Loading ...
Sorry, an error occurred while loading the content.

Re: [FT897] RE: RE: odd random beeping during PSK31 TX, and all the audio level controls ??

Expand Messages
  • Chris-AD8F
    Back before I made my first RF choke from coax, I always thought it was a waste of time, then I figured out how to actually make it properly after I had RF
    Message 1 of 22 , Sep 29, 2013
    • 0 Attachment
      Back before I made my first RF choke from coax, I always thought it was a waste of time, then I figured out how to actually make it properly after I had RF problems...  After that, I always put an RF choke at all my antennas and have never had problems afterwards.

      If you look inside a 'real balun' depending on if it's 1:1 or 4:1, you may find it is similar to the RF choke idea.  If the RF choke works well, don't go out and buy a 'real balun' just because.  If it ain't broke...


      -Chris, AD8F


      On Sun, Sep 29, 2013 at 10:47 AM, <ericbnyc@...> wrote:
       

      Hi all,

       

      Want to chime in with some similar outcomes.  Running a 897/ldg897/Signalink usb and laptop into MP-1 Superantenna.  I have no roof access so I'm always portable or at least throwing a dipole out my  second story window.  I get the beeps and also just wind up getting my radio shutdown as soon as I start transmitting - was even happening on internal battery - so that's 20 watts! Someone else had once mentioned that this was a result of rf, getting back to the radio so I was attaching ferrites to everything and getting only sporadic improvement, and just chalked it up to 'radio is an art'.  Recently I have been trying to learn more about antennas and along the way was reading about baluns and chokes, etc.  Somewhere (multiple times, really) I had seen instances of people making loops out of coax to make a choke, so I tried that.  Made 3 or 4 - 12 inch diameter loops out of one end of my 25 foot rg8x cable on the end closer to the radio (milspec, because I'm always deploying and removing it outside, so it's thicker) and let the rest run to my antenna.  Voila!  End of beeps and shut downs.  Was wondering if inserting a real balun or unun or something instead of the cable loop somewhere would have same net effect?

       

      Currently running at about 85 watts, but I'll continue to experiment with the power/volume/alc settings mentioned above...



      ---In ft897@yahoogroups.com, <mrk.twg@...> wrote:

      Glad to have been able to help, Chris!

      Take care,

      Matt
      KK4CPS


    • ericbnyc
      Chris, Thanks for answering. My point is, if I can replace a 12 diameter coil for four loops of rg213 (not rg8x, apologies for error in my previous post - i
      Message 2 of 22 , Sep 30, 2013
      • 0 Attachment

        Chris,


        Thanks for answering.  My point is, if I can replace a 12" diameter coil for four loops of rg213 (not rg8x, apologies for error in my previous post - i checked my cable again.  i'm still a noob, made cable purchase on recommendation of salesman.  Trusting him worked out well, but I'm still learning specs and terminology for myself...) with a single, small balun, then I'm saving alot of weight when I carry this portable, and otherwise get about 5 feet of distance/length back on my cable to my antenna.


        This method worked great for last weekend's rtty contest.  i had a great time, limited only by the life of my laptop battery.  Not radio reboots :)


        Eric - ny2eb



        ---In ft897@yahoogroups.com, <chrcoe01@...> wrote:

        Back before I made my first RF choke from coax, I always thought it was a waste of time, then I figured out how to actually make it properly after I had RF problems...  After that, I always put an RF choke at all my antennas and have never had problems afterwards.

        If you look inside a 'real balun' depending on if it's 1:1 or 4:1, you may find it is similar to the RF choke idea.  If the RF choke works well, don't go out and buy a 'real balun' just because.  If it ain't broke...


        -Chris, AD8F


        On Sun, Sep 29, 2013 at 10:47 AM, <ericbnyc@...> wrote:
         

        Hi all,

         

        Want to chime in with some similar outcomes.  Running a 897/ldg897/Signalink usb and laptop into MP-1 Superantenna.  I have no roof access so I'm always portable or at least throwing a dipole out my  second story window.  I get the beeps and also just wind up getting my radio shutdown as soon as I start transmitting - was even happening on internal battery - so that's 20 watts! Someone else had once mentioned that this was a result of rf, getting back to the radio so I was attaching ferrites to everything and getting only sporadic improvement, and just chalked it up to 'radio is an art'.  Recently I have been trying to learn more about antennas and along the way was reading about baluns and chokes, etc.  Somewhere (multiple times, really) I had seen instances of people making loops out of coax to make a choke, so I tried that.  Made 3 or 4 - 12 inch diameter loops out of one end of my 25 foot rg8x cable on the end closer to the radio (milspec, because I'm always deploying and removing it outside, so it's thicker) and let the rest run to my antenna.  Voila!  End of beeps and shut downs.  Was wondering if inserting a real balun or unun or something instead of the cable loop somewhere would have same net effect?

