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RG58 vs. RG59

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airlincoln(at)sbcglobal.n
Guest

Posted: Wed Sep 09, 2009 8:21 am Post subject: RG58 vs. RG59

I am assembling an APRS system.  I have created an J-pole antenna out of 300 ohm twin-lead cable (designed to send out short 144.39 MHz data transmissions) and have soldered onto that a short (18 inch) length of RG-58 coax..I note that AEC recommends RG-58 over RG-59 due to the latter's higher impedance.  To connect the coax to the APRS module requires a female SMA connector -- I found one at Radio Shack that says it is designed for crimping onto RG-58 cable...so far so good.  I've been to three local stores and can only find strippers/crimpers for RG-59 cable.  However, the ones I find online make it sound like tools for RG-58 and RG-59 cable are interchangeable.  I also note from Wikipedia [http://en.wikipedia.org/wiki/Coaxial_cable] that RG-58 and RG-59 cable have slight differences in their inner, outer and dielectric  diameters. 



Question #1:  Can I successfully use an RG-59 stripper/crimper to attach an SMA connector to RG-58 cable or do I need to find a tool specifically designed for RG-58 cable?

Question #2:  Will a crimping tool work equally well with BNC and SMA connectors or do I need separate tools for each?

Bonus question:  Would my J-pole antenna perform better laying flat (horizontal) in my fiberglass wingtip or looped around the leading edge so it has some "vertical polarization"?

Thanks to whoever can provide guidance.

Lincoln Keill

RV-7A Fuselage

Do Not Archive

 [quote][b]

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frank.hinde(at)hp.com
Guest

Posted: Wed Sep 09, 2009 8:46 am Post subject: RG58 vs. RG59

I bought my RG 58 BNC crimper from Radio Shack for about 11  bucks I think..Just in case that will work.

  

 Frank



   From:  owner-aeroelectric-list-server(at)matronics.com  [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of  Lincoln Keill

Sent: Wednesday, September 09, 2009 9:17  AM

To: aeroelectric-list(at)matronics.com

Subject:  RG58 vs. RG59

 

            I am assembling an APRS system.  I have created an        J-pole antenna out of 300 ohm twin-lead cable (designed to send out short        144.39 MHz data transmissions) and have soldered onto that a short (18        inch) length of RG-58 coax..I note that AEC recommends RG-58 over RG-59        due to the latter's higher impedance.  To connect the coax to the        APRS module requires a female SMA connector -- I found one at Radio Shack        that says it is designed for crimping onto RG-58 cable...so far so good.         I've been to three local stores and can only find strippers/crimpers        for RG-59 cable.  However, the ones I find online make it sound like        tools for RG-58 and RG-59 cable are interchangeable.  I also note        from Wikipedia [http://en.wikipedia.org/wiki/Coaxial_cable] that RG-58 and        RG-59 cable have slight differences in their inner, outer and dielectric        diameters.        



       Question #1:  Can I successfully use an RG-59 stripper/crimper        to attach an SMA connector to RG-58 cable or do I need to find a tool        specifically designed for RG-58 cable?

       



       Question #2:  Will a crimping tool work equally well with BNC        and SMA connectors or do I need separate tools for each?

       



       Bonus question:  Would my J-pole antenna perform better laying        flat (horizontal) in my fiberglass wingtip or looped around the leading        edge so it has some "vertical polarization"?

       



       Thanks to whoever can provide guidance.

       



       Lincoln Keill

       RV-7A Fuselage

       



       Do Not Archive

[quote]



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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Sep 09, 2009 10:08 am Post subject: RG58 vs. RG59

At 11:17 AM 9/9/2009, you wrote:

 	  Quote: 	
		  I am assembling an APRS system.  I have created an J-pole antenna 

out of 300 ohm twin-lead cable (designed to send out short 144.39 

MHz data transmissions)


	


  Why so mechanically complex an antenna in an airplane?

  We're talking VHF which is line of sight. What leads

  you to believe that this device will perform any better

  than a simple 1/4-wave vertical used in VHF communications

  applications?



 	  Quote: 	
		  and have soldered onto that a short (18 inch) length of RG-58 

coax..I note that AEC recommends RG-58 over RG-59 due to the 

latter's higher impedance.


	


   RG58's 50 ohm characteristic impedance has been

   generally adopted by the electronics industry

   as the design of choice for power handling capability

   while the RG58's 75 ohm impedance is favored for

   lower loss.  The later is used in television and

   low level signal situations.



 	  Quote: 	
		     To connect the coax to the APRS module requires a female SMA 

 connector -- I found one at Radio Shack that says it is designed 

 for crimping onto RG-58 cable...so far so good.  I've been to three 

 local stores and can only find strippers/crimpers for RG-59 

 cable.  However, the ones I find online make it sound like tools 

 for RG-58 and RG-59 cable are interchangeable.  I also note from 

 Wikipedia [http://en.wikipedia.org/wiki/Coaxial_cable] that RG-58 

 and RG-59 cable have slight differences in their inner, outer and 

 dielectric diameters.


	


   Yes, connectors, strippers and application tools are

   specific to the dimensions of the coax . . .



 	  Quote: 	
		  Question #1:  Can I successfully use an RG-59 stripper/crimper to 

attach an SMA connector to RG-58 cable or do I need to find a tool 

specifically designed for RG-58 cable?


	


   You need the right tool . . .



 	  Quote: 	
		  Question #2:  Will a crimping tool work equally well with BNC and 

SMA connectors or do I need separate tools for each?


	


   It's brand and part number specific. While MOST

   manufacturer's of RG58 compatible connectors will

   crimp the shield/pin grips with a .068"/.113" hexes,

   it's not automatic. You need to match the tool with the

   connector.

 	  Quote: 	
		  Bonus question:  Would my J-pole antenna perform better laying flat 

(horizontal) in my fiberglass wingtip or looped around the leading 

edge so it has some "vertical polarization"?



Thanks to whoever can provide guidance.


	


   Please consider a single run of RG400 from the accessory

   to a simple 1/4-wave antenna on a ground plane fabricated

   as described in many resources including the chapter

   on antennas in the AeroElectric Connection.



   You can get a compatible SMA male here:



http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=ACX1192-ND



   You can get a BNC male and the tool to install both

   connectors at:



http://bandc.biz



        Bob . . .



         ---------------------------------------

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

         ---------------------------------------

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