I have used the Heil Pro 7 also. While they displayed no RFI issues, they fall far behind the Bose QC35s, Radiosport, and even Bose QC25s in keeping out KPA1500 fan noise. They worked FB for me in the CQWW SSB test, where the KPA1500 fans rarely turn on, and never get louder than FAN1 at my station, running at 1300w out per LP100A mearurement
"FWIW, I have been using Heil Pro 7 headphones successfully for years. I use cw 95% of the time, including during quite a few enjoyable CWT events. I only occassionally use the mic and ssb mode. I own several pair that I use with their specific radios. I use them on my Elecraft K2, and KX2, my Yaesu FTDX3000D, and my LNR Mountaintopper 3, 4, and 5b transceivers. I never have the slightest RF or feedback. They are well worth buying and using. I highly recommend them. The radios without ssb, I don’t use the mic or mic plug but instead I keep it secured out of the way. Steve-KI4EZL" 73 Eric WD6DBM On Thu, Nov 18, 2021, 5:15 PM John Reilly <reill...@comcast.net> wrote: > I recently purchased a Bose QC-45. I used it for about 5 minutes in a > CWops contest, and got RF in the left headphone. I disconnected it, and > returned to my Bose QC-35's. The QC-45's have been returned to Amazon. > > I had a similar problem earlier in the year with the Bose 700 > headphones. I tried various toroids, but never could isolate them from > RF (particularly a problem on 40m). Obviously, this is is not something > Bose is concerned with. Fortunately, the QC-35 gamer headphones work > well. With all three headphones, I used the headphone cable (not > Bluetooth -> delay problem). FWIW, I like the Bose noise cancelling > because it does a good job attenuating KPA1500 fan noise. > > Has anyone used the Sony WH-1000XM3 headphones? How do they work in an > RF environment? > - 73, John, N0TA > ______________________________________________________________ > 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 > Message delivered to norrislawfi...@gmail.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 Message delivered to arch...@mail-archive.com
