Absolute ...most of the Behringer pre-audio enhancement equipment suffer from weak power supplies...yes; a couple of Ferrite Blocks will take care of the issue, also you can examine the supply and install a couple of .01 capacitors.... Bill .... KC4PE
-----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Tim Ellison, W4TME Sent: Thursday, February 23, 2012 10:10 PM To: flexradio@flex-radio.biz Subject: Re: [Flexradio] Behringer DEQ2496 RFI Spikes Pin 1 problem? http://pin1problem.com/ RF coming through the AC safety ground (ground loop)? Tim Ellison, W4TME Product Management, Sales & Support FlexRadio Systems^(TM) 4616 W Howard Ln, Suite 1-150 Austin, TX 78728 Phone: 512-535-4713 Ext. 223 Email: t...@flexradio.com <mailto:t...@flexradio.com> Web: www.flexradio.com <http://www.flexradio.com> logo On 2/23/2012 10:06 PM, Michael Walker wrote: > Hi Mark > > Sounds like you may need to install some Mix 31 and Mix 43 torroids to > start to knock the RF down. Since it is worse with the Amp on, it seems > related to RFI. > > I would start with each and every power lead and then work on the audio > leads. > > Google YCCC and Choke and you will find the PDF that Chuck W1HIS assembled. > You will find it very informative. > > Mike va3mw > > > On Thu, Feb 23, 2012 at 9:20 PM, Mark Weidhaas<mweidh...@cox.net> wrote: > >> I have been trying to integrate a Behringer DEQ2496 into my audio chain >> with >> my Flex 5000A. My shack is on the second floor of my house so RFI is a >> constant problem. Using only my Behringer Xenyx802 mixer board and my 5000A >> there are no major RFI problems. I have isolated the 802 from the ballanced >> line input on the 5000A with a Jensen JT-11P-1 audio transformer. When I >> add >> the DEQ2496 I get an RFI spike at about 2~3 Hz. I can see the spike on both >> the 5000A panadapter and on an oscilloscope tapped at my 811H amp output. I >> have tried various audio isolation techniques but no joy. The spiking is >> the >> most pronounced with the amp on. Has anyone encountered this issue and >> solved this problem ? if so please advise. >> >> Mark Weidhaas >> W7MGW >> TRA 11810 / NAR 87698 / L3 >> Mobile: (602) 300-5114 >> mweidh...@cox.net >> >> _______________________________________________ >> FlexRadio Systems Mailing List >> FlexRadio@flex-radio.biz >> http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz >> Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ >> Knowledge Base: http://kc.flexradio.com/ Homepage: >> http://www.flexradio.com/ >> > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
