geo huete

Headwaters

MODS for 5150 II / 6505+

These are my combined mods for the II/+ version. The lead channel is the same as the first 5150/6505 except for three capacitors and a resistor. The clean channel is completely different, using a separate 12AX7 rather than swapping out circuit values inside the same gain structure.

Disclaimer: DO THESE MODIFICATIONS AT YOUR OWN RISK. YOU SHOULD KNOW HOW TO WORK SAFELY ON HIGH-VOLTAGE CIRCUITS BEFORE ATTEMPTING THESE. I will NOT provide support for DIYers doing these mods, so please do not ask. I developed them myself (they are not a knockoff of Voodoo or FJA, which I have never heard nor seen in person), and I’m posting them for informational purposes. If you need help, I can do these mods for you affordably.