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Double Bass Endpin Problems...

I am a student, and I own a $2900ish hybrid double bass (Carved top, laminate sides and back). It seems that often, while I am playing standing up, my endpin will get pushed in, and cause a sudden drop of my bass. Any suggestions or tips on this matter would be greatly appreciated.
 
I am a student, and I own a $2900ish hybrid double bass (Carved top, laminate sides and back). It seems that often, while I am playing standing up, my endpin will get pushed in, and cause a sudden drop of my bass. Any suggestions or tips on this matter would be greatly appreciated.

I assume you mean that you are tightening the end pin as well as you can and it's still slipping. Photos of the pin and socket? Is it notched? None of that ought to matter if you're strong enough to tighten it securely, but it might help someone to help you with your problem.

Where did you buy the bass? Can you take it back and have a luthier or tech look at it?
 
Thanks for the advice. It is notched, but the height that I need when standing does not grasp the notches. Sitting on a stool it's alright though. I can tighten it as far as it will go, but still, it does slip occasionally.
 
You could file your own notch with a 1/4" rat-tail file.

Or you could just fix the problem with money ... and get a decent endpin fitted.

None of the endpins in the following pic worked properly. All horrid.

Link Removed

Some of the basses that these were removed from, had damage from suddenly dropping when the endpin screw gave way. It's much cheaper to replace an endpin than to fix a broken tailblock!
 
For a temporary fix, I suggest a small stainless steel hose clamp and some bicycle innertube rubber.

In addition to adding a notch, the OP may need a new collar and set screw if the threads are stripped in the existing collar.
 
You could file your own notch with a 1/4" rat-tail file.

Or you could just fix the problem with money ... and get a decent endpin fitted.

None of the endpins in the following pic worked properly. All horrid.

Link Removed

Some of the basses that these were removed from, had damage from suddenly dropping when the endpin screw gave way. It's much cheaper to replace an endpin than to fix a broken tailblock!

+1