Steven, I have had very good luck using an MFJ-1020C. It is advertised as an active antenna, and certainly can be used that way, but it is also a variable gain tunable preselector, from 300 KHz to 40 MHz. You can easily remove the little vertical antenna that is built into the device, and connect your regular outside antenna instead. Works great for me from DXing VLF aircraft non-directional beacons below 500 KHz to really being able to hear on the AM broadcast band.
One limitation: if you want to transmit you will need a relay to bypass the unit during transmit. I use mine only for receiving. Hope this helps. 73, Army - AE5P -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Steven L Hess Sent: Wednesday, June 01, 2011 5:42 PM To: [email protected] Subject: [Flexradio] BCB Filters and Receiver question. Would adding a BCB filter improve my receiver performance on 75 meter and up? Would it cut the general RF crud below 75 meters from entering my receiver and degrading it's performance?. I am in a urban environment and am trying to cut down the crud RF that reaches my Flex-3000. I notice that I.C.E. is not accepting orders at this time. Is there a alternate source as good a I.C.E. for a transceive BCB filter? If I disconnect my antenna system from the back of my F3K I notice I am getting a S-1 reading on my S meter on 30 meters. It varies by band with 160 being the first mark on the meter which I guess is a half an S-unit, 75 S-1, 60 S-2, 40 though 15 S-1 15 and 12 meters 1/2 a S-unit and 10 and 6 zero S-units. Is this the normal situation or is RF entering my rig by another path? Steven -- Sent from my Linux box. Regards de KC6KGE. A very happy Flex-3000 user. Skype flamebait Gmail flamebait at gmail dot com _______________________________________________ FlexRadio Systems Mailing List [email protected] 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 [email protected] 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/
