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
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:
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
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
Preamp tubes and gain stages -- how does it work? - The Gear Page 2 tubes - 4 triodes - can produce a huge amount of gain Some amps have more stages for various reasons, like multiple cathode followers (which, by definition, can’t increase the gain) or because they dump signal - for example, in a lossy tone stack or to send to FX loop - and then need another triode to make it back up, or because they have multiple channels (ie, not all preamp tubes are
Finished the 6AU6 ECL86 Amp Build! Photos and Schematic Messages 5,743 Reaction score 8,275 Location Texas Jan 23, 2021 #2 I like the LTP PI using the triode halves of the ECL86 tubes I'm soon going to be doing some ECL86 builds into old, gutted re-purposed combo amps I like the idea of using a LTP with these tubes instead of a cathodyne (as in the several Bogen CHB20's I have on hand---- another
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
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