Search found 97 matches

by FS150HZ
Thu Jan 10, 2019 6:54 pm
Forum: Locomotive Air Horns
Topic: Metra K5LA horns
Replies: 3
Views: 840

Re: Metra K5LA horns

Flat 4A bells are standard on K5LA's nowadays. And they were fairly common even back into the late 70s. Even die cast bells tended to vary in pitch fairly dramatically from production line to the next up until the Micro-Precision era. All of this happening was most likely by chance. The K5LA sound y...
by FS150HZ
Wed Oct 10, 2018 3:38 pm
Forum: Locomotive Air Horns
Topic: Horn Sound Notes
Replies: 16
Views: 2117

Re: Horn Sound Notes

A little late, but I'll jump in. Frequencies may be impossible to determine from recordings, but chord structures often can be closely determined. I included a recording of a single chime file I got from Nathan's website. If you go into Audacity, or whatever program you have, you can make dozens of ...
by FS150HZ
Thu Sep 27, 2018 2:56 am
Forum: Locomotive Air Horns
Topic: Possible prototype K5? - Alberni Pacific diesel
Replies: 19
Views: 2652

Re: Possible prototype K5? - Alberni Pacific diesel

I want to say I'm surprised, but I'm not. My experience with Canadian railway museums is most simply don't care about the horns. Much like most class 1-3 roads, as long as it works, that's all that matters. The point is I guess is they essentially traded away a horn with a market value probably arou...
by FS150HZ
Thu Jun 28, 2018 6:46 pm
Forum: Locomotive Air Horns
Topic: Casting Questions
Replies: 10
Views: 1534

Re: Casting Questions

Check this out. https://diecasting.com/blog/2017/07/31/best-casting-process-for-your-needs/ The fact the mold was stuck to the casting suggests it wasn't prepared properly. I should've mentioned that plaster of Paris does require a fair amount of preparation. The article mentions other ways of casti...
by FS150HZ
Wed Jun 27, 2018 5:50 am
Forum: Locomotive Air Horns
Topic: Casting Questions
Replies: 10
Views: 1534

Re: Casting Questions

While I'm sure this isn't what Airchime used, you may be able to have more success with plaster of Paris. It's possible you may even may be able to cast intricate surfaces like horn chambers (not threads), but it's hard to say. I believe these molds have to be heated up first to avoid thermal shock....
by FS150HZ
Thu May 17, 2018 7:46 am
Forum: Locomotive Air Horns
Topic: 1980 Amtrak BigBore K5LA
Replies: 12
Views: 1899

Re: 1980 Amtrak BigBore K5LA

Great to hear a little cheap garage repair did the job, and it wasn't some other problem that would run hundreds of dollars. That's one of the more balanced K5LA's I've ever heard. Very smooth and melodic. If you want more loudness out of the horn, increase the pressure. Locomotives run around 130-1...
by FS150HZ
Wed May 16, 2018 11:48 am
Forum: Locomotive Air Horns
Topic: 1980 Amtrak BigBore K5LA
Replies: 12
Views: 1899

Re: 1980 Amtrak BigBore K5LA

Interesting the 3A and 4A inlets are the largest, because both bells are almost inaudible. If the set screws don't work, then you know you have another issue. Also check to make sure you have enough air going into the horn. The K5LA I had sounded similar to that when I used an air line that was too ...
by FS150HZ
Wed May 16, 2018 7:10 am
Forum: Locomotive Air Horns
Topic: 1980 Amtrak BigBore K5LA
Replies: 12
Views: 1899

Re: 1980 Amtrak BigBore K5LA

The inlet size on the bell you photographed is about 3/8". :shock: The standard air inlet size for a K bell is around 1/8", if not slightly less. The reason is for air efficiency, and as mentioned, musicality. The horn sounds pretty bad, and I'd imagine uses a bit more air. That being said...
by FS150HZ
Fri Oct 06, 2017 3:13 pm
Forum: Locomotive Air Horns
Topic: Best K5LLA Doppler I Heard - Video I Got
Replies: 3
Views: 918

Re: Best K5LLA Doppler I Heard - Video I Got

These K5LLA's had the 1L and 1 closer to 2 full steps apart, where as today's are closer to a step and a half. The two piece 1L's are generally quite flat, and played about the same frequency as a Leslie 25 bell. The 2 bell was still very sharp often, and the 3A was still sharp too. 4A's were genera...
by FS150HZ
Tue Sep 12, 2017 9:02 pm
Forum: Locomotive Air Horns
Topic: Replacement O-rings
Replies: 4
Views: 961

Re: Replacement O-rings

My K3L came with a missing gasket on the 3 bell. I bought size #15 and it fit perfectly. #14 may work, but surely it would be a much tighter fit. That might be a good thing though.

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