Quote:
Originally Posted by Gee
Also from memory the GA-5 has no 1M resistor from the input to ground. That was an error in the early Gibson schematics that got carried forward.
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Not an error. When you plug your guitar in, it's resistance to ground takes the place of that grounding resistor. Gibson factored that in. As long as you are using a guitar, you're fine. If you plug in a mic for harmonica, it can cause big trouble with runaway gain.
So for harp players, a 4.7 meg resistor should be installed from the input to ground in vintage GA5s and in these new ones. For guitar, the input should be left as is.