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  • Pentode vs. Triode - The Gear Page
    In many amp designs, triode mode (screen tied directly to plate) is noisier because in triode operation the power tube is more sensitive to power supply noise The relatively poor filtering in guitar amp plate supplies leads to noisy triode operation
  • Triode Mode Hum - The Gear Page
    In triode mode, which is not a feature of the SR, the screen grid connects to the plate, therefore, the same dirty supply as the plate That requires a a closer balance on the part of the other tube in the circuit to ensure that the higher ripple on the screen in this mode is cancelled out in the OT primary Click to expand
  • Pentode Triode switch - The Gear Page
    Does having a pentode triode switch on the power section of an amp really half the wattage? depends on the amp my juke warbler sounds great in triode mode other amps, not so much warmer looser spongier somehow, the juke doesn’t sound muddy or dull in triode like some amps really nice
  • Computing Input Impedance in a Triode Gain Stage - The Gear Page
    For starters, computing input impedance for a triode gain stage seems relatively straightforward as a practical matter, the value of the grid resistor determines the input impedance of the stage
  • Balanced triode? - The Gear Page
    Balanced DC triodes do seem to make a difference in the resulting plate voltages on the PI As most of us know, if one half of the signal clips sooner than the other, which is the result of unbalanced plate voltages, the amp will break up sooner Not to say that this is necessarly "bad" since some ears may prefer this
  • Amp buzz in pentode mode but not triode mode? - The Gear Page
    My Hiwatt DC40 has a buzzing noise in pentode ("full volume") mode, but the noise is not present in triode ("half volume") mode What could be causing this?
  • The Gear Page
    The Gear Page
  • Triode USA: AVOID - The Gear Page
    This is what happened I ordered a Classic Tone PT for a new build on June 14, paid with my credit card They don't have PayPal Days later I tried contacting them because I was not receiving any shipping information Called several times to their customer service line and nobody picked up So I
  • Gain stage questions - The Gear Page
    These values will keep the gain the same as it was in the original circuit with a single triode, but the advantage is that you will have lower background hiss (which is important for high gain amps) To reduce hiss even further, I would actually reduce the grid stopper to say 10k (for the parallel triode version)
  • My Derek Trucks tone set-up recipe - The Gear Page
    If you're going to do the Triode Pentode thing, do yourself the favor of never flipping the switch with the amp turned on, not even on standby That mod connects the power tube's screen to its plate; having live voltage on either will put stress on 6L6 screens that they weren't designed to handle, and will shorten tube life no matter how large





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