Recent content by sam6550a
  1. sam6550a

    What a long, strange trip it's been -- (Robert Hunter)

    $1299 for Gungnir MB.
  2. sam6550a

    Schiit Happened: The Story of the World's Most Improbable Start-Up

    And know how to do it. Fuses do not blow for no reason---they blow to protect things.
  3. sam6550a

    Schiit Happened: The Story of the World's Most Improbable Start-Up

    I have close friends in North Carolina.
  4. sam6550a

    Schiit Happened: The Story of the World's Most Improbable Start-Up

    North Carolina road kill comes to mind.
  5. sam6550a

    Schiit Happened: The Story of the World's Most Improbable Start-Up

    Who do you think this was directed at? Your tube vault may be at risk.
  6. sam6550a

    Schiit Happened: The Story of the World's Most Improbable Start-Up

    Believe me, as an old time tube amplifier listener and designer, his creations sound better than they look.
  7. sam6550a

    L0rdGwyn's DIY Audio

    Beware @bcowen!
  8. sam6550a

    Darkvoice 336i & 336SE Tuberolling PartII

    Since the only data presented is one number, which I surmise is transconductance, I have no way to tell. Tung-Sol [the original US company] specified the transconductance as 9000 at 87ma plate current and 11000 at 140 ma. Othe factors, however, also affect tube performance. I do have 3 6550s...
  9. sam6550a

    Darkvoice 336i & 336SE Tuberolling PartII

    Getter flash is generally silver in color. The getter flash on the subject 6550 is brown or tan, indicating that the tube was driven hard, the elements got very hot and out gassed, which the getter flash tends to adsorb. As it is depleted, the silver color fades, This tube is probably gassy...
  10. sam6550a

    Darkvoice 336i & 336SE Tuberolling PartII

    I still have my slide rules and use them occasionally. Yes, I had a manual Royal and had to write lab reports with Rapidograph pens.
  11. sam6550a

    Schiit Happened: The Story of the World's Most Improbable Start-Up

    He may have a reluctance to report it.
  12. sam6550a

    The Reference 6SN7 Thread

    You are most welcome. Excellence in design is a highly unrewarded virtue in today's instant gratification environment.
  13. sam6550a

    The Reference 6SN7 Thread

    There is no doubt in my mind that @Paladin79 has designed and built a very fine headphone amp named Incubus. Although it may look like a Dark Voice or Bottlehead Crack in that it utilizes 1-6SN7 and 1-6AS7, the fundamental difference [without divulging any design information] is ATTENTION TO...
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