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Discussion Starter #1
These are the TCA versions that came out centuries ago. PS-1 operating system, I installed a BCR to replace the very, very old white battery. One thing about the conventional PS-1 locos, they are very powerful and had good sounds for that era. Anyways, in action with a grain train on the Seattle & Yakima RR.

Bill

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Those PS's and PA's are such good looking locomotives. Not at all like F3's and F7's with their stubby little nose.

If I were modeling North America I would have several of those PS and PA locomotives.
 

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Please help to cure my ignorance. I have never heard of an Alco PS-1 locomotive. I googled them and found this site which supposedly lists all types of diesel-electrics that Alco built, but doesn't have any PS-1s.
https://en.wikipedia.org/wiki/List_of_ALCO_diesel_locomotives

Can someone explain the differences in the PA versus the PS?

And yes, I think the PAs are exceptionally fine-looking engines!
 

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Discussion Starter #5
Please help to cure my ignorance. I have never heard of an Alco PS-1 locomotive. I googled them and found this site which supposedly lists all types of diesel-electrics that Alco built, but doesn't have any PS-1s.
https://en.wikipedia.org/wiki/List_of_ALCO_diesel_locomotives

Can someone explain the differences in the PA versus the PS?

And yes, I think the PAs are exceptionally fine-looking engines!
PS-1 is just the type of operating system that MTH used in its early years. PS-1 was replaced with PS-2 and PS-2 was replaced with PS-3. Has nothing to do with real deal Alcos.

Bill
 

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Can someone explain the differences in the PA versus the PS?
Bill explained what the PS (MTH's Proto-Sound)stood for and the different variants of Proto-Sound. PA was Alco's model designation for the locomotive. They also did a FA, which looks nearly identical. It's just shorter and has 4 axles instead of the PA's 6 axles.

 

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Nice PA’s. Relegated to freight service...something different for a change!

Tom
 

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I have a set of RK PS1 Rio Grande Alco's. I really like them. Sound is a bit "tinny", but sound really isn't my thing anyway.
 

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Seayakbill and Maxum, thanks for the answers. :smilie_daumenpos:
 

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Nice PAs Bill.
 

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Why the longer nose on the PA's vs. the F series? Did they find that they just look better or is there some machinery or generators or batteries stored in the longer nose?
 

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PAs were made by ALCO, F units by EMD. The ALCO freight carbody unit, the FA, had a similar nose to the PA. The EMD passenger carbody units, the E series, had noses virtually identical to the F units starting with the E7. The earlier EA-E6 models had longer slanted noses.
 

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Thanks.:thumbsup:
 

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Discussion Starter #17
These PA Alcos from Williams are some of my favorites.

Bill

Any more info on the Williams? I have a F7 ABA set with QS1 (or PS1) added on.
Millstonemike, the Williams by Bachmann PA;s has the True-Blast sound card which is very boring. I have a set of the Williams Western Pacific ABA F-7's with the QS1 from many years ago, much better then the WBB True-Blast.

Bill
 
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