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EEVblog #1334 – Mystery Dumpster Teardown

Mystery dumpster teardown time! With the most amazing mechanical mains power switch you’ll ever see! ...


  1. Hi Dave I´m the guy how make the mods in the service manual.
    If you want the original copy please give me your email and I will send you the original.

    Best regards and thanks for your videos.


  2. Hope you put it all back together, and it’s a keeper in your lab.

  3. Hi Dave,

    noticed that Tek213 unit on your top bench shelve from a quite a while back.

    Nice tear-down, hope it will reassemble OK. These where quite coveted at that time and a nice package/function engineering example.

    I have a similar Tek unit. The 305 Sony-Tektronix. Similar concept with DMM and two channels. I replaced the Ni-Cd batteries as I find it quite useful when I need to have a floating measurement.

    Keep up the good work. I really enjoyed the ceramic capacitor video as well as the microphone series.



  4. The NEC 741 chip in the PWR Supply board says: ‘POZIBE’. I bet it was crowdfunded.

  5. In regards to size, I am curious just how much you could shrink it if you opted to go with all SMD.

  6. The vertical board pins were probably staked likewise the IC’s and TO-92 packages which would be appropriate still for early 70’s. (Never saw plug in To-92’s before)

    I was a manufacturing engineer for Motorola 2-way in 73 and watching the ladies on the staking machines installing pins and eyelets was amazing.

  7. Great video dav, brings back a lot of memories I had a leader LBO 325, dual channel compact o-scope and loved it when I was a student, It worked just as well as the big ones. I thougth it ran on 12 volts as well, can’t remeber. I still look for them on ebay, if ones at the right price I getting it. I left mine at my old company I worked for,they needed it more that I did (small mom and pop repair place).

  8. Wonderful teardown video! I’m particularly impressed with your enthusiasm in appreciating the engineering behind the product. I have a similar Tek (221 model) and I do love its performance and form factor.

    Keep up the good work in terms of sharing your thoughts and experiences with electronics and test gear!

  9. This is a piece of beauty. Please keep it working.

    This is worth a museum

  10. Hi Dave. Excellent site. I have one Tek 213 with battery problem. I cant fix the problem. Do you know anybody in Spain could repair the 213?
    Thanks in advance.
    Xavier – Barcelona. Spain.

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