Noll TCM 3 Volume issue

Any of you use this same preamp?

Let's say volume goes from 1 to 10 on the volume pot, when you turn the pot, only from 9 to 10 go get volume, less than that there is no volume at all.
It came with a Linear Taper Volume pot, so thinking it was the pot I replace it with an Audio Taper Volume pot. Same result.

I just want to know if this is normal with this preamp or there is something defective.

It came prewired, but when I replaced the pot I did follow this diagram:

http://noll-electronic.de/files/a25_tcm3_wiring_diagram.pdf

Thanks!

Larry

 

250k just like the stock one, still the original and the replacement are the same value and I get the same result.

 

I will thanks!

Larry

 

Correct.

 

The preamp came prewired with all pots, 250k Linear from stock.