The bottom horn on the mobil directo is the air intake for the chopper, the top horn is the sound projector.

The 3rd siren is a Scream Master siren made by La Verne company R.J Zievers. Came in either 6/8 or 9 ports. Only one recording has caught of these going off and it’s the single-toned one. They also made fans to prevent crops from freezing and they made a dual-horn siren in Merced.

@SylvesterTheSupernatural

2 ай бұрын

Is the Merced unit still there?

The Mobil director on the roof was a rare gas powered one!

The one the veterans building is a b&n mobile directo, that one does spin, it is also particularly special because its a b&n 48G model which is Gas powered by a Wisconsin vf4, v4 (4 cylinder v lay out) engine, that one is missing the top horn, but the bottom is the intake, the "blower" on the back is the fan to cool the motor, there is a running one on Jerry wicks channel, he has the only running version in the world. The second one is electric so it has 2 tones. But the 2 tones come out of the same top horn

Still coming back for more! Great content as always! 😊

Looks like you had a fun adventure!

@Arden56-nation

11 ай бұрын

Oh my goodness your everywhere

@sirensofsoutheasternlouisiana

10 ай бұрын

​@@Arden56-nationOh my goodness nobody asked.😊

@Arden56-nation

10 ай бұрын

@@sirensofsoutheasternlouisiana they are

@sirensofsoutheasternlouisiana

10 ай бұрын

@@Arden56-nation Okay and?

@Arden56-nation

10 ай бұрын

@@sirensofsoutheasternlouisiana No

On the Mobil Directo the bottom is for the chopper intake and the top is for the sound output

For the Mobil-Directo (precursor to the ACA Allertor), the bottom horn is the intake and the upper horn is the output.

@MarcBookPro

Жыл бұрын

It's also worth noting Mobil-Directo's came in gas and electric variants. The first one you pictured was gas-powered and the last one was electric.

@MarcBookPro

Жыл бұрын

@jerry wick on KZread is currently rebuilding and restoring a gas-powered MD. This is the first one known to be depicted on the internet.

@DayTrippingAdventurer

Жыл бұрын

Great information. Thank you!

@someengineermain6803

Жыл бұрын

​@@DayTrippingAdventurerand most bn44e's (electric version of the bn54) have 10/12 port choppers like the 500 shtt (some 500 shtt's have 10/12 port choppers there's one in Topeka Kansas) and the bn54s have 8 port choppers

@jaxThesirenandcountrylover

2 ай бұрын

Not all bn44s AR 10/12 (bn44 in Memphis TN is 8 port single tone not former bn52/54)

the 2 siren is an aca allertor with engine and the uper output cut of

Las angles had 3 mobil directos but one of them is removed, and 2 remain. The one you see in this video and there is one ontop of a building somewhere without the horn on the top

9:26 both tones would have come out of the top horn. Some sound also comes out of the bottom horn due to the pressure changes caused by the rotor chopping air into sound.

Mobil directo is a bn52 or bn54 which is gas-powerd and it does rotate

the first mobil directo was gas powered unbelievably rare

The sound projector on the Mobil Directo has been removed. And yes, it rotates 360⁰. Or would if it was active.

5:18 mobil directo. And it's missing the projector horn on the top

Great trip with some great sirens ! I saw Connor's video and it was a great one, he also climbed a Model 7 in it. What's great about the 3 sirens you've seen is that they're all different: you've got both the gas-powered single tone version and the electric dual tone version of the Mobil Directo (the one on the roof of the Veterans Memorial Park was the gas-powered one), plus a Scream Master, a siren only made for California in the 50's ! They do look like Federal Signal sirens, probably because Scream Master also installed FS sirens and made siren poles. There's both a single tone and a dual tone version of the Scream Master, however I don't know which one you've seen. As of how does Mobil Directo sirens work: the air goes in the bottom hole, gets chopped by the chopper, and gets out by the top "horn", they've then taken the same design for their following model called the Allertor. If you want to hear them going off, here are some links to: - a gas powered single tone Mobil Directo being restored: kzread.info/dash/bejne/omyMo66jmL2qkbA.html - an electric dual tone Mobil Directo on a fire station in Pennsylvania going off (and it rotates too fast because apparently they've put the belts wrong after a maintenance check): kzread.info/dash/bejne/n5WflqWEdavFqKg.html - an abandoned single tone Scream Master going off in Sacramento, probably after some malicious act done to it, this is the only footage available of a Scream Master "screaming": kzread.info/dash/bejne/q42H1dyth8XPdbw.html

@DayTrippingAdventurer

Жыл бұрын

Great information as always. I was curious about them being gas powered and it would make sense that the one on the pole would be electric, would be tedious to keep maintaining and fueling it up on that pole. Thank you for the links, as I suspected, they did spin. The Scream Master has been retrofitted with an electric speaker, like a public address system, but looking at the photos it looks like it still has the guts inside, unlike the retrofits they did to the SD-10s downtown.

@nicodimatteo

Жыл бұрын

@@DayTrippingAdventurer you’re gonna have to do some Hawaii sirens because after all there are federal SD 10 sirens in Hawaii, and also another type of siren eows612 Los Angeles

That last Mobil directo you looked at might have the rare 12/10 port configuration…

@DayTrippingAdventurer

Жыл бұрын

Interesting. How can one tell from just looking at the outside?

@thatkidfromsmartsville2012

5 ай бұрын

@@DayTrippingAdventurerBecause most of B&N’s Mobil Directo’s that used electric motors were 10/12, while some of the gas powered ones were 8 port. Might be a converted unit.

