I have owned the Sdr 1000, two flex 3000's and the flex 5000 absolutely no RFI running a alpha 8410 and several solid state kw amps and tentec 425 amp. Inverted vs on 75,40,20,18,10 and log periodic .
I have computer and all items grounded at one spot to earth ground which was checked with a meger. I did have some issues with the DDR 1000's ,I had one of all three production runs. But they were with the cables staying pluged in the back. All in all I have been extremely happy with the lack of RFI. From what I have heard on here the people who have had a lot of trouble also with regular radios. Sent from my iPad On Dec 22, 2012, at 6:42 PM, "Dr. William J. Schmidt, II" <b...@wjschmidt.com> wrote: > I had a 3000 and a 5000 and the only way I could get the RF out of the 3000 > was to sell it... > > > Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ > > Owner - Operator > Big Signal Ranch > Staunton, Illinois > > email: b...@wjschmidt.com > > -----Original Message----- > From: FlexRadio [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of > Robert Costa > Sent: Saturday, December 22, 2012 5:54 PM > To: Lloyd Berg - N9LB; Flex Radio List; Flexedge > Subject: Re: [Flexradio] [FlexEdge] Suggestions - EMI/RFI Suppressors & > Ferrites > > Lloyd, > > I have a granite firewire cable. I have ferrites on everything elsee. Power > supply and all other cables. I was asking about what products people using > to eliminate the common mode currents of my coax. As I am actively working > on getting this fixed, I hope to see if there was someone that had the same > problem as I have and what they did to resolve it. I do not want to reinvent > the wheel or have some long and drawn out science fair. > > I may also have to rewire my microphone, I would like to have all of this > work completed soon. > > Then onto troubleshooting and fixing my Butternut HF9V. Right now I will > just stick to fixing the common mode currents on my dipole. That has been a > experience trying to dial the Butternut antenna in also. > > One challenge at a time. > > 73 > Robert > KB6QXM > > > ________________________________ > From: Lloyd Berg - N9LB <lloydb...@charter.net> > To: Flex Radio List <flexradio@flex-radio.biz>; Flexedge > <flexe...@flex-radio.biz> > Sent: Saturday, December 22, 2012 3:14 PM > Subject: Re: [Flexradio] [FlexEdge] Suggestions - EMI/RFI Suppressors & > Ferrites > > I had this problem when I first purchased my 5000A running more than about > 50 watts. It turned out that RF was getting into the firewire cable. > > I put ferrite chokes on each end of the firewire cable (three loops through > the hole), no more problems, now I can even run the Alpha amp at full power > 160m to 6m! I also put one on the microphone cable just for extra > insurance. Cost about $5 each. > > The ferrite chokes I used are: > > EMI/RFI Suppressors & Ferrites 257 OHM @100MHZ SPLIT FERRITE Mouser Part #: > 807-BF2930 Manufacturer Part #: BF2930 > > http://www.mouser.com, search on: BF2930 > > Unfortunately this number is now obsolete so you will have to look for the > current version of the same thing. > http://www.mouser.com/Passive-Components/EMI-RFI-Components/EMI-RFI-Suppress > ors-Ferrites/ > > You might even be able salvage the RF chokes that come attached to some > computer cables at no cost. > > 73 > > Lloyd - N9LB > > > -----Original Message----- > From: Flexedge [mailto:flexedge-boun...@flex-radio.biz]On Behalf Of Robert > Costa > Sent: Saturday, December 22, 2012 4:15 PM > To: Flex Radio List; Flexedge > Subject: [FlexEdge] Suggestions > > > All, > > As you may have seen from previous posts, that I have RF ingress issues on > my Flex 5000a restricting my use of the flex to 40 meters and below. As I > want to start addressing these issues, I would like to know what products > others have used. > > I need to eliminate common mode currents at the feedpoint of my 80-10 meter > dipole. I have seen Radio Works line isolators, but have been told that they > are not very effective. I have been told to use a W2DU current UNUN from a > company like the wireman. > > I am open to suggestions as I do not want this to be an extended engineering > science fair. > > As this RF ingress issue has been a complete irritating experience with my > Flex, I would like to hear who has used what and what the results and over > all costs have been. > > Thank you, > > Robert > KB6QXM > _______________________________________________ > Flexedge mailing list > flexe...@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz > This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used > for posting topics related to SDR software innovation and other technical > SDR topics. > > > _______________________________________________ > 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/
