The High isolation headphones are of course only going to help if you have much ambient noise in the shack.
I find my Beyerdynamic DT234PRO headset very good. It's not a very high isolation headset but it's a fully closed design and my shack is reasonably quiet the DT234PRO is a headset that is produced for language lab type applications and widely used by PC gamers too, it's comfortable to wear for long periods of time and provides reasonable isolation from the surroundings. I get great audio reports from the microphone which is a back electoret condenser with a cardioid pattern. It has a presence peak (like most microphones intended for the spoken word, Heil did not 'invent' this..) and the cardioid pattern helps to reduce pick-up of any ambient noise It's completely Plug and play with the K3, plug it in the back and turn Microphone bias. I paid about 60 Euro for it on Ebay 73 Brendan EI6IZ On Sun, 2010-02-07 at 03:21 -0800, Bill W4ZV wrote: > "High isolation headphones" below means ~30 dB isolation from ambient noise. > Heil does not make any in this range and most active noise reduction > headphones (e.g. Bose) only have 10-15 dB. Here are some examples of what > Barry meant: > > http://www.extremeheadphones.com/ex-29.html > http://www.sennheiserusa.com/private_headphones_dj-headphones_004974 > http://www.etymotic.com/ephp/er6.aspx > > These are all available in the $75-100 range. > > 73, Bill > > > Doug Turnbull wrote: > > > > Barry, Sorry but what do you mean by 'high isolation headphones'. Would > > the Heil Pro-Set Plus do? > > 73 Doug EI2CN > > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of Barry N1EU > > Sent: 07 February 2010 01:01 > > To: [email protected] > > Subject: Re: [Elecraft] K3 in a cw pileup - needs work > > > > > > > > Barry N1EU wrote: > >> > >> You need to maximize your rf/af dynamic range - that is what is going to > >> turn that mush into a beautiful symphony of distinct signals of varying > >> levels. What has worked well for me is AGC off (although AGC on works > >> fine as well), high isolation headphones, and the gain throttling > >> techniques (most important) described by K3NA, W4ZV, myself, and others. > >> > > Just to continue from previous post - I experienced only mush in pileup > > reception until fully adopting this technique. High isolation headphones > > are critical because you want to set gain such that weak signals are > > lightly > > heard but clearly copiable. You're maximizing the receive dynamic range > > delivered to your ears and the high isolation means you can clearly hear > > fainter signals without turning up the gain and squashing the dynamic > > range > > (and too frequently engaging AF Limiter with AGC Off). > > > > 73, > > Barry N1EU > > > > -- > > View this message in context: > > http://n2.nabble.com/K3-in-a-cw-pileup-needs-work-tp4523884p4527626.html > > Sent from the Elecraft 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:[email protected] > > > > 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:[email protected] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > > > > -- 73 Brendan EI6IZ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
