The CM500 that I bought last summer came with a battery box that could
be plugged in to the microphone circuit. Yet I recall the package or the
web page I bought it from proclaimed "dynamic microphone."
73, Jerry, K0CQ
On 3/21/2010 6:22 PM, Jim Brown K9YC wrote:
> On Sun, 21 Mar 2010 18:48:59 -0400, w4svo wrote:
>
>> I an wondering if anyone has tried using this headset with the Orion?
>
> I don't own an Orion, but I've owned a CM500 for about four months, and used
> it extensively with my K3 for long periods of contesting. I've used it
> directly with my Thinkpad and recording software to record contesting
> messages. It works VERY well in both applications.
>
> Contrary to what some Yamaha documentation says, it is an ELECTRET mic, NOT a
> DYNAMIC, so you do need bias for it. The K3 provides that bias in the form of
> 8 volts through about 5K to the tip of the mic connector. You could easily
> build a suitable adapter into a mic plug -- all it takes is that low-wattage
> resistor from V+ on the mic jack to audio plus on the jack, and a 1/8-inch
> jack to accept the mic. Although it is a 3-circuit jack, no connection is
> needed to the ring contact.
>
> 73,
>
> Jim K9YC
>
>
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