D 104

[CHARLES WHITE]

I very much appreciate the number of responses I have received to my earlier postings - - -

Thanks

And now I have another problem of how do you connect the 8pin to the 4 wires from the D 104?
There is a schematic on the inside of the mike bottom plate but does not address the from 4 to 8 pins.
There are 4 wires in the mike cord; a black, a red, white, and copper for ground.

I assume the black and red are for the mike and the white for PPT.


Charlie White
K6TBB
San Diego
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[Don Wilhelm-4]

  Charlie,

It is difficult to answer from only the wire colors without any
diagram.  Those colors in the cable can mean most anything - except the
shield is ground.

According to the Astatic .pdf in G4WPW's extensive list of microphones,
the wire colors are: White (audio), Shield (AF Ground), Blue (switch
common), Red (PTT), Black (RX Control - no use for most transceivers),
Yellow (Receive Ground - seldom used).  These colors are for the wires
inside the stand - take the bottom cover off to see them.  Then you
could determine which of those wires connect to which color in the
cable.  Use your head and your ohmmeter to be certain.  Someone may have
rewired it according to their own definitions of which color is what.  
Those mic stands may have been through a lot of hams hands.

Work with the colors in the stand rather than the ones in the mic cable.

One thing you could do is to confirm the two that are used for the PTT
switch - connect two of the wires to your ohmmeter and close the PTT -
the two that show continuity when the switch is closed are for PTT  - if
one of those is blue, that goes to pin 7 or 8 of the mic plug, the other
is the PTT  line.

Examine the wires more carefully to see if one is a shielded wire - that
would be th AF and its return would be the shield.

The AF connection is to pin 1 and the PTT connects to pin 2 - the
returns connect to pins 7 and 8.

73,
Don W3FPR

On 6/9/2011 2:25 PM, CHARLES WHITE wrote:

> And now I have another problem of how do you connect the 8pin to the 4 wires from the D 104?
> There is a schematic on the inside of the mike bottom plate but does not address the from 4 to 8 pins.
> There are 4 wires in the mike cord; a black, a red, white, and copper for ground.
>
> I assume the black and red are for the mike and the white for PPT.
>
>
> Charlie White
> K6TBB
> San Diego
>

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[Jim Brown-10]

On 6/9/2011 11:25 AM, CHARLES WHITE wrote:
> I assume the black and red are for the mike and the white for PPT.

Use an ohmeter to find out.  Then study the schematic or connector
pinout info in the Elecraft manual to figure out which wire goes to
which.  You cannot hurt the mic with the ohmeter, and you should hear a
in the mic click when the ohmeter leads hit the two wires going to the
capsule.

73, Jim K9YC


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