I've had several people ask me who "I.C.E." is. It stands for "Industrial Communication Engineers", and they make excellent filters and other products. http://www.iceradioproducts.com/
73, Jim KQ6EA --- On Fri, 7/3/09, yc...@yahoo.com <yc...@yahoo.com> wrote: From: yc...@yahoo.com <yc...@yahoo.com> Subject: Re: [Flexradio] PowerSDR "freeze" and AM Broadcast spurii on 40mwith Flex-5000? To: "Jim Jerzycke" <kq...@pacbell.net> Date: Friday, July 3, 2009, 8:06 PM Hi Jim, Could you send me link of ICE? 73, Syawal YC5UK Powered by Telkomsel BlackBerry® -----Original Message----- From: Jim Jerzycke <kq...@pacbell.net> Date: Fri, 3 Jul 2009 19:57:02 To: Stu Phillips<s...@ridgelift.com> Cc: <flexradio@flex-radio.biz> Subject: Re: [Flexradio] PowerSDR "freeze" and AM Broadcast spurii on 40m with Flex-5000? Hi, Stu I live a few miles away from "KNX 1070", which comes in about as strong as your BCI did. Not having the inclination to research and build a filter like you did, I bought one from I.C.E. *ALL* the funny noises I was hearing went away on my 5000A, and my noise floor dropped. Amazing what having a simple filter can do! 73, Jim KQ6EA --- On Fri, 7/3/09, Stu Phillips <s...@ridgelift.com> wrote: From: Stu Phillips <s...@ridgelift.com> Subject: Re: [Flexradio] PowerSDR "freeze" and AM Broadcast spurii on 40m with Flex-5000? To: "Bob McGwier" <rwmcgw...@gmail.com> Cc: flexradio@flex-radio.biz Date: Friday, July 3, 2009, 7:01 PM Bob, Close out report... I build a Hi-pass filter to the design that Gary Breed used for his K9AY pre-amp front end - the schematic is at: http://www.aytechnologies.com/TechData/FilterPreamp_160-80.pdf I haven't had a chance to run this on a Network Analyzer yet it's the same design I've used in the past with my K9AY loop. I put the filter into the RX1 receive loop and it nails the 40m BCI stone dead - the filter has > 50dB attenuation on AM860 (which today is coming in at -15 dBm on the inverted L!). I can't detect the loss on frequencies > 1.8 MHz - from looking at the return loss with an antenna analyzer, I'm guessing its 2dB or so - pretty flat to 50 MHz. Of course, the box and connectors cost more than 10x the actual components... not counting my time, still a cheaper solution than buying a commercial version. I suppose there is a good explanation as to why the FLEX 5000 needs this additional filter OUTBOARD... a small annoyance that hasn't detracted from the appreciation of a very fine piece of technology. Perhaps at some point FLEX can incorporate this on the switching matrix where the cost of the additional components would be < $1. So - case closed for me on the BCI. 73's Stu N6TTO -----Original Message----- From: Bob McGwier [mailto:rwmcgw...@gmail.com] Sent: Thursday, July 02, 2009 6:17 PM To: Stu Phillips Cc: flexradio@flex-radio.biz Subject: Re: [Flexradio] PowerSDR "freeze" and AM Broadcast spurii on 40m with Flex-5000? Stu: WOW, those are some signals. Yes, you will need the BCI filter. The front end is being hit pretty hard. And yes, you can put it into the loop and it will work perfectly. You have entirely too much gain in the radio for 160m-40m anyway so there will be no degradation. Try the buffer settings in the driver control panel to improve your sensitivity to stalls in your computer. Good luck! Bob N4HY _______________________________________________ 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.flex-radio.com/ Homepage: http://www.flex-radio.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.flex-radio.com/ Homepage: http://www.flex-radio.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.flex-radio.com/ Homepage: http://www.flex-radio.com/
