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7361Re: [BCD396XT] Re: A better understanding of P25 decoding

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  • John Stark
    Feb 11, 2013
    • 0 Attachment
      That depends on several factors Including type of soil and wetness of the soil here I have two 12 foot ground rods on each yagi and six on the disc one.


      Sent from my Verizon Wireless 4G LTE DROID

      William Edwards <firemann57@...> wrote:

      >What do you consider to be "proper grounding" on those Yagi antennas?
      >Bill E.
      >On Feb 11, 2013 2:43 PM, "John Stark" <johnstark@...> wrote:
      >
      >> **
      >>
      >>
      >> Directional beams as you put it work great IF installed and used properly.
      >> A Yagi antenna is exactly what is called for in the OP's case since they
      >> are right between two sites. Using a proper Yagi antenna and coax will get
      >> the right results. A lot of people will not properly ground the antenna and
      >> or use cheap coax, both of which defeat the purpose of using the yagi
      >> antenna. Poor or improper grounding lowers the antennas ability to receive
      >> signals and block unwanted signals as much as using poor quality coax
      >> affects reception.
      >> I use a yagi and being east of Indianapolis I still am able to receive
      >> some I'll Star com sites as well as many Ohio MARCS sites in addition to
      >> most of Indiana SAFET sites using the yagi. Some frequencies I can receive
      >> three or four different systems on. The antenna is only 25 feet up but it
      >> has proper grounding and 50 feet of LMR400 coax. On one frequency If I move
      >> the antenna one direction I pick up one site and then turn it 180 degrees
      >> I will get a different site yet both sites are almost the exact same
      >> distance from me and using the same power. Take the ground off and I don't
      >> get much of anything. Put the ground back and the site I am aimed at is
      >> nice and clear with no interference from the other site. If I used cheap
      >> coax with lousy shielding I'd get the same bad results as signals get
      >> through the shield from both sites as well as other signals degrading
      >> everything.
      >> In addition I am less than 1/4 mile from a cell tower and have four other
      >> cell towers within five miles. Three can be seen from my house. Add in an
      >> Indiana SAFET site five miles away that can also be seen from home yet even
      >> with all of that I can find the Control Channels for 150+ trunked systems
      >> and sites in good conditions using the yagi.
      >> The point being proper installation will do the job the OP needs to hear
      >> the site he wants to hear.
      >>
      >> Sent from my Verizon Wireless 4G LTE DROID
      >>
      >> dataman60435 dataman60435@...> wrote:
      >>
      >> >Its really experimental, digital is rough, not like regular freqys...I
      >> have had people send me email that directional beams did not work....I have
      >> a RS 25-1.3 grnd plane think its # 25-173 $29.00 with 35' RG6u in the attic
      >> and it receives three towers very well....I have the Channel Master 5094A
      >> (disc) up 25' with LMR400 and it works very well on same towers
      >> T102,126,113, and T125....Im too far south for T101-Dupage...I can also
      >> hear Chicago FD new 476-478 non trunked digital stuf...Took me awhile to
      >> figure out what to use....My own city joined Starcom and uses T113-Will Co
      >> but there "ENC" !....
      >> >
      >> >--- In BCD396XT@yahoogroups.com, Dan Simon wrote:
      >> >>
      >> >> Ok. Yes, I have gotten the feeling from some stuff I have read that I
      >> am right between towers. What is the best solution for that overall? Or is
      >> there one?
      >> >>
      >> >> Thanks!
      >> >> -Dan
      >> >> On Feb 10, 2013, at 2:01 PM, dataman60435 wrote:
      >> >>
      >> >> > I noticed ur in Geneva, im in Joliet, using outdoor antennas i
      >> monitor T113,102,126, the last one T126-Aurora u should be able to
      >> hear...T101-Dupage is very difficult to hear in alot of places...Even tho
      >> there is a new firmware upgrade if you don't hear the "CC" well ur not
      >> gonna hear Starcom Digital....My daughter is in Elgin, in the mobile going
      >> thru your town using the RS800 rubber duck T101-Lisle and in some spots i
      >> hear T115-Lake Co.....Your town is kind of in between towers.....
      >> >> >
      >> >> > --- In BCD396XT@yahoogroups.com, Dan Simon wrote:
      >> >> > >
      >> >> > > Yes I have. I am running 1.11.01, the newest firmware version.
      >> >> > >
      >> >> > > Thanks,
      >> >> > >
      >> >> > > -Dan
      >> >> > > On Feb 9, 2013, at 10:06 PM, Milton Engle wrote:
      >> >> > >
      >> >> > > > Have you installed the latest version firmware 1.11.something
      >> (requires
      >> >> > > > Updater version 3)?
      >> >> > > >
      >> >> > > > ----- Original Message -----
      >> >> > > > From: "kc9vzv" kc9vzv@>
      >> >> > > > To: BCD396XT@yahoogroups.com>
      >> >> > > > Sent: Saturday, February 09, 2013 10:13 PM
      >> >> > > > Subject: [BCD396XT] A better understanding of P25 decoding
      >> >> > > >
      >> >> > > > >I am trying to monitor StarCom21 in ILL but I am still (after
      >> about 3
      >> >> > > > >months of playing with settings) having issues with my scanner
      >> decoding the
      >> >> > > > >system. I upgraded my firmware and read through this
      >> >> > > > >
      >> http://wiki.radioreference.com/index.php/P25_audio_decode_level_adjustment,
      >> >> > > > >but I feel like I am missing something obvious because a lot of
      >> the
      >> >> > > > >transmissions are still garbled. Any thoughts?
      >> >> > > > >
      >> >> > > > > Thanks!
      >> >> > > > >
      >> >> > > > > -Dan, KC9VZV
      >> >> > > > >
      >> >> > > > >
      >> >> > > > >
      >> >> > > > > ------------------------------------
      >> >> > > > >
      >> >> > > > > Yahoo! Groups Links
      >> >> > > > >
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      >> >------------------------------------
      >> >
      >> >Yahoo! Groups Links
      >> >
      >> >
      >> >
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      >------------------------------------
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      >Yahoo! Groups Links
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