Intonation Alto sax consistently flat/out of tune

[altoman]

Also, it's not an old sax. It's a Jean Paul AS-400 I got from their website.

 

[Colin the Bear]

It's the front F key.
It probably fell off because the rod unscrewed itself. Probably nothing to do with a bump.
The saxophone will play perfectly without it.
Earlier horns didn't have it and some players remove it to save fudging it and squeaking.
Put it somewhere safe and the next time your horn is in for maintenance it can be refitted. Did you find the screw/rod? Keep that safe too, if you have it.

So, now we know what fell off and it has nothing to do with tuning, grease up the cork and push the mouthpiece further in.

 

[mizmar]

Front F?too slow

 

[altoman]

@Colin the Bear Thank you. I took your advice and my sax is back in tune. I think the issue was that I don't grease the cork often enough, so I couldn't push the mouthpiece far enough back to fully tune my sax.

 

[Colin the Bear]

Little and often. In fact, just a touch, every time.

 

[Dr G]

@Colin the Bear Thank you. I took your advice and my sax is back in tune. I think the issue was that I don't grease the cork often enough, so I couldn't push the mouthpiece far enough back to fully tune my sax.

Be aware that if the cork is terribly tight and requires a hard shove to get sufficiently far on the neck that you can sand down the diameter of the cork.