Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: joesatch on September 23, 2024, 09:44:38 am
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trying to understand what this voltage divider accomplishes also the way the tonestack is wired. never seen this
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To me, it looks like it's not part of the tone stack. It's just squeezing off a little signal. I would presume that the signal was a little too hot going into the next stage. It may also serve to knock down a little bit of high end content (maybe the tone was a little too bright?)
Dave
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The tone stack is a passive James/Baxandall. The two extra resistors just attenuate more signal. Apparently somebody couldn't handle the gain. Wimps. B-)
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To me, it looks like it's not part of the tone stack. I
Dave
Right
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what if i remove the 1M to ground? no longer a voltage divider so what would the 499K in series do?
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It still forms a divider with the volume pot, but the attenuation will be less.
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what if i remove the 1M to ground? ...
Original circuit is electrically, "A Variable Resistor you can only turn up halfway."
When you remove that 1MΩ resistor you now have, "A Variable Resistor you can turn up two-thirds of the way."