Use an Ohm meter and see if pin of the Foster plug is connected to the center pin of the 3.5mm jack on the AD1-K (DC connection). It is entirely possible that the adapter has a blocking capacitor as the AD1-K was designed for use with Heil's dynamic microphones which do not want DC on the mic element.
73, ... Joe, W4TV On 1/21/2014 4:14 PM, Stan Rowe wrote:
Does anyone have any ideas why my Yamaha CM-500 microphone won't work when plugged into the front of the K3. I am using the Kenwood AD1K adapter and I have the firmware set to select the front panel, low gain, with bias on (FP.L bIAS). The CM-500 headphones are plugged into the Phones jack on the front of the K3 and work fine. The CM-500 mic plug (grey) is plugged into the corresponding jack on the AD1K. When I press my footswitch, the K3 goes into transmit but there is no audio when I speak into the CM-500's microphone. I have tried the footswitch plugged in both on the back of the K3 and into the AD1K footswitch jack and it works fine (puts the K3 into transit) in both cases. When plugged into the rear Phone and Mic jacks on the K3, the CM-500 works like it should. In that case I have the firmware set to RP.L bIAS.and both the CM-500 microphone and headphones work fine, so I'm quite sure the CM-500 is not the culprit. It almost seems like the AD1K is the problem. This must be something simple, but I am stuck. Any suggestions much appreciated. Thanks Stan - K6VWE ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
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