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  • Tubes and Tube Codes

    Thought I’d start this thread in order share what is known about manufacturing codes and who made what tubes for whom among the old time companies.

    Here’s some good info on Phillips based tubes that of course includes Mullard and Amperex.
    Myles B. Astor, PhD, Administrator
    Senior Editor, Positive-Feedback.com
    ________________________________________

    -Magico S5 Mk.2 speakers with SPod feet
    -cj 40th Anniversary ART300 monoblock amplifiers
    -cj GAT preamplifier Series 2 preamplifier
    -Doshi V3.0 phonostage
    -VPI Vanquish direct-drive turntable
    -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
    -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
    -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
    -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
    -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

  • #2
    Now according to this site, Mullard made very few ECC81 tubes. Most were Siemens tubes.
    Myles B. Astor, PhD, Administrator
    Senior Editor, Positive-Feedback.com
    ________________________________________

    -Magico S5 Mk.2 speakers with SPod feet
    -cj 40th Anniversary ART300 monoblock amplifiers
    -cj GAT preamplifier Series 2 preamplifier
    -Doshi V3.0 phonostage
    -VPI Vanquish direct-drive turntable
    -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
    -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
    -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
    -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
    -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

    Comment


    • #3
      A little on the history of the popular Phillips ECC83 tube.
      Myles B. Astor, PhD, Administrator
      Senior Editor, Positive-Feedback.com
      ________________________________________

      -Magico S5 Mk.2 speakers with SPod feet
      -cj 40th Anniversary ART300 monoblock amplifiers
      -cj GAT preamplifier Series 2 preamplifier
      -Doshi V3.0 phonostage
      -VPI Vanquish direct-drive turntable
      -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
      -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
      -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
      -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
      -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

      Comment


      • #4
        Just to make you wonder if you ever know what you are buying unless you know the codes etc.

        Myles B. Astor, PhD, Administrator
        Senior Editor, Positive-Feedback.com
        ________________________________________

        -Magico S5 Mk.2 speakers with SPod feet
        -cj 40th Anniversary ART300 monoblock amplifiers
        -cj GAT preamplifier Series 2 preamplifier
        -Doshi V3.0 phonostage
        -VPI Vanquish direct-drive turntable
        -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
        -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
        -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
        -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
        -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

        Comment


        • #5
          Telefunken date codes.
          Myles B. Astor, PhD, Administrator
          Senior Editor, Positive-Feedback.com
          ________________________________________

          -Magico S5 Mk.2 speakers with SPod feet
          -cj 40th Anniversary ART300 monoblock amplifiers
          -cj GAT preamplifier Series 2 preamplifier
          -Doshi V3.0 phonostage
          -VPI Vanquish direct-drive turntable
          -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
          -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
          -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
          -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
          -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

          Comment


          • #6
            Thanks, Myles. The Doshi tape prepro that both of us have, uses ECC81 (12AT7) tubes (six of them). I was lucky to get a set of the Siemens triple mica tubes - the very last one on the right bottom in the website under ECC81 that came with the Doshi that I bought used. They are great sounding and quite a bit cheaper than the Telefunkens (which are considered the gold standard by most). There are three thin mica discs that run across the tube (the third is near the top of the tube, missing in the other Siemens tubes which have two mica discs normally).

            The arcane nature of buying NOS tubes with all the variations is something that I have avoided. I only learned about the triple mica designation and what it meant in the past couple of months. It is like looking at the labels and dead wax on old records to determine what pressing run you have.

            Larry
            Analog- VPIClassic3-3DArm,SoundsmithZephyrII+MiyajimaZeroMono, 2xAmpex ATR-102,Doshi3.0 BottleheadPhonoPre,Herron VTPH-2A
            Dig Rip-Pyramix,IzotopeRX3Adv,Mykerinos,PacMicroModel2
            Dig Play-mchNADAC, LampiGG, Roon, HQP, Oppo105
            Electronics-Herron 360Pre,CJ MET1mchPre, Cary2A3monoamps
            Speakers-AvantgardeDuosLR,3SolosC,LR,RR
            Other-512Engineer/Marutani Symmetrical Power, ArtKelmGround1, AudioDiskVinylCleaner,AirTightRecordFlat, Scott Rust Interconnects,
            Music-15KRecs(90%classical),1KR2Rtapes,50TBrips

            Comment


            • MylesBAstor
              MylesBAstor commented
              Editing a comment
              The Tele ECC801S that I am using are triple mica. Also have some Siemens E83CC (?) that are triple mica. Never tried them though. Bought them with the intent of trying and just never got around to it.

