That Old Cast P3 Horn is just heavenly, and is always a childhood memory from my past!

I like that the old cast sounds like a direct relative of the M3. I know it’s the successor to the M3, originally blowing the same chord with less air and maintenance. I can’t help but picture SP whenever I hear a new cast. Well done comparison, thank you!

I love the P3. As I live in California yes, it was Southern Pacific that used these and you could always tell what train you heard just by the horn. Amtrak and Santa Fe each used a different horn. The notes are an A major chord in second inversion; C sharp, E, and A

Thanks putting this together. Feel very lucky finding old cast P3's on ebay last week, testing, sounding great! Looking forward installing them.

Old cast p3 sounds good, thanks for taking my request!

The N5s we have on the Norristown High Speed line have the new cast P3s with all diaphragms facing forward. Real attention getter as these are one of the loudest horns I've ever heard on SEPTA and the sound can carry far too like the K3LAs on the Silverliner Vs. I think NS 4030 has an old cast one which I saw on an Ethanol train today in Bridgeport PA and boy was I stunned by the beauty of the sound.

Excellent vid my friend (love the sound of trains),

I live near a line that was served by PRR! Your so lucky you are near northern Pacific's old line!

One thing I like about the P3's as I like both of them. OC has that more deeper mellow tone though. Good compare and contrast video.

Matt, guess what, thanks to your help and knowledge, I decided to get a P3. I'm getting it from Tom Aker. I talked to him on the phone and he gave me a great deal. I'm getting it all bells forward. Can't wait to get this horn. He told me a RS5T would be a lot of maintenance and also need a lot of air. Also the diaphrams go bad fast where as a P3 is less maintenance. Also he said all 3 bells will still sound at 70psi. Now that's cool. Just had to tell you.

I remember the old cast P3 horn very well Also Denver and Rio Grande Western Just when was the transition of old cast to bew cast I first recall new cast P3 about December 1983 Rio Grande

That old cast P3 is absolutely beautiful, sounds just like an SP horn even though it's in an NP configuration (might be the same). I'd definitely take the Old Cast's A Major inversion over the New Cast's odd hybrid chord

Personaly i thinl the new cast P3's fit the C44-9W pretty well

New Cast's seem harsher, but they sound a lot more like SP compared to the Old Cast's.

NP's setup sounds softer than SP's, it's especially noticeable on the Old Cast where it almost sounds muffled compared to SP's new or old cast horns. The New Cast does have more of an edge like SP, but it still has a noticeably lower sound.

Nice

Southern Pacific used both of these. Really miss hearing the Nathan P3. The 3rd generation Nathan K5LLA sounds very reminiscent of this, but with more notes.

P3’s 4 LIFE!!!

2:51 Dennis uses Nathan P3 horn from Sodor Diesels With American Horns

The old cast is so much better. One of our SW1200’s has one and it’s literally the best thing ever.

My P3, which has the manifold for 3 horns, what railroad used this design and also what year were they made? Also what railroad used the configuration of a all bells forward P3?

Too bad that we can't hook up together. I have an actual old Southern Pacific Railroad Crossing bell that came from the Colfax, CA area. I caught up with a Union Pacific worker installing an electronic bell, and taking down the old bell. I bought the bell. So I wish I could make a video of the new p3 cast horn with the crossing bell combined together, to make it sound like a real SP train coming down the line. I am building a Southern Pacific layout in HO scale, and wish I had recordings of both the crossing bell and horns together, because of the old Athearn locomotives I have (rough engines sound like real ones) it would make my layout come to life! Thanks for the video, but I wish you had some P3 SP Nathan horns, coming and going sounds, without voices, or talking, so I can enjoy just the horns. I could possibly combine your video sounds with my bell, to make it sound like a real train!

You Should Also Do A Combination Of The Nathan P2 & P3 Bells If You Have A P2 Horn

I was meaning, play two horns at once like a double mount contraption

I am having trouble identifying a bolivian locomotive horn, persumably it is a Nathan P3 without the high pitch bell. Maybe you could help me finding out.

That New cast P3 sounds like BNSF 6899

As an engineer on the ATSF Joint Line, Denver to Pueblo, we operated BN engines/trains as well. Th BN horns were horrible sounding, they had an irritating squeak to them. Do you know what type horn this was?

Could you do a combination of a P3 and RS3L?

Is it just me, or is the New Cast P3 more aggressive sounding than the Old Cast?

They dont rly sound that different. But the new cast sounds alot better to me

What pressure are you running in this video?

Sounds like Southern Pacific

Where do you get parts for these?