Bottlehead Forum
General Category => Technical topics => Topic started by: howardnair on June 28, 2010, 01:35:05 PM
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having ordered a stereomour--i am now curious about all the different 2a3 tubes--opinions on the JJ 2a3 40 watt---the shuguang2a3c --the shuguang 2a3z-sino--sovtek and any others--i noticed the jj2a3 40 watt has just that- 40 watts of dissipation--how much of a benefit is that compared to the others--thanks howie
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When my stock Sovtek tubes wore out I ordered a pair of Shuguang 2A3Cs. I had nothing to fairly compare them to but loved the sound immediately. I have since bought a pair of RCA Blackplates and they are better. Not by a great margin but meaningful. They are not used often.
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The J/J 2A3-40 is essentially a 300B, with a 2.5V, 2.5A filament. 2A3 is normally rated at 15Watts PD.
In a Paramour (or Stereomour), it would behave as a 2A3 would, dissipating 15W or less.
Power output would be the same as a "normal" 2A3.
HTH
/ed B in NC
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thanks--i will order the shuguang 2a3c's -howie
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They need to be run around 60mils in current to be happy. They are very quiet and sound quite good. Cheap too. I believe that they are in essence a Sovtek 300b that runs at 2.5v. Richard
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They need to be run around 60mils in current to be happy. They are very quiet and sound quite good. Cheap too. I believe that they are in essence a Sovtek 300b that runs at 2.5v. Richard
So, you would not expect them to sound their best in a Paramour or Stereomour, which run 50mA? We'll have to try that some day! :^)