          • #7
            Some more tube codes.

            Myles B. Astor, PhD, Administrator
            Senior Editor, Positive-Feedback.com
            ________________________________________

            -Magico S5 Mk.2 speakers with SPod feet
            -cj 40th Anniversary ART300 monoblock amplifiers
            -cj GAT preamplifier Series 2 preamplifier
            -Doshi V3.0 phonostage
            -VPI Vanquish direct-drive turntable
            -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
            -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
            -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
            -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
            -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

            Comment


            • #8
              http://triodeel.com/eiacode.htm
              Vbr,

              Sam

              Comment


              • #9
                Tube data sheet database, just in case people aren’t aware of it: http://www.nj7p.org/Tubes/SQL/Tube.php
                TAPE: Studer A807, A810; Revox B77 MkII; Tascam BR-20; Technics RS-1700; Pioneer RT-707, RT-909
                VINYL: Pioneer PL-50LII/Benz LP-S MR/ModWright PH 9.0; Denon DP59-L/Dynavector 20xH
                DIGITAL: Oppo BDP-95, MacMini > Oppo Sonica/Pioneer N-50
                SPEAKERS: B&W Nautilus 800, Pioneer DSS-9
                AMPS: Cary SLP-05/Sunfire Signature 600, Pioneer SX-1980

                Comment


                • #10
                  Myles B. Astor, PhD, Administrator
                  Senior Editor, Positive-Feedback.com
                  ________________________________________

                  -Magico S5 Mk.2 speakers with SPod feet
                  -cj 40th Anniversary ART300 monoblock amplifiers
                  -cj GAT preamplifier Series 2 preamplifier
                  -Doshi V3.0 phonostage
                  -VPI Vanquish direct-drive turntable
                  -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
                  -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
                  -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
                  -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
                  -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

                  Comment


                  • #11
                    Myles B. Astor, PhD, Administrator
                    Senior Editor, Positive-Feedback.com
                    ________________________________________

                    -Magico S5 Mk.2 speakers with SPod feet
                    -cj 40th Anniversary ART300 monoblock amplifiers
                    -cj GAT preamplifier Series 2 preamplifier
                    -Doshi V3.0 phonostage
                    -VPI Vanquish direct-drive turntable
                    -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
                    -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
                    -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
                    -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
                    -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

                    Comment


                    • #12
                      Myles B. Astor, PhD, Administrator
                      Senior Editor, Positive-Feedback.com
                      ________________________________________

                      -Magico S5 Mk.2 speakers with SPod feet
                      -cj 40th Anniversary ART300 monoblock amplifiers
                      -cj GAT preamplifier Series 2 preamplifier
                      -Doshi V3.0 phonostage
                      -VPI Vanquish direct-drive turntable
                      -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
                      -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
                      -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
                      -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
                      -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

                      Comment


                      • #13
                        I have just received an e-mail asking for details of military valve markings so here's a little primer for anyone who might have a similar interest. Valves used by the British military Armed Services were marked with a  CV or common valve name which was defined by the  Inter-Service Technical Valve Committee in 1941.  
                        Myles B. Astor, PhD, Administrator
                        Senior Editor, Positive-Feedback.com
                        ________________________________________

                        -Magico S5 Mk.2 speakers with SPod feet
                        -cj 40th Anniversary ART300 monoblock amplifiers
                        -cj GAT preamplifier Series 2 preamplifier
                        -Doshi V3.0 phonostage
                        -VPI Vanquish direct-drive turntable
                        -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
                        -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
                        -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
                        -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
                        -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

                        Comment


                        • #14
                          Don't know if folks appreciate the level of sophistication that tube manufacturers achieved 75 years ago. Metalurgy; glass blowing / seals; precision processes; QC - all geared to turning out hundreds if not thousands of tubes per day - at remarkably high quality and cheap cost.

                          https://www.youtube.com/watch?v=QCksgN7kiv4

                          More videos out there if you want to search - few of today's tubes come close


                          Charles

                          Comment


                          • #15
                            another Telefunken date code list or just ask Andy Bowman at VTS...



                            http://tctubes.com/telefunken-date-codes.aspx

                            Comment

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