[Elecraft] Yamaha CM500 / KOSS SB40

[Dick Dievendorff]

My Yamaha CM500 does not include electronic noise reduction.   

The supplied battery box is for bias, and isn't required if you can get bias
elsewhere, like a PC microphone connector, or a K3 with microphone bias
turned on.

Dick, K6KR


-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Malcolm
Sent: Saturday, February 18, 2012 10:18 AM
To: Elecraft at mailman.qth.net
Subject: [Elecraft] Yamaha CM500 / KOSS SB40

Can some one who has a pair of these tell me if there is any electronic
noise reduction circuitry in the headphones or is it by physical isolation
only please?

Sorry to be off topic 

Malcolm
G0MIC
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