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Wiring a 3-wire Shure 55-S Mic for 2-wire...

Discussion in 'Microphones, Speakers & Audio Processing' started by W5RK, Dec 7, 2012.

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  1. W5RK

    W5RK Ham Member QRZ Page

    Good Morning,

    I have a beautiful new 50's vintage Blue label Shure 55-S microphone here fresh out of the box here mounted to the Heil Boom Stand.

    I would like to wire it for my Kenwood TS-930S .

    I have the Amphenol connector with 3-pins marked 1, 2 & 3. I'll wire in a foot switch or thumb button for the PTT.

    I can't find any info other than wiring it for an XLR connector. I suppose I could use one of those XLR to 1/4" phone plug but that will start to look messy on the bench.

    Any Ideas ?
    I'd appreciate any assistance.

    Rennie Kontak - W5RK

  2. KB4QAA

    KB4QAA XML Subscriber QRZ Page

    Here is the Shure 55-s data sheet. The "Ham Nation" show has an excellent program from a few months ago with advice from Bob Heil about how to connect all types of microphones. This show has been mentioned in several threads since then, and may be pinned above.


    Jump to 12:00 for start of demonstration:


    Attached Files:

    Last edited: Dec 7, 2012
  3. KB4QAA

    KB4QAA XML Subscriber QRZ Page

    Well, I've chased down six downloads of the 930S manual and they all have the same unreadable copy of the mic receptacle.

    Still, nothing brain busting here.

    TS-930S mic is 500-500kOhm. So set the mic on High, +5,000ohm.

    Connect Mic shield to radio ground/shield. Connect one side of mic to (Mic), and the other to (Mic Gnd).

    You will have to figure out how the PTT works, since the labelling isn't standard. I think it is (STBY) to (STBY Gnd). Use a piece of wire to test it. Else, try (STBY) to (Mic Gnd).

    Pay attention to Shure recommended max cable lengths.

  4. WA7PRC

    WA7PRC Ham Member QRZ Page

  5. KA0GKT

    KA0GKT Ham Member QRZ Page

    Here's a link to the 55s spec sheet:

    IIRC, there was a model with the suffic "HS" which was a high impedance microphone. The "H" model needed an external transformer to match high (100K-Ohm) impedance. Shure provided an in-line transformer for the original 55S for high-Z service.
  6. W5RK

    W5RK Ham Member QRZ Page

    I appreciate the input guys, no pun intended. I think I have enough info to get the job done
    73 - W5RK
    Rennie Kontak
  7. W9GB

    W9GB Ham Member QRZ Page

    Rennie -

    The Shure 55-S is also known as the Elvis microphone. Originals are highly prized by some collectors.
    Here is a web page by James Roy regarding the originals and careful wiring / restoration of the originals.

    Shure no longer services the originals, BUT do make the Shure Super 55 and 55SH Series II.

    In August 2010, Shure introduced the Special Edition Super 55-BCR microphone with a black and red color scheme. This microphone is a limited production run and is available in the United States only at Guitar Center stores. MSRP $354
    An original Shure 55S can be upgraded to the 55SH Series II or Super 55 with Shure parts.

    Replacement cartridge for the 55S and older 55SH

    The replacement cartridge for the 55SH Series II does not fit directly into the 55S and older 55SH model (as well as, PE55’s); the shock mount and other internal hardware are different. Since there is no "upgrade kit" of the parts needed to convert a 55S/55SH into a 55SH Series II, parts must be ordered individually, as follows:
    Qty Item Description
    1 99A830 Cartridge (also available as R115)
    4 30B1336 Screws (connects 65B1617 cover to 65B1618 housing)
    4 30F1331A Screws (connects cartridge housing assembly to case back)
    1 66A143 Flex Relief
    1 31C1561 Spacer
    1 65B1618 Housing
    1 65B1617 Cover
    1 39AB167 Nameplate "55SH Series II" (optional)


    Open the 55S/55SH and remove all internal electrical components (i.e., transformer, cartridge, and mounting apparatus), keeping switch leads intact.
    Pass the switch leads through the lead hole of 65B1618 Housing and 65A143 Flex relief, and push the flex relief into position.
    Pass leads through the 31C1561 Spacer.
    Solder according to the wiring diagram on the 55SH series II data sheet.
    Drop cartridge and spacer into 65B1618 Housing.
    Fasten 65B1617 Cover to housing with 30B1336 screws.
    Drop cartridge and housing assembly into the microphone case back and fasten with 30F1331A.
    Reassemble microphone case front to case back.
    Contact Service/Parts Department for pricing and orders. The phone number is 1-800-516-2525.

    ** September 2012 - Also available is the R115S, the mic element used in the Super 55.
    Again, some internal modification will be required.
    Last edited: Dec 8, 2012
  8. WA7PRC

    WA7PRC Ham Member QRZ Page

    Thank you. Thank you very much. ;)
  9. W9GB

    W9GB Ham Member QRZ Page

    Bryan -

    Now I know where he (Elvis) has been hiding all of these years ... :)
    BTW, the Shure 2010 Special Edition Super 55-BCR microphone ...
    was ALLOCATED for only 50 to 100 units in many European countries ... an instant collector's item !
    AGAIN, Back to Heil Sound Technical Tips

    Professional Audio traditionally uses BALANCED AUDIO (Again, AC THEORY .. For RF you Use and THINK: Balanced 300 or 450 ohm FeedLine, Dipole)
    AUDIO INPUTS for Amatuer Radio Equipment is UNBALANCE (Coaxial Cable is an unbalanced feedline, a Vertical Antenna)

    Connecting 3-pin Balanced to 2-pin Unbalanced Inputs

    Heil has this adapter cable as a Plug-N-Play (off the shelf) item:[TABLE]
    [TD]PR 781, Heritage, The Fin, PR 20, PR 30, PR 40
    [TD]CC-1-XLR K
    Last edited: Dec 9, 2012
  10. KA0GKT

    KA0GKT Ham Member QRZ Page

    The Microphone has left the building...
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