The Siren Board

Posted: **Sat May 27, 2023 6:48 am**

al66class59 wrote: ↑
Fri May 26, 2023 11:32 pm

Eclipse DDS wrote: ↑
Thu May 25, 2023 6:28 am
Although it does have some similar features to a Castle Castings siren, due to the overall look of the siren I’d say that it is a Secomak of some kind (I can’t remember the exact model).
I'm 99% sure it's not a Secomak as it doesn't have chamfered (angled) stator holes, which Secomaks almost universally do. This narrows it down to CC or Carter, as it quite clearly isn't a Gent

Eclipse DDS wrote: ↑
Thu May 25, 2023 6:28 am
I say this because the base of the siren is not curved like a Castle Castings, but rather more angular, like a Secomak. The wire junction boxes also seem to be situated at an angle to each other, similarly to a Secomak.
Earlier Castles also had squared bases. Could be a Carter, but pretty sure they always had centralised motor junction boxes, which this one doesn't. That said, there aren't many Carters left to use as a reference, so don't quote me on that.

The thing that makes me doubt myself is that it doesn't have the stereotypical "giant" rotor bolts that CCs often do, instead having the flatter bolts as you'd see on Carters. Heater junction boxes are only angled/pointing upwards because the museum/whoever restored the siren refitted them at a funky angle!

Eclipse DDS wrote: ↑
Thu May 25, 2023 6:28 am
The wire junction boxes also seem to be situated at an angle to each other, similarly to a Secomak. The only thing that may be confusing is the lack of the word ‘Secomak’ on the heater, however if it is a Secomak I’d probably go with the theory that they had to replace the heater and didn’t bother adding the wording onto the new component.
FYI, the Secomak-lettered "heaters" you refer to were just end plates - to protect the rotor sides - and didn't have heating capabilities. Heaters typically didn't have letters on, no matter what they were attached to, as they were (to my knowledge) a standardised component that could fit numerous models of siren.

So it's either a Carter with a very late-production motor, or a CC with different rotor bolts. I could go and forensically analyse the rotor vanes for further clues, but a lack of reference photos may hamper that!

Ah, thanks for the information. I’m not too familiar with British sirens because as you said, there isn’t too much documentation on them. This actually cleared up a lot of incorrect information in my head, so thanks for that

Posted: **Mon Jul 10, 2023 10:55 pm**

This servers probably dying but I’ve still got some more.
(53.1075617, -1.3670844) There’s a secomak GP12 somewhere in this approximate location
https://youtu.be/SMONUQbIZL8

Posted: **Mon Aug 07, 2023 5:43 pm**

I’ve got an interesting one for you all. I found a image of a sound study from klaxon of a ES siren system for a refinery, now I know it’s the Pembrokeshire Refinery, so have at it and try locate all of them

: IMG_3142.jpeg (117.64 KiB) Viewed 286921 times

Posted: **Thu Aug 10, 2023 5:26 pm**

Eclipse DDS wrote: ↑
Thu Feb 16, 2023 9:17 am

BusBedford87 wrote: ↑
Wed Feb 15, 2023 10:19 pm

Eclipse DDS wrote: ↑
Wed Feb 15, 2023 4:05 pm

Will do. That reminds me, I forgot to say this before but the Chapelcross ex-nuclear power station tests its Klaxon GP6 on the first Thursday of every month. Also, it might just be me, but when I recorded it (the file of which I don't think that I am permitted to share, I had to gain official security clearance to do so), it sounded like there were 2 sirens on the site. It may have just been the main siren echoing, but the windup just seemed very distinct.
That surprises me that it’s not allowed to be released. If the siren can be heard from off site, which presumably it can as it needs to fulfil its function as an outdoor warning device and warn neighbours and residents beyond the plant boundaries, then what’s to stop me from recording it from off site, say in a field or something?

Official security clearance seems logical, but I’m not sure why they wouldn’t want people to know what the alarm sounds like.
Yeah, I did ask about the whole no photography thing, and they said that it is because there is still some important stuff on-site. The place used to be used to make nuclear weapons, after all. I think that you are allowed to photograph the site, but just not in proper detail, as in not close up. Honestly, I am not too sure about whether I would be permitted to upload the recording here, so I will ask the staff again at some point. Another slightly confusing point is that fact that you can see into the site relatively clearly on Google StreetView, which obviously goes against their policy, but I don’t know. There is a LOT of signage around the site warning of criminal fines if photos are taken, so they don’t take this kind of thing lightly.

