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With minor exceptions myTrip Top is complete. I spent a week troubleshooting an audible Ticking sound, about one every second. The 1k/10w cement resistor had an internal fault. I changed it out with a 1k/20w I had and the isssue finally disappeared. I initially thought it was noisy tubes. I finally found three preamp tubes that are dead quiet. You can hardly tell that the amp is running.

The tubes used are a NOS GZ34 (Mullard), EL37 pentodes (Mullard), 5591 (RCA red base), two 6SL7 NOS Phillips.

My bright switch on the cascade channel doesn’t work and I need to change the bias range resistor. With the EL 37 tubes my bias pot is at the limit and I can only get 37ma, when I used NOS 7581a I was able to get my 40ma. I’d like to get to 40ma. Other than those issues the amp is ready.

All pots were upgraded to Allen Bradley and most of the resistors are the red metal film 1w PRP resistors.

You've found great NOS preamp tubes (Mullard GZ34, Phillips 6SL7) that operate very quietly.
geometry dash lite

This is certainly not an easy process
tunnel rush

Your amp build is impressive! Replacing the faulty 1k/10W cement resistor with a 1k/20W was a great fix, eliminating the ticking sound. The NOS tube selection (Mullard EL37 and GZ34, RCA 5591, Phillips 6SL7s) and component upgrades, like Allen Bradley pots and PRP resistors, ensure top-notch performance.
For the issues:
Bright Switch: Check wiring, solder joints, and the switch itself with a multimeter.
Bias Resistor: Replace with a slightly lower-value resistor to achieve 40mA with the EL37 tubes.