         

        Currently running at about 85 watts, but I'll continue to experiment with the power/volume/alc settings mentioned above...



        ---In ft897@yahoogroups.com, <mrk.twg@...> wrote:

        Glad to have been able to help, Chris!

        Take care,

        Matt
        KK4CPS

      • Chris-AD8F
        Eric, I m glad that your radio stayed up and running during the contest! -Chris, AD8F
        Message 3 of 22 , Sep 30, 2013
        • 0 Attachment
          Eric,

          I'm glad that your radio stayed up and running during the contest!  

          -Chris, AD8F


          On Mon, Sep 30, 2013 at 8:04 AM, <ericbnyc@...> wrote:
           

          Chris,


          Thanks for answering.  My point is, if I can replace a 12" diameter coil for four loops of rg213 (not rg8x, apologies for error in my previous post - i checked my cable again.  i'm still a noob, made cable purchase on recommendation of salesman.  Trusting him worked out well, but I'm still learning specs and terminology for myself...) with a single, small balun, then I'm saving alot of weight when I carry this portable, and otherwise get about 5 feet of distance/length back on my cable to my antenna.


          This method worked great for last weekend's rtty contest.  i had a great time, limited only by the life of my laptop battery.  Not radio reboots :)


          Eric - ny2eb



          ---In ft897@yahoogroups.com, <chrcoe01@...> wrote:

          Back before I made my first RF choke from coax, I always thought it was a waste of time, then I figured out how to actually make it properly after I had RF problems...  After that, I always put an RF choke at all my antennas and have never had problems afterwards.

          If you look inside a 'real balun' depending on if it's 1:1 or 4:1, you may find it is similar to the RF choke idea.  If the RF choke works well, don't go out and buy a 'real balun' just because.  If it ain't broke...


          -Chris, AD8F


          On Sun, Sep 29, 2013 at 10:47 AM, <ericbnyc@...> wrote:
           

          Hi all,

           

          Want to chime in with some similar outcomes.  Running a 897/ldg897/Signalink usb and laptop into MP-1 Superantenna.  I have no roof access so I'm always portable or at least throwing a dipole out my  second story window.  I get the beeps and also just wind up getting my radio shutdown as soon as I start transmitting - was even happening on internal battery - so that's 20 watts! Someone else had once mentioned that this was a result of rf, getting back to the radio so I was attaching ferrites to everything and getting only sporadic improvement, and just chalked it up to 'radio is an art'.  Recently I have been trying to learn more about antennas and along the way was reading about baluns and chokes, etc.  Somewhere (multiple times, really) I had seen instances of people making loops out of coax to make a choke, so I tried that.  Made 3 or 4 - 12 inch diameter loops out of one end of my 25 foot rg8x cable on the end closer to the radio (milspec, because I'm always deploying and removing it outside, so it's thicker) and let the rest run to my antenna.  Voila!  End of beeps and shut downs.  Was wondering if inserting a real balun or unun or something instead of the cable loop somewhere would have same net effect?

           

          Currently running at about 85 watts, but I'll continue to experiment with the power/volume/alc settings mentioned above...



          ---In ft897@yahoogroups.com, <mrk.twg@...> wrote:

          Glad to have been able to help, Chris!

          Take care,

          Matt
          KK4CPS


        • Joel
          I would submit that a dipole with a 1:1 center (current or voltage) balun performs better ( better pattern ) than one that has a choke coil of coax below the
          Message 4 of 22 , Sep 30, 2013
          • 0 Attachment
            I would submit that a dipole with a 1:1 center (current  or voltage)  balun performs better ( better pattern ) than one
            that has a choke coil of coax below the feed point.  

            The center balun works to provide an equal signal to both sides of the antenna.

            The choke balun only serves to limit RF from traveling down the shield back to the antenna.

