[Elecraft] KX3 need microphone help

[Bob McGraw - K4TAX]

Also splitting audio at mike levels can be a real problem as one "split" 
can appear as an input to the other side.   Mikes should be connected 
direct to one radio only.

As Don stated, PL-259 connectors need to be more than finger tight. I've 
found many good looking PL-259 connectors which are exactly that, "good 
looking" but found to be poor conductors offering poor RF path and 
connections.

73
Bob, K4TAX

On 12/30/2015 6:47 PM, Don Wilhelm wrote:
> Where did you add the common mode choke?  What is the choking 
> impedance of that common mode choke?  Take a look at the writings of 
> Jim Brown K9YC for effective common mode chokes.
>
> The fact that you do not have the problem with the MH3 microphone 
> strongly suggests that there is not a problem with the KX3 or KXPA100.
> Both microphones you mentioned are dynamic type and should have Bias 
> turned off.
>
> You might check the coax connections and your coax jumpers. PL-259 
> connectors should be fully seated and be given just a bit more 
> tightening than "finger tight" to make an effective connection to the 
> coax shield.  Use pliers to snug them up a bit after making them 
> finger tight.
> Try different coax jumpers - it is not uncommon to have the connection 
> to the shield fail.
>
> 73,
> Don W3FPR