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EICO 667 tube tester

Discussion in 'Eico Place' started by cc43fan, May 13, 2012.

  1. cc43fan

    cc43fan I'll sleep when I'm dead Subscriber

    Messages:
    1,694
    Location:
    Eastern Upstate, New York
    Im thinking about purchasing one and I was hoping the faithful here would share their opinions, pros/cons, etc. also, if this wasn't your first choice for a tester, which one would be and how would it differ from the EICO 667?

    As always, thanks to all for lending your thinking and knowledge :)
     

     

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  2. kansei

    kansei Super Member

    Messages:
    2,995
    Location:
    New Jersey
    I own an Eico 667 which is super easy to calibrate and works great. I owned at least a dozen tube testers, and the Eico is a very nice tester. I would rank it as the second-best tester I've ever owned, the first being a military TV7 tube tester (although much more complex to calibrate and more expensive).

    Another favorite of mine is the Jackson 648s, which is easier to use but not quite as popular as the Eico. It's tougher to calibrate than the Eico.
     
  3. battradio

    battradio Electron trainer Subscriber

    Messages:
    5,222
    Location:
    Near ST. Louis MO
    I have a 666 as back up to my 539C , been using it from the time i was 11 .Its basicly like a 667 but has 4 ,5 ,6 and 7 pin sockets , just a nice basic testor .
     
  4. cc43fan

    cc43fan I'll sleep when I'm dead Subscriber

    Messages:
    1,694
    Location:
    Eastern Upstate, New York
    And those missing sockets wouldn't be a deal breaker for the majority of the types of tubes used in vintage HiFi, correct?
     
  5. kansei

    kansei Super Member

    Messages:
    2,995
    Location:
    New Jersey
    Not unless you plan on testing 2a3 or 300b tubes. Even in that case, you can easily make a 4-pin adapter for the 667.
     
  6. cc43fan

    cc43fan I'll sleep when I'm dead Subscriber

    Messages:
    1,694
    Location:
    Eastern Upstate, New York
    Thank you very much for the info. :thmbsp:
     

     

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  7. cc43fan

    cc43fan I'll sleep when I'm dead Subscriber

    Messages:
    1,694
    Location:
    Eastern Upstate, New York
    So, I just bought a Hickok 600a for a fair price, I'll know in the next couple of hours if I own two tube testers....lol.
     
  8. kansei

    kansei Super Member

    Messages:
    2,995
    Location:
    New Jersey
    I almost bought a cheap Hickok 600a on eBay about 30 minutes ago. Was that it?
     
  9. Bluelobster

    Bluelobster Well-Known Member

    Messages:
    809
  10. cc43fan

    cc43fan I'll sleep when I'm dead Subscriber

    Messages:
    1,694
    Location:
    Eastern Upstate, New York
    Yep, I think so. BIN,right?
     
  11. kansei

    kansei Super Member

    Messages:
    2,995
    Location:
    New Jersey
    Yep, the very same. Too bad I have 3 tube testers already.
     

     

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  12. gadget73

    gadget73 junk junkie Subscriber

    Messages:
    36,107
    Location:
    Southern NJ
    The 667 isn't a bad tester, but you should be aware that the roll charts may not be up to date. There is a more current version on BAMA (google it) that should be checked first if the one in your machine isn't the current revision. I've not had any trouble from my 667, but I did replace the cap and the rectifier when I got it, and did whatever the calibration process was. I forget specifics but it was really simple. One other trick I've learned is that you want to set the line voltage with a tube plugged in, and if you're doing multiple different tube type, check it periodically to make sure it hasn't drifted. The voltage scale on the dial is pretty much worthless too, so don't go by it.
     
  13. keybank

    keybank Nearly Phoolproof

    Messages:
    290
    Location:
    MN
    667 are very good testers, as long as you take them for what they're worth. You didn't say what your intended use is, so just be aware they're emission testers, good for spotting worn out and shorted tubes. That was their design purpose, and they do it well. Don't expect more of them than that, and you'll be fine.
     
  14. eduarsan1

    eduarsan1 Luis Eduardo Sanchez

    Messages:
    441
    Location:
    Bogotá, Colombia
    For the persons that have a Eico 666 or 667 where the meter is no working I did this modification on it.

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    Now the tube tester is working very well

    If you guys need further information about the mods let me know!!

    Regards
     
  15. ConradH

    ConradH Addicted Member

    Messages:
    7,765
    Location:
    Canandaigua, NY
    Neat meter replacement.

    FWIW, the 666 and 667 are not emission testers. They're dynamic conductance, which is better than an emission tester, but not as specific as a true gm tester. One could almost get gm out of the things, save for the fact that some of the settings are limited to just a few specific values.
     
  16. Whiting

    Whiting New Member

    Messages:
    2
    Hi, could you please give me a little more detail on how to change the meter to digital.
    What type of meter
    Where to buy it
    And more detail how to connect it or rather retro fit it.
    Is this the meter you used http://www.escol.com.my/Projects.html#Project__06
    Just the meter or the complete unit
    Any chance of pics from the underside detailing the fitment

    Thanks & Cheers
     

     

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  17. eduarsan1

    eduarsan1 Luis Eduardo Sanchez

    Messages:
    441
    Location:
    Bogotá, Colombia
    Hello Whiting

    Give me some time to show what I did, for now my agenda is very tight, probably next weekend I´ll post it.

    Regards
     
  18. gadget73

    gadget73 junk junkie Subscriber

    Messages:
    36,107
    Location:
    Southern NJ
    What is that meter actually showing, plate current, or is it actually scaled across a resistor to be a 0-100% gauge? Does the leakage function still work as it would have originally?
     
  19. eduarsan1

    eduarsan1 Luis Eduardo Sanchez

    Messages:
    441
    Location:
    Bogotá, Colombia
    Hello Gadget

    Just the meter was replaced and some protections were added to save the pots, the measure is over the plate curremt.

    See as follows:




    [​IMG]
     

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