DJ580.1

The Alinco DJ-580 uses a stereo 3 conductor plug for the
microphone.  If you use a third-party mic with only two
conductors, you will short out the 5 volt supply.  I assume
this 5 volt supply is for the VOX and remote microphones
sold by Alinco.  Anyway, Alinco says that using a two
conductor plug may damage the radio.  If you have a two
conductor microphone from another rig, and want to use it,
you should be able to disconnect the 5 volts by doing the
following:

BEFORE YOU START, CHECK YOUR SCHEMATICS AND BE SURE TO RING
OUT WHICH WIRE IS GROUND AND WHICH IS THE 5 VOLTS.

1.  Open the radio (3 screws on the case, 4 at the battery     
    connector, and the 3 nuts on the volumes & VFO.

2.  Remove the middle circuit board that is attached to the
    back half of the radio (4 screws).

3.  You will see a 2 wire connector.  One wire should be
    ground (black), and the other 5 Volts (red).  You can
    pull out connector and slip the 5 volt wire out.  Then
    you can insulate the wire and its pin and leave it lying
    safely in the case.  You can also reconnect the ground.

4.  If you want to undo this mod you can just re-do the
    connection.

I have done this mod to use the Radio Shack speaker mic.  I
have since purchased 3 pin mics and have returned the radio
to normal.  

73's, Jim, N3KHM @ KA3NVP.#WPA.PA.USA.NA