The siren @ 9:20 is a Mobil derecto

Looking back on this video I noticed that the Scream-Master at 7:35 is the extremely rare, never heard, dual tone model. It was 6/8 port.

@TheOfficialDorianelevator

6 ай бұрын

oh my god after you told me i noticied it

It’s a gas powered mobile Director

@DayTrippingAdventurer

Жыл бұрын

Looking at the photos I can totally see that the one on the roof of the Veterans Memorial Building is gas powered and the one on the pole is not. Interesting that they had the two designs. Wonder how much of a difference gas vs electric made?

@theericfreeze4498

Жыл бұрын

@@DayTrippingAdventurer correct, I think the gas was sposed to be more powerful but there was not a huge difference, I could definitely say that the Mobil Directo on veterans memorial building had a Greater range because it was so high up but not just because of the gasoline engine but it probably increased the volume by a few db.

@dwaltjj

Жыл бұрын

@@liamwaldrup That's what makes Los Angeles so interesting in my opinion in regards to sirens, it seems like they just sort of walked away from them and you can find all sorts just weathering away on roof tops and poles all over the place.

@Sirenlover2016

10 ай бұрын

Btw.its missing it's blower

@PalmPeakMarketing

10 ай бұрын

@@liamwaldrupthere’s three in California that exist

That siren is a B&N Mobile Directo Gas Powered siren

1st siren looks like a fun alarm clock lol also the 3rd siren is called the “scream master” it was made by a company also called scream master the sirens were was made in California at around the 1950s

@sth-1081

Жыл бұрын

the scream master was not made by the D.E.W. scream master was it's own company before they stopped. Decot sirens are these-kzread.info/dash/bejne/ppuV2MOuoajHkdY.html

@railfanbb4223

Жыл бұрын

@@sth-1081 ok

Oh Boy I haven’t seen you from a while also just to give you a reminder of how about siren walk #4 that Fedelcode on that little wooden stand on that Native American fire station building that Fedelcode Has now been painted red.

The first md was missing a horn piece

The one with the really thick pole is a Scream Master

B&m mobil directo are similar to ACA Allertors

Great video just found your channel. Walking tour videos are a great way to see the city. Are the air raid sirens still in use like for earthquakes etc?

@DayTrippingAdventurer

6 ай бұрын

Welcome! The sirens I'm visiting are no longer in use. I believe there's only one original siren in use on Catalina Island for Tsunami warnings. They're installing a new electric system for Tsunami warnings along the coast. Only thing they're using these old sirens for is show and entertainment, they removed the guts from a bunch downtown and put speakers in them for a War of the World event several years ago.

very nice tour man! and there's not to many gas powered directos left. there are 2 in san bernadino tho.

@DayTrippingAdventurer

Жыл бұрын

One day I'll venture beyond Los Angeles proper to see what's out there in the wilds.

@sth-1081

Жыл бұрын

@@DayTrippingAdventurer cool! my old town of San Jose also has a Civil defense system consisting of Model 5's SD-10's and Scream masters.

@nickpaul844

Жыл бұрын

There’s a guy that restored a BN52G

@sth-1081

Жыл бұрын

Ik his name is jerry wick.

@JerryWick

Ай бұрын

​@@sth-1081yup

Good old CD yellow

We are back! Awesome!

@DayTrippingAdventurer

Жыл бұрын

Yeah, took me long enough right? Hopefully I'll get out more. Thanks for watching!

@desertsirens

Жыл бұрын

@@DayTrippingAdventurer Haha no worries!

That was a scream master

@DayTrippingAdventurer

Жыл бұрын

Yeah, after reviewing the footage at home I realized, that other than it having some conical features, it looks nothing like Model 7. I tend to go on these journeys with minimal research so I can have an honest reaction to what I see. So, thank you for confirming what it is I'm seeing!

To me it reminds me of a submarine parascope.

Quick correction for you: It is not said as “Mobile” it sounds like “Mo-bill”

@DayTrippingAdventurer

Жыл бұрын

Thanks for the correction, I was actually not completely confident with my pronunciation of the thing.

Mobile directos are HUGE

Would be awesome to find a Chrysler Air Raid siren

@theericfreeze4498

Жыл бұрын

Definitely looking forward to that video.

@warningsirensofmichio9660

Жыл бұрын

There's a couple in Washington but la is pretty much all federal signal and a few ACA sirens

@thatkidfromsmartsville2012

5 ай бұрын

@@warningsirensofmichio9660There is some in Los Angeles, especially the one in Compton

V4 Wisconsin gas powered Mobil directo

You are going to find a scream master I found 29 siren

The mobil directo does have a secondary horn at the top but it seems that It fell off A long time ago Due to the bolts Rusting off And their motors are usually exposed and are gas powered they come in 10/12 ports Or 8 ports And supposed to be the ancestors of the ACA Allertor 125 An And if you search up Mobil directo Or allertor you would know what it looks like with the secondary horn At the top and they spin really fast

@JerryWick

Ай бұрын

The gas powered unit were only offered in single tone 8-port configuration. All electric ones were dual tone. The only way you will find a single tone electric is if it was a converted gas unit

M9p

This guy don't win in the what is this science it's an mobil director

The mobil directos are rip offs of the aca allertor in my opinion

@thatkidfromsmartsville2012

5 ай бұрын

The Mobil Directo came first, then the Allertor replaced it using the same design. They are both made by the same company as Biersach & Niedemyer became ACA, then ASC in the 90’s - 2000’s.

@JerryWick

Ай бұрын

​​@@thatkidfromsmartsville2012close but not quite. The Allertor and Mobil Directo are totally different designs. The only thing they share is the projector shape