thebigcheese wrote:
yoni wrote:
Mosfet or Silicon? Cuz one is a lot cleaner than the other.
Are we talking about the boost or the overdrive? I thought the Mosfet and Silicon were for clipping for the overdrive section. I can check again, but I didn't think it made much difference when I switched between them with just the boost on.
We're talking apples & oranges here. When Yoni refers to MOSFET and silicon here, he's talking about the transistor that you used to build the boost section, outlined in green on the diagram on page 33 of the instructions, not the diodes or MOSFET's used in the clipping section (in red on that page). Depending on which transistor you chose to use--BS170 MOSFET or MPSA18 bipolar silicon, the character of the boost is altered. The MOSFET boost has a cleaner, sparklier sound, while the bipolar silicon gives more output and a bit of distortion of its own at higher gain settings. Also, depending on which transistor you chose, some of the other components in that section should be different, as described in the instructions.
BTW, any boost, no matter how "clean" (i.e. undistorted) its output, is potentially capable of driving an amp's front end into preamp distortion, depending on how it's set up. A lot of players use boosts for exactly that purpose. What's clean coming out of the boost doesn't necessarily mean it will be clean from the speaker.
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