George @GeoPeg there’s nothing wrong with your hearing.
David @David Johnston there was some dried lubricant in the grease box which I removed and replaced.
Here’s what I’ve done.
I had ordered new brushes, springs and bottom bearing from Jeff Kane. Installed and made no difference. Verified there were no housing leaks and that there was good air flow out of both whistle ports.
Based upon George’s comment about only hearing a single tone I pursued that idea.
Here is a video of what I found....no tone from the bottom port.
Next I disassembled the whistle.
As you can see the housing was clear of any debris. Next I took measurements of the whistle port openings. The upper one measured 3/16” wide.
The bottom one measured 1/4” wide.
Inspection of the impeller and gasket looked good.
The end result was the same as the “as found” video. I can only assume that there may be a casting flaw/wear in the bottom port such that the air is blowing out and over the flute and is not producing a whistle sound due to its opening size or defect.
In the mean time I placed the second housing that I have which had nail holes punched in some of the windows. I drilled several holes in the upper eve area which are not visible with the roof on and that side is facing into the layout.
Here is the end result
Any additional ideas or pictures of whistle body castings would be appreciated. For now I will use it as is, the grandkids enjoy it anyways. I will be on the lookout for another body this October in York...hopefully.