            There is a different reasoning for the use of each, IMO.  I use the coil method on my  portable
            6 meter dipole as I don't have a balun that is good at that frequency.  I use clamp on toroids
            at the feed point of my 6M square dipole and VHF / UHF antenna.

            I have one of these LDG / RBA baluns and it is very lightweight and good for a temp small dipole.  The
            give them out free when you buy a LDG tuner by the way.

            http://www.universal-radio.com/catalog/antsup/2046.html

            I also have had good success with W2AU  baluns but they are bulkier with a higher power rating. The one
            advantage of the W2AU is that its a DC grounded design ( Trifilar ) so you do not need a separate lightning / surge
            supressor.  The RBA is just a simple toroid design.

            73

            Joel
            KQ0J




            On 9/30/2013 7:04 AM, ericbnyc@... wrote:
             

            Chris,


            Thanks for answering.  My point is, if I can replace a 12" diameter coil for four loops of rg213 (not rg8x, apologies for error in my previous post - i checked my cable again.  i'm still a noob, made cable purchase on recommendation of salesman.  Trusting him worked out well, but I'm still learning specs and terminology for myself...) with a single, small balun, then I'm saving alot of weight when I carry this portable, and otherwise get about 5 feet of distance/length back on my cable to my antenna.


            This method worked great for last weekend's rtty contest.  i had a great time, limited only by the life of my laptop battery.  Not radio reboots :)


            Eric - ny2eb



            ---In ft897@yahoogroups.com, <chrcoe01@...> wrote:

            Back before I made my first RF choke from coax, I always thought it was a waste of time, then I figured out how to actually make it properly after I had RF problems...  After that, I always put an RF choke at all my antennas and have never had problems afterwards.

            If you look inside a 'real balun' depending on if it's 1:1 or 4:1, you may find it is similar to the RF choke idea.  If the RF choke works well, don't go out and buy a 'real balun' just because.  If it ain't broke...


            -Chris, AD8F


            On Sun, Sep 29, 2013 at 10:47 AM, <ericbnyc@...> wrote:
             

            Hi all,

             

            Want to chime in with some similar outcomes.  Running a 897/ldg897/Signalink usb and laptop into MP-1 Superantenna.  I have no roof access so I'm always portable or at least throwing a dipole out my  second story window.  I get the beeps and also just wind up getting my radio shutdown as soon as I start transmitting - was even happening on internal battery - so that's 20 watts! Someone else had once mentioned that this was a result of rf, getting back to the radio so I was attaching ferrites to everything and getting only sporadic improvement, and just chalked it up to 'radio is an art'.  Recently I have been trying to learn more about antennas and along the way was reading about baluns and chokes, etc.  Somewhere (multiple times, really) I had seen instances of people making loops out of coax to make a choke, so I tried that.  Made 3 or 4 - 12 inch diameter loops out of one end of my 25 foot rg8x cable on the end closer to the radio (milspec, because I'm always deploying and removing it outside, so it's thicker) and let the rest run to my antenna.  Voila!  End of beeps and shut downs.  Was wondering if inserting a real balun or unun or something instead of the cable loop somewhere would have same net effect?

             

            Currently running at about 85 watts, but I'll continue to experiment with the power/volume/alc settings mentioned above...



            ---In ft897@yahoogroups.com, <mrk.twg@...> wrote:

            Glad to have been able to help, Chris!

            Take care,

            Matt
            KK4CPS

            No virus found in this message.
            Checked by AVG - www.avg.com
            Version: 2014.0.4142 / Virus Database: 3604/6704 - Release Date: 09/27/13


            -- 
            KQØJ
          • Chris-AD8F
            Thank you for your input Joel. When I built my first dipole awhile back, I didn t really worry about the balun until I started having RF problems at times.
            Message 5 of 22 , Sep 30, 2013
            • 0 Attachment
              Thank you for your input Joel.  When I built my first dipole awhile back, I didn't really worry about the balun until I started having RF problems at times.  So my dipole was already built and I just used the RF choke setup to be done with it quickly.  I have recently been deciding whether or not I really want to worry about redoing it all.

              The consensus is that right now I don't NEED to worry about it because my signals seems to be received well but the efficiency of the antenna system is not as good as it can be.  Therefore, I decided I really WANT to make it as good as I can with the space I have to work with.  So I will probably end up rebuilding it eventually, but right now I'm still stuck at "if it ain't broke..." .. well a mix of that and a lack of time!

