Boat horn wiring.

[Tony Brooks]

Actually I have seen one or two old positive earth steel boats well perforated and in both cases they were repaired and converted to negative earth. I have not heard or seen about the same on properly wired  negative earth boats. I suspect those old boats posed a solution risk if they sank so maybe the BSS has not got round to  modern practices.

[Jen-in-Wellies]

6 hours ago, Ray T said:

Don't bother with all this electrickery business get one of these: 

I have something similar made by Acme Whistles.

http://www.acmewhistles.co.uk/xcart/product.php?productid=131&cat=5&page=1

Loud it is. Much more so than the weedy Halfords car horn. Easy to grab and let fly without searching around for the horn button. Mines a semitrad, so the switches are a distance from the steering position.

Jen

[WotEver]

 

[Robbo]

1 hour ago, Jen-in-Wellies said:

I have something similar made by Acme Whistles.

http://www.acmewhistles.co.uk/xcart/product.php?productid=131&cat=5&page=1

Loud it is. Much more so than the weedy Halfords car horn. Easy to grab and let fly without searching around for the horn button. Mines a semitrad, so the switches are a distance from the steering position.

Jen

I have the same one, it's a deeper tone than the sample sound they have on the site.  Loud indeed it is, and seems well made.

[Ray T]

Whilst the horn being blown by Audrey Harper is a bit squashed it may have been a railway shunters horn.

I have a similar one stamped LNER.

But to add  confusion the third photo is from the Hooge Crater Museum at Ypres. http://www.hoogecrater.com/en/

Edited June 27, 2017 by Ray T

[Dr Bob]

8 hours ago, Ray T said:

Don't bother with all this electrickery business get one of these: 

That's what I am using. N'owt to go wrong and its loud if you blow hard enough.