All:
I did some testing with a $75 Rolls MX-28 three channel stereo mixer yesterday. Here are my thoughts using it to split the audio from my K3 and JRC NRD 525 for SO2R monitoring: You get what you pay for - At 100W, there is no RFI evident At 1500Wm I needed to add a number of #31 mix beads on the Power & audio I/O's to choke out RFI which manifested itself as a hum/buzz on CW and modulated junk on SSB. The pots @ full CCW are not infinite attenuation That being said - with the proper RF choking, the little mixer is OK for monitor use, but I would not put it in the airchain. For my airchain, I use a AirCorp 500 PH Pro Announcer Mike Processor which, as a pro device, has internal RFI mitigation. Most processors used for broadcast have this LF RFI mitigation so they can be used at a co-located AT tx/studio site. Russ KD4JO ________________________________ From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> on behalf of Jim Brown <j...@audiosystemsgroup.com> Sent: Saturday, January 13, 2018 12:29 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Mixer for audio On 1/13/2018 4:19 AM, G4GNX wrote: > Has anyone else done this and can recommend a unit that's as RF proof > as possible. I would start with any model of Rane or Mackie manufactured AFTER about 1998. That's around the time that both companies acknowledged their Pin One Problems and corrected them. I'm recommending these companies because their products don't have this problem. Most other products DO. 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmailman%2Flistinfo%2Felecraft&data=02%7C01%7C%7C9d79ba621496409fadda08d55aab496f%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636514614066907921&sdata=soZ8bd37020B3AX9Je14DxeCto7n%2FGjm0huxFtpOa2c%3D&reserved=0 Help: https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmailman.qth.net%2Fmmfaq.htm&data=02%7C01%7C%7C9d79ba621496409fadda08d55aab496f%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636514614066907921&sdata=DyLCMPidy5qvJUG6uyto19MuWMv1zc7ZaLDHh3eIIQs%3D&reserved=0 Post: mailto:Elecraft@mailman.qth.net This list hosted by: https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net&data=02%7C01%7C%7C9d79ba621496409fadda08d55aab496f%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636514614066907921&sdata=YGbUUWR6zrDRctRdbZnwAW81%2BdNOKk1HwQlvaP08vII%3D&reserved=0 Please help support this email list: https://nam04.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.qsl.net%2Fdonate.html&data=02%7C01%7C%7C9d79ba621496409fadda08d55aab496f%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636514614066907921&sdata=FRIutySs4MV3ufkWSPAqn2HzydioDO5oO6xEq78TWM8%3D&reserved=0 Message delivered to mundschen...@msn.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
