[Elecraft] Yamaha CM500 Headset is a WINNER (and a BARGAIN)

[Joe Subich, W4TV]

If its like most current computer microphones tip and 
ring are connected in parallel. 

73, 

   ... Joe, W4TV 
 


> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jim Brown
> Sent: Thursday, December 24, 2009 12:11 AM
> To: Elecraft List
> Subject: Re: [Elecraft] Yamaha CM500 Headset is a WINNER (and 
> a BARGAIN)
> 
> 
> On Wed, 23 Dec 2009 16:56:44 -0800, K6LE wrote:
> 
> >It's a stereo plug
> 
> No, it's not a "stereo" plug, it's a 3-circuit plug the CAN be used 
> for stereo, or can be used for other things like an electret mic. It 
> could also be used to carry shielded balanced audio wiring. 
> 
> With this mic, the tip is audio high, the sleeve is audio return and 
> cable shield, and the ring is +Vdc to power the tiny impedance 
> converter inside the mic. For more on this, see 
> 
> http://audiosystemsgroup.com/HamInterfacing.pdf  
> 
> and the Appendix on audio for ham radio in 
> 
> http://audiosystemsgroup.com/RFI-Ham.pdf
> 
> 73,
> 
> Jim K9YC
>