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Anyone seen a tube tester like this ??

Discussion in 'CB and Export Equipment and Accessories' started by unit_399, Aug 24, 2019.

  1. unit_399

    unit_399 EL CAPO

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    I ran across this old OLSON tube tester at a flea market here. It came with a notebook with the settings for about ten different tubes. I had a 6AB6 and the settings for it, and the tester seemed to work ok. It would be nice to have a manual with settings for other tubes, plus some operating instructions, but I can't find a model number on it anywhere. Help Anybody ??
    - 399

    EDIT: I should have looked before posting. It is a model KB-92. Radio Museum has photos of a manual, but not source info.

    tube tester.jpg


     
    #1 unit_399, Aug 24, 2019
    Last edited: Aug 24, 2019
    kaos513 and Shadetree Mechanic like this.

  2. mechanic

    mechanic Well-Known Member

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    Olson Electronics was a company based out of Ohio and has many stores from New York to California. They were on the same level as Allied Electronics and Radio Shack. The tube checker you have is one from about 1960 or so and was made for them by EMC, maybe as a kit or by Mercury. They were also big into CBs with their own name on them. Try EMC 211

    From 1968....

    upload_2019-8-24_21-56-19.png

    73 mechanic
     
  3. mechanic

    mechanic Well-Known Member

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    #3 mechanic, Aug 25, 2019
    Last edited: Aug 25, 2019
  4. BandEdger

    BandEdger New Member

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    Looks like a Knight kit somewhat.

    Never heard of Olson, thank you for sharing that!
     
  5. 999

    999 Well-Known Member

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    Olson was an electronics store in the midwest. I remember going into the store on Milwaukee ave in Chicago with my father when he would test tubes for our old Zenith B/W TV.
     
    sunbulls likes this.
  6. Woody-202

    Woody-202 Sr. Member

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    The first thing that came to my mind when I heard "Olson" was their "Sidebander" base station - which wasn't sideband at all
     
  7. kopcicle

    kopcicle Sr. Member

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    What isn't sideband about DSB? No carrier...
     
    SIX-SHOOTER and DainBramage like this.
  8. Tube Noob

    Tube Noob New Member

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    I found one with the manual and snapped pictures of the manual but wow are they uploading slowly. (22 images total.) Lemme know if there's a preferred place to post the full images, or I can email them.
     

    Attached Files:

  9. AudioShockwav

    AudioShockwav Extraterrestrial Admin
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    You can upload them to your Album here on the forum.
    As long as your settings are public anyone can see them.

    73
    Jeff
     
  10. Tube Noob

    Tube Noob New Member

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    Here's the manual! Took me some time to figure out where my album was.

    Unit_399, how has your experience been using it? I haven't tried mine out yet, but need to test and probably replace some guitar amp tubes, and am hoping I can use this. I have no idea yet what I'm doing, however. I'm sure I'll be looking up a generalized tutorial.

    https://www.worldwidedx.com/gallery/authors/tube-noob.59360/
     
    #10 Tube Noob, Oct 27, 2020
    Last edited: Oct 27, 2020
  11. nomadradio

    nomadradio Analog Retentive

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    Looks like a "conductance" tester, not a "transconductance" tester.

    The difference is that the tube is treated as a resistor in the conductance test. It will identify worn-out tubes that can no longer deliver full circuit current.

    A transconductance, or "mutual conductance" tester measures the tube's signal gain. It will catch tube faults the simpler one won't.

    But both of them should show when a tube has an internal short, or a bad vacuum, (says "gas" on the test). The other thing it should reveal is leakage, caused by poor insulation between the heater and cathode.

    No matter how sophisticated, a tester is mostly useful to identify a tube that's bad. Saves time, compared to troubleshooting a bad tube while it's in the radio.

    Whether or not it's "good" enough to make the radio work will only be known by putting it in the radio to see. If the radio doesn't like a particular tube, the tester's opinion doesn't count for much.

    73
     
    AudioShockwav and Tokin like this.

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