              It could be a much more efficient antenna system if I redid all of this of course, so that is a big draw to make me want to fix it up.

              -Chris, AD8F


              On Mon, Sep 30, 2013 at 1:05 PM, Joel <hiqual@...> wrote:
               

              I would submit that a dipole with a 1:1 center (current  or voltage)  balun performs better ( better pattern ) than one
              that has a choke coil of coax below the feed point.  

              The center balun works to provide an equal signal to both sides of the antenna.

              The choke balun only serves to limit RF from traveling down the shield back to the antenna.

              There is a different reasoning for the use of each, IMO.  I use the coil method on my  portable
              6 meter dipole as I don't have a balun that is good at that frequency.  I use clamp on toroids
              at the feed point of my 6M square dipole and VHF / UHF antenna.

              I have one of these LDG / RBA baluns and it is very lightweight and good for a temp small dipole.  The
              give them out free when you buy a LDG tuner by the way.

              http://www.universal-radio.com/catalog/antsup/2046.html

              I also have had good success with W2AU  baluns but they are bulkier with a higher power rating. The one
              advantage of the W2AU is that its a DC grounded design ( Trifilar ) so you do not need a separate lightning / surge
              supressor.  The RBA is just a simple toroid design.

              73

              Joel
              KQ0J





              On 9/30/2013 7:04 AM, ericbnyc@... wrote:
               

              Chris,


              Thanks for answering.  My point is, if I can replace a 12" diameter coil for four loops of rg213 (not rg8x, apologies for error in my previous post - i checked my cable again.  i'm still a noob, made cable purchase on recommendation of salesman.  Trusting him worked out well, but I'm still learning specs and terminology for myself...) with a single, small balun, then I'm saving alot of weight when I carry this portable, and otherwise get about 5 feet of distance/length back on my cable to my antenna.


              This method worked great for last weekend's rtty contest.  i had a great time, limited only by the life of my laptop battery.  Not radio reboots :)


              Eric - ny2eb



              ---In ft897@yahoogroups.com, <chrcoe01@...> wrote:

              Back before I made my first RF choke from coax, I always thought it was a waste of time, then I figured out how to actually make it properly after I had RF problems...  After that, I always put an RF choke at all my antennas and have never had problems afterwards.

              If you look inside a 'real balun' depending on if it's 1:1 or 4:1, you may find it is similar to the RF choke idea.  If the RF choke works well, don't go out and buy a 'real balun' just because.  If it ain't broke...


              -Chris, AD8F


              On Sun, Sep 29, 2013 at 10:47 AM, <ericbnyc@...> wrote:
               

              Hi all,

               

              Want to chime in with some similar outcomes.  Running a 897/ldg897/Signalink usb and laptop into MP-1 Superantenna.  I have no roof access so I'm always portable or at least throwing a dipole out my  second story window.  I get the beeps and also just wind up getting my radio shutdown as soon as I start transmitting - was even happening on internal battery - so that's 20 watts! Someone else had once mentioned that this was a result of rf, getting back to the radio so I was attaching ferrites to everything and getting only sporadic improvement, and just chalked it up to 'radio is an art'.  Recently I have been trying to learn more about antennas and along the way was reading about baluns and chokes, etc.  Somewhere (multiple times, really) I had seen instances of people making loops out of coax to make a choke, so I tried that.  Made 3 or 4 - 12 inch diameter loops out of one end of my 25 foot rg8x cable on the end closer to the radio (milspec, because I'm always deploying and removing it outside, so it's thicker) and let the rest run to my antenna.  Voila!  End of beeps and shut downs.  Was wondering if inserting a real balun or unun or something instead of the cable loop somewhere would have same net effect?

               

              Currently running at about 85 watts, but I'll continue to experiment with the power/volume/alc settings mentioned above...



              ---In ft897@yahoogroups.com, <mrk.twg@...> wrote:

              Glad to have been able to help, Chris!

              Take care,

              Matt
              KK4CPS

              No virus found in this message.
              Checked by AVG - www.avg.com
              Version: 2014.0.4142 / Virus Database: 3604/6704 - Release Date: 09/27/13


              -- 
              KQØJ


            Your message has been successfully submitted and would be delivered to recipients shortly.