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Thread: Question to owners of ARC Reference Anniversary and/or Reference 10 preamp

  1. #11
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    Quote Originally Posted by Pb Blimp View Post
    Thanks. Very helpful. So the only practical approach is to find the blacks and greys and check them yourself? Do you test the tubes yourself or do the matching by ear?
    One of us has a simple tube-tester but we are not tech-guys.
    We bought pairs from shops, mostly online bcos these tubes are rare in Hong Kong.
    Have to take some risk.
    ARC 40 Anniv preamp, MC2 S1400 monoblocks, Magico S5 speaker, CAS with MSB Platinum IV Plus dac, MSB UMT Plus & Signature Transport Powerbase, Furman isolation transformer.

  2. #12
    VIP/Donor [VIP/Donor] microstrip's Avatar
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    Quote Originally Posted by CKKeung View Post
    One of us has a simple tube-tester but we are not tech-guys.
    We bought pairs from shops, mostly online bcos these tubes are rare in Hong Kong.
    Have to take some risk.
    For power supplies the matching is not as critical as in power sections - the 6550 tube is used as a series regulator and the control circuit can compensate for reasonable variations of Vg. IMHO burn-in is mandatory - preferably carried in a jig or in a cheap amplifier with a fused B+ supply, do not risk your ARC preamplifier with untested new tubes. You should measure the tube before burn-in and after 100 hours.
    DCS Vivaldi 2.0 stack, Soundlab A1 Px's while waiting for the XLF successor, EMT927, SME3012R, ARC Phono 3, Lamm ML1.2 Ref, Lamm L2ref, Stealth Dream speaker , Crystal Dreamline ICs, TA XL digital, TA XL gen V power cables, CenterStage footers and Nordost Qkore8's!

  3. #13
    VIP/Donor [VIP/Donor] microstrip's Avatar
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    Quote Originally Posted by CKKeung View Post
    I own an ARC 40th Anni Preamp and two friends of mine own the ARC Ref 10 preamps.
    We tested diff contemporary and NOS tubes on our preamps and all of us think that the NOS tubes are the best performers.
    The very best replacement for the original 6550 is definitely the Tung-sol black-plate made in 1950s.
    The second best is the Tung-sol grey-plate made in 1960s.
    We also bought and tried the popular NOS Winged-C 6550 but found that it was far inferior to the above two tubes.
    The 6550 supplied by ARC may have been burned-in/tested/matched so they are reliable but sonics-wise they are many leagues below.

    The problem is that ARC40 & Ref10 both need a pair of 6550 and the black or grey plate are quite rare. It's not easy to find a matched pair of good quality so we stock up spare pairs.
    Did you test the JJ 6550 tube from Slovakia?
    DCS Vivaldi 2.0 stack, Soundlab A1 Px's while waiting for the XLF successor, EMT927, SME3012R, ARC Phono 3, Lamm ML1.2 Ref, Lamm L2ref, Stealth Dream speaker , Crystal Dreamline ICs, TA XL digital, TA XL gen V power cables, CenterStage footers and Nordost Qkore8's!

  4. #14
    Addicted to Best! Pb Blimp's Avatar
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    Quote Originally Posted by microstrip View Post
    For power supplies the matching is not as critical as in power sections - the 6550 tube is used as a series regulator and the control circuit can compensate for reasonable variations of Vg. IMHO burn-in is mandatory - preferably carried in a jig or in a cheap amplifier with a fused B+ supply, do not risk your ARC preamplifier with untested new tubes. You should measure the tube before burn-in and after 100 hours.
    Good stuff. Thx. Any recommended turn key sellers providing this service on the better NOS tubes (besides ARC)?
    Paul

    Power - Torus 75 amp WMT. Furutech NCF Lines, Flux-50s, Outlets, PC's. Star ground.
    Cables - Nordost Valhalla 2 and Odin (phono).
    Analog Source- ARC Ref 10 Phono. Acoustic Sig Ascona MKII, TA-9000 arm, Lyra Atlas.
    Digital Source- MSB Reference DAC, Femto 33.
    Amplification - Soulution 721 Pre and 501 Monos.
    Speakers - Raidho D3.1
    Room Acoustics - Acoustic Frontiers Design, RPG Plates, Absorption and Diffraction, and Custom Helmholtz Traps.
    Stands - Solid Walnut by Timber Nation.

  5. #15
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    Quote Originally Posted by Pb Blimp View Post
    Good stuff. Thx. Any recommended turn key sellers providing this service on the better NOS tubes (besides ARC)?
    Try Jim McShane , check out his website , very helpful and knowledgeable. Ordered a lot of tubes from him for myself and my friends . His tubes are well tested and his testing & matching I might say is at par w/ ARC . His based in Chicago .

    Hope this helps,

    Tdh888
    VPI TNT 6 w/ Classic Platter upgrade, Kuzma Stogi REF 313 VTA, Benz Micro Gullwing SLR, VPI HR-X ,JMW12.7 ,Lyra Kleos, ARC REF 5SE, REF Phono 2SE, REF 610T monoblocks, ARC SP 10MK2, a pair of D79B's, Duntech C5000 speakers, Magnepan MG3A Speakers.

  6. #16
    Addicted to Best! Pb Blimp's Avatar
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    Quote Originally Posted by tdh888 View Post
    Try Jim McShane , check out his website , very helpful and knowledgeable. Ordered a lot of tubes from him for myself and my friends . His tubes are well tested and his testing & matching I might say is at par w/ ARC . His based in Chicago .

    Hope this helps,

    Tdh888
    Thanks much for the help. I will check him out.
    Paul

    Power - Torus 75 amp WMT. Furutech NCF Lines, Flux-50s, Outlets, PC's. Star ground.
    Cables - Nordost Valhalla 2 and Odin (phono).
    Analog Source- ARC Ref 10 Phono. Acoustic Sig Ascona MKII, TA-9000 arm, Lyra Atlas.
    Digital Source- MSB Reference DAC, Femto 33.
    Amplification - Soulution 721 Pre and 501 Monos.
    Speakers - Raidho D3.1
    Room Acoustics - Acoustic Frontiers Design, RPG Plates, Absorption and Diffraction, and Custom Helmholtz Traps.
    Stands - Solid Walnut by Timber Nation.

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