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Astatic T-UP9 / D-104

Discussion in 'Microphones, Speakers & Audio Processing' started by N2WXN, Sep 17, 2021.

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  1. N2WXN

    N2WXN Ham Member QRZ Page

    My name Edward Vargas ( N2WXN ) , I have the astatic mike stand T-up9 / D-104 the problem is in the inside of the stand were the contacts are on a pyramid sequence 5 tabs on the left 4 tabs on the right were the cable from radio go's to the sequence are as ; a, b, c, d, e, f, g. j. see pic. that is my problem were each wire go.

    Attached Files:

  2. W9GB

    W9GB Ham Member QRZ Page

    Ed -
    You asked this same question on a September 9 , in the General Question Forum, with several answers. You concluded that assistance saying you agreed and disagreed with answers given.

    ASTATIC Microphone Schematics ( , David Palmer’s web page)
    The clean (easy to read) schematic for the Astatic T-UP9 Stand is posted BELOW.
    Today, You have posted a Clearer Photo of your Astatic D-104 with a T-UP9 Desk Stand,
    the demonstrates your situation (and your confusion).
    RED, BLACK, YELLOW Microphone Cable wires are DISCONNECTED,
    and it appears wiring to the “Leaf Switch” contacts (Switchcraft) was changed.
    I Do Not see the 9 Volt battery Snap connector, wired to pre-amplifier board.
    The Astatic T-UP9 uses a six (6) Conductor Coil Cord (to radio), shown in schematic.
    Black, Blue, Red (J,H,G) : Isolated PTT switch contacts
    Yellow, White, Shield(over White) (F, B, E) : Associated with Pre-Amplified Audio

    The Pre-Amplifier is on the Right Side of your Photo
    The “Leaf Switch” Contacts for the Push-to-Talk (PTT) Function are on Left Side
    IF You can not properly wire this Microphone, based on Picture in this Answer,
    Seek Technical Assistance in your Area (Hands On), possibly a Local Radio Club.
    Last edited: Sep 18, 2021
  3. W9GB

    W9GB Ham Member QRZ Page

    Ed -

    LEAF Switch Contacts have existed for over a Century.
    First introduced with basic momentary switching and the Telephone Industry (Dial phone).
    Used with Push buttons, Levers, and Pulsed switching (Mechanical).
    You use the words Pyramid and Horizontal which is not Industry terminology.
    Switchcraft (Chicago) still makes Leaf Switches.
    Western Electric (AT&T) Hawthorne Works (Cicero, IL) was longtime mfg. and buyer.

    Shure Microphones (Skokie/Niles, IL) used Leaf switches for PTT (Make/Break)
    on their PA / Communication desk microphones (Shure 444, 450).

    PHOTOS of Leaf Switches (Examples) Below.
    45EC4C98-BBC5-44D4-9B4B-82E1DEC63A4A.jpeg F1DCF8E2-FC50-41F0-804D-67ABAC08B7F0.jpeg
  4. W9GB

    W9GB Ham Member QRZ Page

    ASTATIC Base Microphone Parts

    Diagram and Astatic Part numbers
    R&R Communications

    Ken’s Electronics

    42339-00-00 : Switch Contact Assembly (3PDT) with Battery Holder
    Where to get missing Astatic Desk microphone parts?

    Chuck Brown owns Survival Radio (Warren, Ohio),
    where he buys D-104 microphones, sells parts, and repairs Astatic microphones.

    eBay reseller : survivalradio2014 (Warren, Ohio)
    Specializes Astatic Desk microphones parts (lives near former Astatic plant)
    Last edited: Sep 18, 2021
  5. N2WXN

    N2WXN Ham Member QRZ Page

  6. N2WXN

    N2WXN Ham Member QRZ Page

  7. W9GB

    W9GB Ham Member QRZ Page

    Soldering on those Tabs is so BAD (True Hack — Soldering is a Taught Skill)
    I would remove ALL Wires and Solder (Wick and Flux) …
    and START FRESH. This microphone requires ability and skill to Rebuild Properly.
    Nine (9) Solder Tabs … Nine (9) Alphabet consonants in Order.

    WHICH One is “A” ?? EASY (from Schematic)
    1.) USE your VOM / DVM, Set to Continuity.
    2.) Start at One End of the Tabs , with First 2 tabs.
    3.) IF Continuity is present, those Tabs are J, H …. IF NOT, THEN A, B
    4.) You can TEST Function of remain8ng Leaf Switch contacts with your VOM.
    5.) WIRE According to Schematic, Use FRESH Wire (proper color) when needed.
    Last edited: Sep 22, 2021

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