[Elecraft] Yamahs CM500 Headset

[Jim Brown]

On Sun, 6 Sep 2009 18:42:31 -0700, Dick Dievendorff wrote:

>I just tried out my new Yamaha CM500 as well.

Several of the guys in our contest club have bought these headsets 
and fired them up with their K3s. One of them, W6XU, brought one to 
our meeting last night, and I tried it on. It is quite comfortable, 
and well built. The headphones are of the "big closed" type that 
provide some isolation from noise in the shack. They are NOT active, 
noise-cancelling type. 
The mic is a cardioid electret.   

Another of the guys, K6TD, had me listen to his on the air. It 
sounded very good with no tweaking of the K3, and with tweaking, 
produced very competitive audio. The tweaking consisted of using 
maximum cut on the three lowest filters, 6dB boost at 2.4 kHz, and 
10 dB boost at 3.2 kHz. I also had him kick in about 10dB of 
processing. This eq is consistent with most mics designed for SSB 
communications use (like the Shure and Heil products). The 
difference is that this headset sells for only $45 online at Sam Ash 
with free shipping, a bit more at other vendors. For those who don't 
know, Yamaha is a well respected audio company. 

73,

Jim Brown K9YC