Re: mike cable question

Patricia,

Here is the adapter cable diagram along with the EV docs and Yaesu FT-100
mic pinout jack  I think this will work; let me know if it doesn't.  If you
make changes please let me know so I can update/correct the diagram for my
files.

GL!

[image: EV 664 Mic To Yaesu FT-100 Radio.jpg]

[image: image.png]


Ken
WA2LBI





On Fri, Jul 19, 2019 at 12:53 PM [email protected] <[email protected]> wrote:

> Patricia,
>
> I think I can help although I don't have a FT-100 but I have repaired a
> few some years ago.  Double check the radio mic jack.  I believe it is a
> RJ-12 6 pin not a RJ-45 8 pin so you couldn't use an Ethernet cable.  If it
> is 6 pins then a 3 line telephone cable could be used to make an adapter.
>  If you have, or know somebody who has, a RJ crimper you can build the
> cable yourself.
>
> If possible, I prefer to build adapters vs rewiring a working mic unless
> I'm certain I'll never use it on another rig.  As for the EV-664, it has a
> 4 pin socket on the bottom so you can make a unique cable for the mic.
>
> As it comes from the factory the mic switch is used to short the mic for
> on/off use.  You need to rewire the switch for PTT as well as VOX, if you
> plan to use the latter.  It is also necessary to wire it for lo-z.
>
> The FT-100 needs a resistor, I forget the value, in series with the PTT
> line to ground to key the transmitter.  That can go in the mic or cable
> connector.  I prefer the latter so that removing the cable from the mic
> removes the modification.
>
> Regarding shielding, I would use a 3 conductor shielded cable: shield/PTT
> ground, mic hi, and PTT.  Since the FT-100 has a common ground for mic and
> PTT you don't need more.
>
> I'll work on a schematic.  I should be able to send it to you today.  I'll
> include the official EV docs for wiring the mic for PTT and VOX.  Its a
> good idea to use the factory "standard" if you somebody else has to
> troubleshoot the mic/cable in the future.
>
> *Ken *
> *WA2LBI *
> *LG G6 *
>
>
> ------ Original message------
> *From: *Patricia Wilson [email protected] <[email protected]>
> [FT100]
> *Date: *Thu, Jul 18, 2019 19:46
> *To: *FT100@yahoogroups com;
> *Cc: *
> *Subject:*[FT100] mike cable question
>
>
>
> I was going through my collection of stuff and found a beautiful old
> ElectroVoice 664 that I used with my SB400 Heathkit. It would add some much
> needed charm to the operating desk. Question is what can I use for a mike
> cable. My thinking is I can whack off one end of an ethernet cable and
> connect the mike to the cable. Will it work? Would shielding be an issue?
> Thanks for any feedback (no pun intended, honest).
>
> --
>
> Patricia Wilson
> Apache Junction, AZ
> Member NRA, ARRL
> WB8DXX (Extra)
>
> 
>


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