As I noted in my report, which deliberately reached no
conclusions, just the facts ma'am, the microphone stopped
working when I removed the "bias" on the K3. So it needs that
power. Well, electret microphones certainly need power to run
their internal amplifiers. Some other microphones (e.g.
condensor) also need power, which is why pro audio systems have
phantom power over their audio cables.
It very probably isn't a dynamic mic, although someone might
build a dynamic mic with a built-in amplifier which would only
work with external power. YMMV!
However, given the electret microphones are very cheap and are
good quality, I'd bet on electret.
For more information and a fun read, see
<https://en.wikipedia.org/wiki/Microphone>.
73 Bill AE6JV
On 11/8/20 at 4:27 AM, [email protected] (Jim Brown) wrote:
On 11/7/2020 2:42 PM, Bill Frantz wrote:
The packaging said (in part), "Dynamic Microphone for Active Musicians"
The sales/marketing department, usually ignorant of what
they're selling, wrote that drivel you're reading, which is
intended simply to sell more of whatever they're selling.
The CM500 has had an ELECTRET mic as far back as 2008, when
W6XU, another audio professional, arranged a group purchase for
your Bay Area contesting club. It DOES need Bias, which most
modern rigs provide on one pin of their mic connector. Simply
adding a resistor of suitable value (in the range of 5-10KOhms)
between that pin and the mic input pin, provides bias suitable
for most electret mics.
---------------------------------------------------------------------------
Bill Frantz |"Web security is like medicine - trying to
do good for
408-348-7900 |an evolved body of kludges" - Mark Miller
www.pwpconsult.com |
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
