Dears, I'm using a SONY MDR 7505 since 2003 with various rigs. Not a noise cancelling headphone but great comfort, with a very clear audio on cw, ssb & am/fm. Power (mW):1000 Impedance: 24 Ω Frequency response: 10Hz - 25Khz Sensibility (dB / W / m): 106 Weight: 220g without cable 73's Philippe A65BI (F5LTB) K3#3616
>>> Barry N1EU <barry.n...@gmail.com> 03-03-2010 2:02 >>> AD4C2009 wrote: > > Well I spent this past weekend 18 hours in radio on saturday and sunday > with my Yamaha CM-500 on my head all the time,either on CW or SSB and felt > no tired,they are smooth and weight little in my head,isolation is > perfect. > I just wanted to post a follow-up message on this thread. I just acquired a CM500 headset - they seem to perform quite well but they can hardly be considered a high isolation headphone. The isolation is about the same as the Heil ProSet but falls far short of the Sennheiser HD280. The CM500 isn't really suitable if you follow the K3NA approach toward maximizing dynamic range with AGC off. On the other hand, the CM500 seems quite good indeed for normal operation with AGC on and the microphone gets great audio reports. 73, Barry N1EU -- View this message in context: http://n2.nabble.com/K3-High-Isolation-Headphones-tp4530272p4663966.html Sent from the [K3] mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
