[Elecraft] Cheap headphones

[Jay]

I just got a CM500 yesterday for testing and would say the MIC is quite 
sensitive..only takes a MIC setting of 4-6 and its fine...increasing MIC 
gain apparently does nothing but increase feedback. I guess these powered 
headset are different than the usual Heil Pro line as one can move the MIC 
gain up and down for a Heil and watch the ALC go higher or lower.

The K3 ALC using the CM500 (at least here) remains constantly at about 6-7 
bars (compression set at about 10-12 for best overall performance so far)

The ear cover is complete not like my Heil Pro

I also like the strap across the head. The Heil has some cushion over some 
type of strap that after a while it's noticeable. The CM500 has a net like 
strap that is not hard, also allows air to move so no apparent sweat build 
up after a 5 hour stint in 95 degree weather.

Took a lot of antivox and TX gate to quiet the feedback down during RX modes 
( I may have to take a footswitch for a multi op site)

Settings were : MIC rpl, impedance L (tap 1) , bias on (tap 2)

A nice 9 foot long card, plugs right in to rear panel, no adapters needed 
(less to fail when on the road) , makes things easy when traveling with the 
K3.




----- Original Message ----- 
From: "Michael Usher AG6MK" <ag6mk at muszka.com>
To: "Fabio IZ4AFW / NZ1W" <iz4afw at iz4afw.org>
Cc: "Tom Boucher" <tom at telemetry.demon.co.uk>; "Elecraft reflector" 
<Elecraft at mailman.qth.net>
Sent: Tuesday, April 09, 2013 9:24 AM
Subject: Re: [Elecraft] Cheap headphones


They look to be virtually the same headset.

Visually, the earcups and headband are identical.  The mic boom looks to be 
physically slightly different.  And the Koss has single side cable, vs dual 
on CM500.

The CM500 I have has "Koss" molded on the 3.5mm connectors.