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

MAARC antenna replacement

Expand Messages
  • Al Pepping
    Hi all. A few questions have arisen regarding the status of the 2/440 antenna vertical at MAARC. There is going to be a new support built for the new antenna.
    Message 1 of 1 , Mar 21, 2007
    • 0 Attachment
      Hi all.
       
      A few questions have arisen regarding the status of the 2/440 antenna vertical at MAARC. 
       
      There is going to be a new support built for the new antenna.  Recommendation regarding distance from the antenna to the tower are 18 inches for 2 meters, we will most likely go 2 feet for extra isolation.  The antenna is also being placed on the south east side of the tower to provide the best coverage to the most users.  The antenna will require 2 insulated supports along the antenna itself to keep it from whipping against the tower in windy conditions.  We also have to consider length of the antenna and the extra windload with a larger unit, plus placement within the tower guys.  These factors are in the framing process but we need  to have the antenna in hand to  calculate final dimensions.  I have the Heliax and connectors.  I will be checking that they mate and seal properly plus do integrity checks on the total system (actual system power loss  and VSWR measurements).  Commscope commercial cellular grade connectors are being used.  By convention  N connector are used at these frequencies.   Once the entire system is checked out on terra firma,  we will have Ken do the climb.  This will be done before the next scheduled club event, the Michigan QSO party the 3rd week of April as VHF/UHF are major players in this event.
       
       
      ****** Thanks to Jim K8COP  donating   the Commscope connectors, and Tim KC8MSE for the Andrew Heliax, our cost so far is ZERO dollars.  We thank them wholeheartedly!!! *******
       
          Regarding 1.2 gHz, the April presentation at MAARC will cover what is happening at 1.2 gHz  with D-Star.  We do not need a dedicated internet connection via land line or cable at the cluhouse.  D-star handles 128kB/s data rate at 1.2 gHz, which is roughly twice the speed of the best dial up internet service.  The amateur service also allows us to do our own WiFi set ups at 1.2 gHz.  Nowadays, this is pretty much plug and play.   The antennas we are looking at are the Comet GP98 at $169.95  and the Diamond X6000A at $199.95.  You can check out the electrical specs on both antennas by going to Comet NCG or Diamond antennas websites.  I encourage those who have questions on the antennas to do your research PRIOR to the next meeting and bring your questions up at that time.  Feel free to  e-mail me with questions as well.
       
                                                                          Live long and communicate.......KV8X
       



       

        

       

       

       

       

       

                                                                                                                                                            

       

       

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