The Full Process of my WCH Electronic Bell Circuit Board Replacement 

It’s a Type 3 speaker, not a Type 1

@@thetexanrailfanner3371 So the speaker determines the sound? I thought it was the board that did it.

@@OxnardLocalRailfan nope, the board adjusts the volume and rate, the speaker makes the sound

@@thetexanrailfanner3371 Interesting. Do you think it's possible to buy a specific model speaker from WCH

@@OxnardLocalRailfan well, you can’t get the Type 1, 1.5, 2, or 3 from WCH because they don’t make them anymore, they only have the Type 4 speaker