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My new (old) signal jenny

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  • #1

    My new (old) signal jenny

    Kyoritsu K-128. Arrived in the letterbox today. Haven't fired it up yet, but the seller told me it was working. I'd like to find a schematic (it uses a 6x4 rectifier, a 12AT7, and a 6BM8). Looks like its been recapped at some stage. Thought it was worth a few hi-res pics (sorry tboy).

    (Edit - well I just fired it up and it works perfectly, but I'm still on the hunt for a schematic just the same)
    Attached Files
    Last edited by tubeswell; 04-29-2011, 06:24 AM.
    Building a better world (one tube amp at a time)

    "I have never had to invoke a formula to fight oscillation in a guitar amp."- Enzo
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  • #2
    FWIW Found a 'schematic' here: Audio Generator K-128 Radio Kyoritsu, Tokyo
    Last edited by tubeswell; 04-29-2011, 09:00 AM.
    Building a better world (one tube amp at a time)

    "I have never had to invoke a formula to fight oscillation in a guitar amp."- Enzo

    Comment

    • #3
      Nice piece of kit It looks like a Japanese tribute to the HP 200C. Just right for working on tube audio gear.
      "Enzo, I see that you replied parasitic oscillations. Is that a hypothesis? Or is that your amazing metal band I should check out?"

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      • #4
        Nice old generator...you definitely should replace all those oil caps, tho...glen

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        • #5
          Looks like a dead ringer for a Lafayette T-22 - at least from the front, so if anyone has one of those schematics, that would probably suffice. TIA.

          @ Mars - would they be all the grey caps?
          Attached Files
          Building a better world (one tube amp at a time)

          "I have never had to invoke a formula to fight oscillation in a guitar amp."- Enzo

          Comment

          • #6
            Long search is complete. Free download here (even tho' it says te-22, its the same thing):

            http://bama.edebris.com/download/tech/te22/te-22.pdf
            Building a better world (one tube amp at a time)

            "I have never had to invoke a formula to fight oscillation in a guitar amp."- Enzo

            Comment

            • #7
              Sweet... I'm experiencing funky old stuff envy. The best thing is that it's easy to troubleshoot and service should you ever need to. If my transistor unit ever fails I probably won't try to fix it.
              "Take two placebos, works twice as well." Enzo

              "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

              "If you're not interested in opinions and the experience of others, why even start a thread?
              You can't just expect consent." Helmholtz

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              • #8
                the simplicity is pleasing

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