Decot 10/16 port in Perfect Pitch (Audio)

[Archon]

Here is a noon recording of a Decot 10/16 port that is in perfect pitch. Recorded 4-19-2007 11.55am Princeton WI. This Decot was rebuilt some 15 years ago using a Low slip Dayton 10hp 3 phase motor. Normal Motor's on decots were 12hp Valley-Electric High Slip. This is the 2nd siren I have heard that is in perfect pitch the other was a 2T22.

To answer the high ver low question. Before the 50's Due to REA restrictions High slip motors were used because they draw less current than low slip and Rural electric has captiacty issures back than

http://media.putfile.com/Princeton-WI-Decot-Noon

[Thunderbolt 612]

Wow! That's possibly the best recording of a 10/16 Decot I've ever heard!

[JasonC]

Joe, is this a Decot?

http://www.youtube.com/profile?user=nmfd72

[SirenMadness]

Joe, is this a Decot?

http://www.youtube.com/profile?user=nmfd72

That's an HOR siren, I think.

[PhRed]

It indeed is. From Massapequa LI.

I think all (?) Decots have a basket-like housing.

[Archon]

The HOR 7/10 siren was possiblty made by ACA. ACA Did make some of the HOR sirens

[Daniel]

Somewhere I saw an up-close photo of that 7/10 siren in Massapequa from someone on the roof, and it is indeed an H.O.R. They seemed to like that interval.

What does high slip and low slip refer to?

[Robert Gift]

Here is a noon recording of a Decot 10/16 port that is in perfect pitch. ...

What do you mean by "perfect pitch"?
To what does high slip and low slip refer?
High slip means less electrical coupling and therefore less amperage draw?
Low slip means more efficient electrical coupling, therefore more initial amperage draw, which may stress the Rural Electric Association system?
Thank you,

[JasonC]

Slip speed is the actual RPM loss of a rated motor under a load. For example, A large 3 phase motor may be rated at 1800 rpm, but under a moderate load, may only achive an rpm of 1730 or so. High slip means the motor is a lot slower than its actual rated rpm under load, low slip means its not. And as you can guess, a higher slip motor won't pull as many amps as a low slip. Thats back in the days of 2400v distribution and crappy 5KVA transformers; the power grid just couldn't handle loads like that.

[RedAlpha]

Joe, is this a Decot?

http://www.youtube.com/profile?user=nmfd72

That sounds really scary.