[TenTec] Yamaha CM500 headset and Orion II

[Richards]

I use the circuit that is discussed and pictured with schematic on
page 67 of the November QST.   The mic capsule should be (that is I am 
guessing from experience with these things) capable of taking somewhere 
between 2 and 15 volts.  This is a hugely typical value for these little 
electret mic capsules.

YOU WANT...  BIAS VOLTAGE that these use is between 2 and 15v  - 
typically a sound card produces about 5 volts.

YOOU DO NOT WANT  PHANTOM VOLTAGE OF 48 V.

Check the White Papers on the Shure web site, www.Shure.com
and it will explain the difference.

I have tried the method described on Page 67 of the Nov. QST with 
success. Many others have told me this works well.

I am BIASED... because I wrote the piece in QST Magazine.

---------------------  K8JHR  ------------------------------

On 12/14/2013 7:50 PM, Phil Sikes wrote:
> Hello to the group. I just picked up one of these headsets and I must say
> they are very comfortable. Incorporating them into my Orion II station is
> going to be nice. I just have a couple of questions of anyone else using one
> of them. First, did you make your own pad for the mike audio or use a
> commercial version? If home brew, what did you use? Secondly, I would like
> to dump the battery box that brings power to the electrets element (2xAA's)
> and make use of the +10vdc at the mike connector. Yamaha wanted my first
> born, complete email list and just about every other piece of info on me
> just to ask a question on how much voltage the element could take. One
> person did ask about using 48v phantom power and was told no that the max
> was 15v. If that is the case then
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