I just tried stringing up a 30 dipole, new coax, etc instead of using the miracle MMD (which is an end fed antenna). Same problem, so it's not the antenna.
The mic cable is the stock cable from Heil, so I assume it's good and proper cable. Any other ideas from anybody? *B KK2QQ -----Original Message----- From: K0DAN [mailto:k0...@comcast.net] Sent: Sunday, December 05, 2010 12:44 PM To: Bradley Feldman; 'Bret Mills'; flexradio@flex-radio.biz Subject: Re: [Flexradio] New 5000A User - TX Audio (severe distortion) Issues You may want to try lifting the chassis ground off the XLR ground. Also remember XLR audio is balanced so you don't want either of the XLR mic pins grounded or tied to the shield or chassis. Sometimes NO ground at all on an XLR connector works....you get these ground loops and current floating around which makes the audio connection UNbalanced, and greats hum, RF paths, etc. Another thing...take a look at the innards of your mic cable. If it's an XLR, you should have twisted pair for the two mic leads, which may or may not be wrapped in a shield. For XLR, think of your audio line much as you would think of a balanced antenna & feedline. GL es 73 Dan K0DAN ----- Original Message ----- From: "Bradley Feldman" <brad...@bradleyloritheo.com> To: "'Bret Mills'" <bmil...@ecso.com>; <flexradio@flex-radio.biz> Sent: Sunday, December 05, 2010 10:53 AM Subject: Re: [Flexradio] New 5000A User - TX Audio (severe distortion) Issues > The PTT is connected properly to pins 5+6. Mic positive (XLR pin 2) is > connected to flex pin 8. Mic negative (XLR pin 3) and Mic Shield (XLR > pin > 1) are tied together at the flex side and go to flex pin 7. The barrel > on > the flex side isn't connected to anything. > > Does that sound correct? > > *B KK2QQ > > -----Original Message----- > From: Bret Mills [mailto:bmil...@ecso.com] > Sent: Sunday, December 05, 2010 11:45 AM > To: 'Bradley Feldman'; flexradio@flex-radio.biz > Subject: RE: [Flexradio] New 5000A User - TX Audio (severe distortion) > Issues > > Page 5 of the FLEX 5K's owners manual show the proper connections for the > FLEX-5000 MIC connector, I quote "Pin 5 is Chassis Ground, Pin 6 is PTT, > Pin > 7 MIC (-) Pin 8 MIC (+)". > Measure from the MIC itself and make sure they have the correct one > connected. > > 73's > Bret > WX7Y > > > > -----Original Message----- > From: Bradley Feldman [mailto:brad...@bradleyloritheo.com] > Sent: Sunday, December 05, 2010 9:25 AM > To: 'Bret Mills'; flexradio@flex-radio.biz > Subject: RE: [Flexradio] New 5000A User - TX Audio (severe distortion) > Issues > > On the Heil cable I'm using, the PTT is on pins 5+6. The mic is on pins > 7+8. Should the barrel of the connector be connect to anything? > > *B KK2QQ > > -----Original Message----- > From: Bret Mills [mailto:bmil...@ecso.com] > Sent: Sunday, December 05, 2010 10:57 AM > To: 'Bradley Feldman' > Subject: RE: [Flexradio] New 5000A User - TX Audio (severe distortion) > Issues > > Check the HEIL MIC adapter and MAKE sure that the MIC ground goes to the > radio MIC Ground and the PTT Ground goes to PTT Ground on the radio. > On a LOT of the HEIL adapters they wired the ground pins backwards and > this > may be the cause of your problems, on Yaesu radios this didn't make much > difference but on the FLEX it makes ALL the difference in the world. > Hope this helps and 73's and Happy Holidays > > Bret > WX7Y > > > > -----Original Message----- > From: flexradio-boun...@flex-radio.biz > [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Bradley Feldman > Sent: Sunday, December 05, 2010 8:37 AM > To: flexradio@flex-radio.biz > Subject: [Flexradio] New 5000A User - TX Audio (severe distortion) Issues > > I'm new to flex, sdr and this list. > > I have a brand new 5000A, fully loaded (including the VHF/UHF board). > Station is completely new -- new QTH, new Mic (PR 781), new temporary > antenna (Miracle MMD 30m). > > I've worked through issues on installation and receive and seem to have > those licked including using VAC with digital modes. Now I'm trying to > get > TX working right for working QRP until spring comes and I can set up my > Steppir Bigir that's sitting here in a box. > > I've been a ham since 1990, but have largely been on my own with regard to > setting up and solving shack problems-- I don't belong to any clubs at the > moment, so I appreciate any help I can get from this list with the issue I > describe below -- which may not be a "flex issue" but perhaps an ordinary > ham setup issue. I don't know. > > Here's the issue: When keying up and testing my mic in phone mode (I > don't > have a key set up), once there is enough audio level to drive some rf > output > power, I start to hear distortion in the audio-- it kind of sounds like > the > sound of a helicopter with echo and reverb that continues until I unkey. > > I've done Google searches, flex KB searches, forum searches and read the > flex troubleshooting guide to try and find a solution. Based on that > information, I've tried the following: I've grounded the radio to the PC > with ground strap. I installed RS ground loop isolators on all audio > connections to/from the radio and PC. I put extra ferrites on the PC side > of the stock flex firewire cable. > > The issue remains. Any ideas of what to do next or what additional info > is > necessary to help me? > > *Bradley KK2QQ > > > > > > > _______________________________________________ > 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/ > > -- > This message has been scanned for viruses and dangerous content by > MailScanner, and is believed to be clean. > > > -- > This message has been scanned for viruses and dangerous content by > MailScanner, and is believed to be clean. > > > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > > > _______________________________________________ > 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/
