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  • Pentode or Triode mode? - The Gear Page
    Triode mode typically has less output tube distortion, and the output tube distortion that remains has a different quality There are fewer upper, odd harmonics contributed by the output tubes, and that can make Triode mode sound either "smoother" or "darker" than Pentode mode Your DSL40C has master volume, multiple channels gain controls
  • Pentode vs. Triode - The Gear Page
    Looking for a good explanation explaining the difference between these two modes I understand the wattage reduction, but what else happens to the signal (eq, overdrive, etc ) when an amp is flipped between the two? Thanks for any info
  • 6V6 Cathode Follower as linestage buffer - The Gear Page
    Triode mode will give a lower output impedance from the 6V6 due to lower internal plate resistance (even though it's being used as a cathode follower; performance will be better than relying on feedback to make everything work) But triode mode also yields less power output compared to pentode mode, whatever tube you use
  • Cathode follower - The Gear Page
    The cathode follower triode will pass some amount of idle current, and this has to be pulled through the large-value resistor between the cathode ground A 12AX7 might pass 1-2mA at idle in typical applications, and if the cathode resistor is 100kΩ then the cathode voltage must be:
  • Triode vs Pentode mode? - The Gear Page
    Triode mode on a pentode sounds thicker, mushier, less articulate Some people think it sounds more bluesy; I think it just sounds sloppy, like the difference between sober and drunk Click to expand That was a very good explanation Also, the pentode tube is not really a triode connected this way, we just call it that
  • Dual Triode in push-pull as a Power tube. . . What? - The Gear Page
    You'll find that power tubes have an even lower voltage gain than the 12AU7 Check out the top of Page 2 of this 6L6GC data sheet: Amplification Factor of 8 (compared to 20 for the 12AU7) Strapped as a triode, the 6L6 has around 1 5 the internal resistance of the 12AU7, but it can also manage more than 5x the current for the same supply voltage
  • Best 6L6 or 6V6 amps - The Gear Page
    What are your top one or two choices for 6L6 or 6V6 amps and why?
  • Whats the difference in sound and response between EL84 and 6L6?
    Let's consider triode-mode operation Look back at those sheets for the 6V6 and EL84, and scroll through them until you see "triode" Both tubes have a listing internal plate resistance (or "ra") of ~2kΩ Yet they sound different
  • the NEW VOX AC15H1TV Review - The Gear Page
    There's tons of switches and pentode triode mode on both the master, and the EF86 side, which significantly reduces or increases gain and volume There's too many features to list On the 12AX7 side (the other channel), it has a volume, treble, and bass set of controls Very simple, very usable, very easy to dial in a nice sound
  • whos got parallel triode amps - matchless etc? - The Gear Page
    what are thoughts around parallel triodes in the input stages a la Matchless etc? obviously sacrificing voltage gain for an immediate current bump, but what about tone effects? like it, hate it? I'm plotting options for a 2 channel amp with very different tones for a friend and thinking about





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