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600ohm vs 50k ohm mic

Discussion in 'General Technical Questions and Answers' started by VE6ATR, Nov 20, 2019.

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  1. VE6ATR

    VE6ATR Ham Member QRZ Page

    Hello everyone,

    I have a Yaesu td 148 microphone with a selector switch in the back for either 600 ohm or 50k ohm which do I set it to?
  2. W1TRY

    W1TRY XML Subscriber QRZ Page

    Typically, for tube (aka vintage) radios, high impedance (50k ohm) and for modern radios, low impedance (600 ohm.) Read the manual for the transmitter/transceiver for the best guidance.
  3. VE6ATR

    VE6ATR Ham Member QRZ Page

    Thanks for the reply I took your advice...I Found it in the manual....stop and read the manual Dave... haha thanks :)
    W1TRY and KA0HCP like this.
  4. K8ERV

    K8ERV QRZ Member QRZ Page

    You can always try both settings. The one that does not cause smoke is the right one.
    TOM K8ERV Montrose Colo
    K2CQW likes this.
  5. K8JD

    K8JD Ham Member QRZ Page

    I found that a hi Z mike is partially shorted out by the low Z mic inputs but a low Z mic may work fine on a hi Z input.
    Still good advice from a "strictly CW " operator :D
  6. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    Never cut the red wire.
    K3XR likes this.
  7. WA9SVD

    WA9SVD Ham Member QRZ Page

    My supervisor insisted it was the GREEN wire that shouldn't be cut. Then again, he was color blind...:oops:

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