I am stumped on Runoffgroove Professor Tweed

[whomeno]

ok built a Runoffgroove Professor Tweed from here
http://tagboardeffects.blogspot.com/2013/03/runoffgroove-professor-tweed.html

Based on the 5F2-A Princeton.

every  thing works good but when I max the master and volume out it cuts out on me.
any ideas what I could do
I used 2n5457

[GibsonGM]

Make sure your pots are wired correctly and that any breaks in the tracks are done right.  Sort of seems like a short kind of problem...short to gnd somehow when they're dimed?   Indicates to re-check all your pot wiring, IMO.

[whomeno]

Fixed changed Q1 from a 2n5457 to a j201. works good

[GibsonGM]

I wonder why full volumes make the 5457 cut out?  Maybe the input level from volume pushed it out of bias?