Most likely, you're not going to get a 6l6 tube that's made in the united states. Most (if not all consumer tubes) are made in Russia, with brands like Sovtek, or something that imported into the States from Russia and rebranded. Tube technology isn't rocket science and most Russian tubes should work quite well.
Radio technology has come a long way since the days of tube radios. However, tube radio fans can purchase replacement 6L6 tubes online at thetubestore.
12AX7's and 6L6's.
Generally, when replacing power tubes, you should replace both tubes (or all four) using matching pairs (or quads) of tubes. Sometimes you can get away with not re-biasing with matched tubes, but it's always best to have a technician check it out, so that the tubes are running at their optimal plate voltage (not too hot or cold). Also you don't want to get nasty crossover distortion (not the good kind) which can happen with unbiased tubes in a push-pull (Class A/B) amplifier. [NOTE: unless you are an experienced technician, do NOT try and bias your own amplifier. Plate voltages can be lethal! Spend the $40 for the bench fee to have someone knowledgeable do it.]
whats the best tube acoustic amplifier ?
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Tube From The Nose To The Stomach
there isnt, the commando is the best. but you can use the famas with nube tube its the best with nube tube.
It all varies on the shape of the tube and the onces in the tube...so the tube ithink is best for holding the most toothpaste is creast!
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The best oven heating tube
The best guitar tube amp is debatable and will vary by people's own tastes. However, you if you are looking for the best value, you will want to try Bugera amps.