That 6550 is used as a regulator in the power supply. Any old 6550 will do! As the French Chef says "No diffawrance". People that claim that one 6550 sounds better than another in the power supply are either misinformed or delusional! There is no music signal passing through that tube! Capeche?
6550 Replacement Tube for ARC Reference 6
I am reviewing info on the best tubes to replace the original ones in my ARC Ref 6. There is one 6550 tube used in this preamp, and it appears that the best replacement is a Tung Sol 6550. However, there are different grades for this, including different grades for the NOS versions. Does anyone know the different grades of this and the different sonic qualities each of these would have? I did note that a couple people claimed that the cheaper reissue of this tube is less detailed, but has a somewhat richer sound. Of course, all this is a matter of taste--any thoughts? (I never bought into the notion that more expensive is always better.) Also, any suggestions for alternatives to the original 6H30 tubes? I understand that these are all made in Russia; however, are there any makes better than others for these?
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roberjerman That 6550 is used as a regulator in the power supply. Any old 6550 will do!Absolutely not true and very bad advice. The OP should check with his dealer or ARC for the most recent 6550 tube recommendations and then go from there. It’s not so much a matter of choosing a tube that sounds best as it is using one that satisfies the circuit requirements. I have found Sovtek 6550WE or Svetlana 6550C to be reliable for this use. |
Man, roberjerman, you really should try the proposed change before you comment, because you clearly haven't. Making theoretical pronouncements with an arrogant tone is sad (capiche?). Even regulators influence the resulting sound of the component. I am speaking from actual "ears on" experience, as it has been true in most tube gear that I have run. The Sovtek vs. Winged C comparison is a very clear sonic shift, IME in my AR Ref 40 - - likely would be so in a Ref 6, too. I have read that others like the Tung Sol's sound, but haven't experienced that myself (but I bet it does have its own presentation). I do agree with Cleeds that you shouldn't just try any 6550 you can get your hands on. AR can provide guidance for what you try. |
