile/ecoblast-rechargeable-air-horn/p7055

[bizzard]

A Cornetto ice cream cone could be made to fit. Available at Aldi's, 4 for 89p, strawberry, chocolate and mint flavours. You'd have 3 spares too.

[Bee]

19 minutes ago, bizzard said:

A trumpet could easily be folded up from a cornflake box and stuck on. If sealed well with paint it'll be surprising how long it lasts.

On my vintage Allegro most of the gaskets were made from cornflake boxes - most of them outlasted the car.

[Chewbacka]

11 minutes ago, Bee said:

On my vintage Allegro most of the gaskets were made from cornflake boxes - most of them outlasted the car.

I bet you put a smear of Red Hermetite on as well, worked wonders for my old Ford Escort.

[WotEver]

27 minutes ago, Chewbacka said:

I bet you put a smear of Red Hermetite on as well, worked wonders for my old Ford Escort.

Red Hermatite held my moggy Minor together. 

[system 4-50]

Contact your local hunt.  They have less use for horns than they used to and might be able to give you one.

[Iain_S]

5 hours ago, Tony Brooks said:

(snip)

I doubt any readily available 12V horn is really suitable for a boat volume wise so once again - any 12V horn will do but try to get a low note one if there is an option - often marked L

 

(snip)

A Stebel Nautilus (or one of the clones) is pretty loud, and reasonably priced.  

https://www.mx5parts.co.uk/stebel-nautilus-compact-horn-black-p-3356.html

 

[Guest]

10 minutes ago, Iain_S said:

A Stebel Nautilus (or one of the clones) is pretty loud, and reasonably priced.  

https://www.mx5parts.co.uk/stebel-nautilus-compact-horn-black-p-3356.html

 

They need a relay which can be a bit of a faff on a narrowboat.

[Tony Brooks]

9 minutes ago, Iain_S said:

A Stebel Nautilus (or one of the clones) is pretty loud, and reasonably priced.  

https://www.mx5parts.co.uk/stebel-nautilus-compact-horn-black-p-3356.html

 

I strongly suspect that the persent wiring will not be thick enough to do the job and running another pair of thick wires down the boat is likely not to be easy. maybe OK it there is a bow thruster battery that can feed the relay. Otherwise it will need a thick positive and negative wire relay or not. I note no current reading is given in the advert.

[nbfiresprite]

You can have a replacement cone made by a brass turner, but for a one off it will not be cheap.