So yeah, I will ask the staff about the recording again.

The photography rule only applies if you are within the boundary of the nuclear installation, there is nothing stopping you from taking photos from the road as the photography rule doesn’t apply to you. They cannot enforce site rules to a member of public outside their site. You can take photos and videos of anything that you can see from a public place. Now I wouldn’t suggest going to a nuclear installation and recording all access and egress points of the site as that would undoubtedly raise concerns but a video of the siren wouldn’t be too bad compared to what I’ve just said.

Posted: **Thu Sep 14, 2023 9:55 am**

Ok so,

The roof mounted screamer in torpoint that people call an s10 looks more to be an s5. I go to the bus stop opposite often for work and tend to observe it. I have no clue if it works, nor do I know if it is connected to any type of system. If I had to guess, I’d say it might’ve been used as a wake up call maybe? Or to signify a certain time in the day? I do know that it was given in a deal between ACA and Klaxon (although I think the other 2 sirens that were given were removed sadly).

I’ve spent a bit of time scouring the internet to find something that tells what its used for but didn’t find anything. Definitely sure that its not connected to the devonport sirens.

The shape looks more like an s5 though. Hope it stays there since its a extremely rare sight in the uk.

Posted: **Thu Sep 14, 2023 8:06 pm**

Found a potential new siren at Grangemouth. Btw I'm working on my own version of the UK siren map with more locations but feel free to add this to the official one

Posted: **Fri Sep 15, 2023 5:09 pm**

HazzaCyclone710 wrote: ↑
Thu Sep 14, 2023 8:06 pm
Found a potential new siren at Grangemouth. Btw I'm working on my own version of the UK siren map with more locations but feel free to add this to the official one

Doesn't look like one when you move further up the road.

not_a_siren.PNG

Posted: **Wed Sep 20, 2023 9:12 am**

BritishLSSystems wrote: ↑
Mon Oct 18, 2021 10:18 pm
i think i found the siren on top the SRC (Submarine Refit Complex)

take a look and see, thats the only siren-like shape there

I can tell you that this is a Secomak CS8.

I have a friend that works in the dockyard and he has confirmed it.

Posted: **Wed Sep 20, 2023 2:44 pm**

I would quickly like to bring to attention that there may be/have been a siren situated in Longtown, Carlisle. I have heard reports from some of my family members that they remember hearing one sounding when they were in the town, and from what I gather, this was relatively recently (within the last 30 years or so). I am not personally going to be devoting hours of time looking for this siren, but I wanted to bring it to attention for anyone who is more willing to find it.

Here is the town's location:
55.00995032642556, -2.966685277127862
https://www.google.com/maps/place/Longt ... ?entry=ttu

UPDATE:

Ok, so I did end up doing a little bit of searching. It turns out that MOD Longtown does have some emergency sirens, and there certainly are some siren-like shapes on-site. I will try and gather more information on the site's siren(s?). However, I do think that there may be some other warning sirens off-site, but I am unsure.

Helpful booklet mentioning the siren:
https://cumbria.gov.uk/elibrary/Content ... 581193.PDF

As of now, all I know is that there is at least 1 siren (referred to as the 'Site Emergency Siren' in the booklet) on-site, and that it is tested every Wednesday at 9:30 AM.

This might be something:

: Screenshot 2023-09-20 175354.png (1.52 MiB) Viewed 286621 times

https://www.google.com/maps/place/54%C2 ... ?entry=ttu

Posted: **Thu Sep 21, 2023 6:06 pm**

Digisirran wrote: ↑
Fri Sep 15, 2023 5:09 pm

HazzaCyclone710 wrote: ↑
Thu Sep 14, 2023 8:06 pm
Found a potential new siren at Grangemouth. Btw I'm working on my own version of the UK siren map with more locations but feel free to add this to the official one
Doesn't look like one when you move further up the road.
not_a_siren.PNG

Ah damn it, but i still think that area must have sirens sonewhere

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