RFI can occur when there is an impedance mismatch betweeen the transceiver and the antenna. Coax acts like it's actually three conductors....the center, inter shield and outer shield. Ofter, RF voltage feedback travels into the transceiver on the outer shield. Straight out of the ARRL handbook. Usually more noticable on 10 meters than on 80. Solution.....tweek the antenna for less that 1.5:1 VSWR. When computers are added to the equasion, RFI can be reduced with proper groundinng and toroid cores.
"White Man's Magic." Jim de nx4e On Thu, 11 Oct 2012 22:38:15 -0700 "=?utf-8?B?Um9iZXJ0IENvc3RhLCBLQjZRWE0=?=" <kb6...@yahoo.com> writes: > I have the same issue. Works on 80 and audio is distorted on 20 > meters. I'll bet it is RF ingress issues like mine. Now to determine > where the RF is coming into the radio. > > 73, > Robert > KB6QXM > "Ham Radio Open Conversation" > Yahoo group owner/moderator > > > ----- Reply message ----- > From: "Ken Akin" <kena...@gmail.com> > To: <aar...@gmail.com> > Cc: <flexradio@flex-radio.biz> > Subject: [Flexradio] New 5000a Owner Panic > Date: Thu, Oct 11, 2012 8:41 pm > > > Aaren - > > The "it works on 80, dies on 20" very much sounds like RF getting > into the > computer. Others can give you a list of things to check, but to > start with > - you need a short solid ground connection between the 5000 and the > PC. RF > in the shack may result from high swr, keeping RF off of the outside > of the > coax when it comes into the shack (using *Toroidal Chokes* on the > coax) > can help a lot. > > 73 > > Ken AC0HO > > > > On Thu, Oct 11, 2012 at 10:09 PM, Tony <d...@optonline.net> wrote: > > > Aaren: > > > > > > 1. Front mic port is DOA right out of the box. > >> > > > > Check to make sure that the notch on the mic connector is lined > up > > correctly with the port when you plug it in. I've noticed that > some > > connectors go in without the notch being aligned. > > > > Tony > > > > > > > > On 10/11/2012 10:54 PM, Aaren Jensen wrote: > > > >> I took delivery of a new 5000a with ATU 3 days ago and I'm having > a case > >> of > >> panic and potential buyers remorse. Please expound some wisdom or > talk me > >> off the cliff. > >> > >> > >> 1. Front mic port is DOA right out of the box. I've switched > to a xlr > >> mic plugged into the balanced port on the rear and I'm > clicking MOX > >> on and > >> off to transmit. It's a work around but it looks like I'll > already > >> have to > >> send it back straight away for repair. Arggh. I have a ticket > open > >> with > >> Flex and I'm waiting for approval to return it. > >> 2. Band conditions are horrible this week but for two nights > browsing > >> around 80m and 40m are it's working and no problems other > than my own > >> learning curve. > >> 3. Tonight I venture onto 20m and every time I key the mic > PowerSDR > >> freezes and crashes. Takes a few minutes to recover and > reboot > >> everything > >> and I try again with the same results. I was able to > participate on a > >> 80m > >> net with no problems, then back to 20m and more crashes. I > thought it > >> was > >> the power output and played with that, but no real pattern > emerged? > >> 4. At one point it locked up so bad I couldn't even start > PowerSDR > >> anymore and had to remove the entire software package, > reboot, > >> reinstall, > >> reboot, and treat the rig like it was a fresh first time > install > >> again. > >> Back to 20m with everything new and default, tuned, keyed mic > and app > >> crashes > >> > >> Help oh wise Elmers on the mountain top. > >> > >> 73 > >> > >> VA7AEJ > >> > >> > > > > ______________________________**_________________ > > FlexRadio Systems Mailing List > > FlexRadio@flex-radio.biz > > > http://mail.flex-radio.biz/**mailman/listinfo/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/<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/ > Jim Broaddus Bear Creek Feline Center (BCFC) Panama City, Florida USA 850 722-9927 ____________________________________________________________ How to Avoid Facelifts Discover New Face Lift Alternatives Without Going Under the Knife http://thirdpartyoffers.juno.com/TGL3141/5077ffdc77a927fdb5f94st02vuc _______________________________________________ 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/
