Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

BNC connectors

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

catignano(at)teletu.it
Guest

Posted: Fri Jan 28, 2011 9:58 pm Post subject: BNC connectors

Bob,

       

       I have become aware that BNC connectors have at least two flavors:       50 and 75 ohms.  Not being sure which impedance my connectors have       I measured the SWR for my com and vor antennas.  The com was 1.2       to 3.1 with the 3.1 at 118.0 mhz.  Above 119 mhz it was below 2.        The vor was between 1.1 and 1.9 over the full frequency range.        According to your book, they should be OK.  But what about GPS,       DME and transponder antennas.  Is the impedance of the connector       important?  In other words should I go to the trouble of making       sure all connectors are 50 ohms?

       

       John Herminghaus

           [quote][b]

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

nuckolls.bob(at)aeroelect
Guest

Posted: Fri Jan 28, 2011 10:20 pm Post subject: BNC connectors

At 12:52 AM 1/29/2011, you wrote:

  	  Quote: 	
		   Bob,



 I have become aware that BNC connectors have at least two flavors: 50 and 75 ohms.  Not being sure which impedance my connectors have I measured the SWR for my com and vor antennas.  The com was 1.2 to 3.1 with the 3.1 at 118.0 mhz.  Above 119 mhz it was below 2.  The vor was between 1.1 and 1.9 over the full frequency range.  According to your book, they should be OK.  But what about GPS, DME and transponder antennas.  Is the impedance of the connector important?  In other words should I go to the trouble of making sure all connectors are 50 ohms? 	


    The connectors are "50 ohm" because they

    have dimensions conducive to installation

    on a piece of 50 ohm coax. If your connector

    fits on the coax, then it's the right

    connector.



 

   Bob . . .    [quote][b]

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

catignano(at)teletu.it
Guest

Posted: Fri Jan 28, 2011 11:39 pm Post subject: BNC connectors

Thanks a lot.  That's what       I suspected and hoped to hear.  You saved me a lot ot trouble

     

     John

     

     On 29.01.2011 06:15, Robert L. Nuckolls, III wrote:     [quote]       At 12:52 AM 1/29/2011, you wrote:

        	  Quote: 	
		           Bob,

           

           I have become aware that BNC connectors have at least two           flavors: 50 and           75 ohms.  Not being sure which impedance my connectors have I           measured the SWR for my com and vor antennas.  The com was 1.2           to           3.1 with the 3.1 at 118.0 mhz.  Above 119 mhz it was below 2.            The vor was between 1.1 and 1.9 over the full frequency           range.            According to your book, they should be OK.  But what about           GPS, DME           and transponder antennas.  Is the impedance of the connector           important?  In other words should I go to the trouble of           making sure           all connectors are 50 ohms? 	
       

          The connectors are "50 ohm" because they

          have dimensions conducive to installation

          on a piece of 50 ohm coax. If your connector

          fits on the coax, then it's the right

          connector.

       

                

             Bob . . .                   	  Quote: 	
		  

	
       [b]

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum