sparkie
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    • sparkie
      sparkie replied to the thread Tung-Sol KT170.
      There is only a two things that can make the KT170 not compatible with KT150 amps. one is low plate voltages and another is the output...
    • sparkie
      sparkie replied to the thread Vacuum tube amplifier kit.
      I was looking at kits for design ideas instead of purchasing them. But it seems everyone does a similar thing with a box with the tubes...
    • sparkie
      sparkie replied to the thread KT88/EL34.
      It really would depend on the output transformer and its screen connection method (tridoe vs. ultra linear) But the EL34's I like to use...
    • sparkie
      Its hard to tell. But there is a lot of 'quirks' or 'idiosyncrasies' when designing the ADC circuit much less the ADC IC chip itself...
    • sparkie
      No, your not delusional. As an electronics engineer, I can tell you the imperfect things about digital, even though it looks like you...
    • sparkie
      I would imagine the results would vary depending on the magnetic radiation of the speaker. But not all will need this as some amps would...
    • sparkie
      3A is a lower plate voltage tube, is it supposed to be compatible to it?
    • sparkie
      sparkie replied to the thread Blue Tooth Add On.
      It cost me $350 at an online music store. I'm sure there is cheaper stuff, but this one works really well compared to buying one with...
    • sparkie
      All I see is just talk so far. I'll post circuit topologies. I'll start with common ones first. Lets talk about the grounded...
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    • sparkie
      sparkie replied to the thread RCA to XLR cable question.
      It doesn't matter, but a good xlr cable run is not expensive. You don't have to use pin 3 when converting to xlr except when you...
    • sparkie
      sparkie replied to the thread Blue Tooth Add On.
      The Radial BT pro V2 is the one I use. I run exclusively XLR on my hi-fi gear and this is what I recommend for people with XLR inputs.
    • sparkie
      sparkie replied to the thread Harsh top-end.
      I want to take a few minutes to explain to the end user audience that its a tube engineer newbie mistake to make all metal film resistor...
    • sparkie
      sparkie replied to the thread Harsh top-end.
      Change the 6922 tube to an Amperex 6DJ8. Looking at the picture of the inside of it, its one of the very few tubes that will warm up...
    • sparkie
      a cap and a low value resistor in series between chassis ground and the power cord's green wire will do the same thing regardless if its...
    • sparkie
      Unbalanced audio always adds its power supply noise to the signal. Which is the unavoidable in its design. When DC gnd is linked to GNd...
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