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Help with part identification?

Discussion in 'Electronic Components' started by Bob Pownall, May 29, 2007.

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  1. Bob Pownall

    Bob Pownall Guest

    These look like Motorola power transistors, but I'm not having any luck
    finding information on them.

    The label printed on the case is:
    Motorola logo
    4-611
    MEX
    8607

    and
    Motorola logo
    1854-0774
    MEX
    8539

    I'm guessing that the 8607 and 8539 are date codes. Maybe the MEX is
    Mexico? (Assembled in Mexico, perhaps?)

    The line under the Motorola logo _looks_ like a part number, but I
    checked Google and On Semiconductor, and have had no luck. (Motorola's
    power semiconductor business became On Semiconductor, right?)

    Any ideas / suggestions?

    Bob Pownall
     
  2. OEM = 2N6055
    OEM = 2N6056

    Use the HP semiconductor reference on my website:

    http://home.earthlink.net/~mike.terrell/RefHPSemi.html


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  3. legg

    legg Guest

    You'd have better luck refering to the mfr of the device they are/were
    used in. Motorola, TRW, NEC and others produced house-coded devices
    for many industrial mfrs of medium and low power medium wave, VHF and
    UHF transmitters. Cable companies, mobile, cellular repeater, etc.

    Just the application may be enough to tell you basic info, like
    operating voltage and typical frequency range. The package shape is
    another clue.

    ~ 46110 was an Acrian 28V hermetic microwave device with 8-32 stud and
    5.7mm x 26.5mm crossed-lead foil structure. Possibly an original
    device that the house number developed from? (also made close
    electrical variants 46112, 45113 etc.

    ~ 1854 sounds more like a linear hybrid amp module (many pins
    straddling a heatsink bar interface).

    Like you, I'm just guessing.

    RL
     
  4. Bob Pownall

    Bob Pownall Guest

    Michael A. Terrell wrote:
    <Summary: The answer to my questions - they're Motorola parts, but HP
    part numbers.>

    You nailed it - they're in an old HP spectrum analyzer I'm trying to
    repair. It should have, but didn't occur to me to mention that piece of
    relevant information in my original post.

    Thanks!

    Bob Pownall
     

  5. You're lucky that I recognized the sequence. :)


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  6. Franc Zabkar

    Franc Zabkar Guest

    FYI, obscure part numbers can sometimes be crossreferenced here:
    http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search?OpenForm

    - Franc Zabkar
     
  7. legg

    legg Guest

    1854-0774 = 2N6056

    4-611 isn't an HP house code.

    1854-0611 = 2N6055

    RL
     

  8. Some HP parts have an abbreviated part number printed on the case,
    but the parts list contains the full number.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  9. Bob Pownall

    Bob Pownall Guest

    Michael A. Terrell wrote:
    What's that saying? "It's better to be lucky that good..."

    Thanks again.

    Bob Pownall
     
  10. Bob Pownall

    Bob Pownall Guest


  11. No problem. I hope you get it working.

    BTW, if you run across any HP semiconductors that are not listed on
    that web page, please let me know so that I can update it. A 400 DPI
    B&W 2 color scan of the parts list is preferred so I can use scan to
    text conversion, but anything is useful. I would like to add the model
    numbers that oddballs were used in.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  12. Bob Pownall

    Bob Pownall Guest

    Michael A. Terrell wrote:
    After you pointed me in the right direction, I discovered this:

    http://hparchive.com/Bench_Briefs/HP-Bench-Briefs-1987-07-09.pdf

    See pages 3 through 13. Would this be useful? (There might be other
    useful stuff on the hparchive.com site. It's basically a hobbist /
    collector site, with no affiliation with HP or the Agilent spin-off.)

    Bob Pownall
     
  13. Franc Zabkar

    Franc Zabkar Guest

    Some time ago, a group of us at aus.electronics scanned and OCRed a HP
    document. This is the result:

    http://www.users.on.net/~fzabkar/hp_nums.zip

    Be aware that it may contain OCR errors, eg an I (eye) mistaken for a
    1 (one), or an O (oh) for a 0 (zero), etc.

    - Franc Zabkar
     
  14. Franc Zabkar

    Franc Zabkar Guest

    Here's another one:

    Transistor - Diode Cross Reference - H.P. Part Numbers to JEDEC
    http://www.arrl.org/qexfiles/300-hpxref.pdf

    - Franc Zabkar
     
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