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D104 to Kenwood TS2000

Discussion in 'Microphones, Speakers & Audio Processing' started by K3AXR, Apr 21, 2012.

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  1. K3AXR

    K3AXR XML Subscriber

    I just purchased ana Astatic D104 microphone for old times sake. I have a Kenwood TS2000 and need to not only adapt the connectore but match the impedance. The data I found on says I need to build an Active Buffer-Amplifier. Does anyone offer this as an already built unit? I'm basically lazy and if I can but this as well as the needed changes from the 4-pin mic connector on the mic to an 8-pin for the TS2000. Any thoughts on this will be greatfully appreciated.
    de K3AXR
    Dell Palmer
    k3axr@arrl.net
     
  2. KD8DEY

    KD8DEY Subscriber

    On the bottom of the D-104 is there a small hole with an adjustment inside??
     
  3. W0LPQ

    W0LPQ Ham Member

  4. W9GB

    W9GB Ham Member

    Dell -

    Great, but Astatic built the D-104 over a 70 year period -- SO you need to determine the BASE
    that your purchase has. THIS will determine the options and choices for matching impedances to
    your Kenwood TS-2000 transceiver.

    D-104 Schematics of various base stands.
    http://www.barovelli.com/projects/radio/radioastatic.htm

    The "G" and "UG8" stands do not have a pre-amplifier or impedance matching transformer.
    In those instances, the crystal microphone element (Hi-Z, 25K - 50Kohms Z) would need to be matched to
    the lower impedance (~600 ohms Z) microphone input of your Kenwood TS-2000.

    w9gb

    My D-104 Preamplifier - Tone Control
    Alan Wolke, W2AEW (1999)
    http://www.qsl.net/w2aew/myd104amp.html
     
    Last edited: Apr 22, 2012
  5. K3AXR

    K3AXR XML Subscriber

    Yes, there is a small hole with a cream colored adjustment under it.
     
  6. KD8DEY

    KD8DEY Subscriber

    Then it's an amplified version. you don't need to worry about a buffer.
    the amp serves that purpose And the impedance should be fine.
    BUT you need to figure out which version you have.
    does it only have 4 wire and a small switch underneath the plate
    or does it have more than four wires in the mic cord and no switch (shield white black red blue yellow)
     
  7. K3AXR

    K3AXR XML Subscriber

    The mic cord has 4 wires; shield, black, red and white.
     
  8. KD8DEY

    KD8DEY Subscriber

    put the switch to R for Relay switching
    Pin 1 White
    Pin 2 RED
    Pin 7 Shield
    Pin 8 Black
     
  9. KB4QAA

    KB4QAA XML Subscriber

    Once again, may I suggest we have a sticky just for D104 mics to answer these perpetually repeating questions? :)
     
  10. K3AXR

    K3AXR XML Subscriber

    Thanks for the help,KD8KDY.
    73
    Dell
     
  11. KD8DEY

    KD8DEY Subscriber

    Never Met him
     
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