[Elecraft] Proset with Kenwood?

[Joe Subich, W4TV]

The Elecraft version of the Proset uses an electret mic that 
will not work with a standard Kenwood mic input.  You will 
need to add a resistor/capacitor network inside the Kenwood 
radio or inside the Foster plug on the Proset adapter.  

      Radio                            Proset 
                      1 uF  +
        1 -------------)(------+------  Tip 
                               |
        5 ----------^^^^^^^^---+
                      5.6 K   

        7 ----------------------------  Sleeve

73, 

   ... Joe, W4TV 
 



> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Nelson 
> Wittstock
> Sent: Thursday, December 27, 2007 2:36 PM
> To: Elecraft at mailman.qth.net
> Subject: [Elecraft] Proset with Kenwood?
> 
> 
> I just received the Heil Proset from Elecraft.  When my K3 
> arrives I plan to 
> use the headset with the K3.  Since I expect a rather long 
> wait until my K3 
> arrives I am wondering if the headset can be used with my 
> current TS-940 
> radio.  The earphones work but I don't want to try the 
> microphone until I am 
> sure it is compatible with the 940.  The mike plug is 
> physically proper but 
> I can't find a wiring diagram for the headset so I'm not sure 
> about the 
> electrical correctness.  If the wiring is not a match can I 
> wire up a simple 
> interface or isn't that practical?
> 
> Nelson, K8DJC 
>