pedal fades out after a couple minutes of playing

[RWOOD1]

:shock:
help-my umble clone fades out after a couple of minutes. sounds great before fading, j201's all biased at 4.5 volts any ideas?

[R.G.]

Fading out is always one of two things:
(a) heating up moves something to a condition where it can't work
(b) a capacitor charges up (or down) to a condition where something else is not biased right.

You almost certainly have (b).