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Mobile Sirio 5000 performer roof mount

Discussion in 'CB Antennas' started by free2fly973, May 9, 2019.

  1. free2fly973

    free2fly973 Member

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    I've bought this antenna to check out. I've checked continuity between center pins 0.0 good.
    Shield 0.0 good. And center pin to shield infinite good. That's the roof mount system.
    Then I add the base and coil system. Whip to center pin 0.0 continuity good. Pl259 shield to whip 0.0 bad. And last pl259 center pin to outer shell/ pl259 shield 0.0 bad. Or at least in most setup.
    My question is : are these the same results everyone else is getting that has and use this antenna? Mount checks out perfect until antenna base, coil, and whip is used. Same results when installing just 1 piece of the antenna at a time. Starting from base up.
    Antenna mount and base connectors are pl259 and so 239 type.
    Thanks for your time, knowledge, and experiments. lol.


     

  2. free2fly973

    free2fly973 Member

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    No one has a sirio 5000 roof mount they are running? Just needing to know if their center pin has continuity with their shield/ground after the installation. Or if any one knows its normal for these types of antennas to produce continuity between pin and ground.
    All the antenna systems I have worked with would not create this effect. This result in most antenwould be a bad thing.
    I was told NMO antennas do create continuity between pin and shield after antenna is installed on the roof mount, not before.
     
  3. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

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    Welcome to WWDX! I am currently running the Sirio 5000 with a mag mount on two different vehicles. I will see if I can unscrew one of them and measure it. I have seen antennas that have tuning networks that appear as a DC short but at high frequencies it is not a short. I don't know if the Sirio 5000 has this or if it is just a loading coil. I will try to check it out tomorrow. Maybe someone who has more experience with this antenna will chime in.
    Chris
     
    free2fly973 likes this.
  4. flatlander89

    flatlander89 Member

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    Yep.its normal.its part of the tuning network like Shapetree said.check sir and enjoy!
     
  5. w9cll

    w9cll W9WDX Amateur Radio Club Member

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    So I get by all this the antenna isn't working correctly for you?
     
  6. free2fly973

    free2fly973 Member

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    Thank you gentlemen for the response and conformation. Will be installing soon. My work interferes with my hobby.
     
  7. free2fly973

    free2fly973 Member

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    W9cll: I haven't installed yet . I was doing my regular testing out of the box, some stores won't except faulty equipment after x amount of time . I work a lot and don't really know when I'll be able to install.
    My predator 10k, monkey made, Wilson 5k, and others were set up different, I'm guessing. After total install; the pl259 connecting to the radio never had continuity between pin and shield/ground. This one does. My past experiences points to a shorted antenna. But those where 3/8-24 threads. This is a pl259 on the base of antenna, which the threads have continuity to the whip and center pin. When the roof mount thread (which does not have continuity with center pin, yet) contacts the base threads. Continuity at the pl259 to the radio occurs.
     
  8. undertaker

    undertaker Undertaker

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    I got one it will work...
     
    free2fly973 likes this.
  9. free2fly973

    free2fly973 Member

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    Thanks alot for for all y'alls help and time. Undertaker, w9cll, flatlander, shadetree. It's the only way a less knowledgeable people will learn, after research, and lots of time and experiments $$. I've been hooked on radios since the late 90's but mostly am radio trucking. Last 3 yrs ssd and dx, been thinking about amateur radio but keep getting snubbed off when I have ???'s. Oh, well . 73's
     
    Shadetree Mechanic likes this.
  10. free2fly973

    free2fly973 Member

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    Wow . Didnt realize I've been a member for 5.5 yrs, and this is the 1st thread and posts I've made. Been reading the mail and listening I guess lol. Learned a lot though. 73's
     
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  11. flatlander89

    flatlander89 Member

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    Sorry for the poor spelling.spell checker musta got meo_O
     
  12. flatlander89

    flatlander89 Member

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    I’m with ya 973.Radios sure can be fun and this is one of the best radio forums that I’ve found.if not THE best.Very knowledgeable people here.Hang in there and Keep workin on your license!
     
    free2fly973 likes this.
  13. M0GVZ

    M0GVZ Sr. Member

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    As said, what appears to be a direct short at DC isn't always with AC/RF. That's why using a DC meter to test an antenna is a mistake. There are plenty of perfectly good antennas that have been sent back to the seller because someone measured a dead short with an ohm meter. Likewise checking the continuity of the sections of the Imax 2000 which has a capacitor in the middle section. Do it with a digital meter and it'll show open circuit, do it with an analogue one and you'll see a spike and then the needle dropping to open circuit as the capacitor becomes charged - if you know what you're looking at you'll realise it has a capacitor in it.
     
  14. free2fly973

    free2fly973 Member

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    I'm no English teacher either lol.
     
    flatlander89 likes this.
  15. free2fly973

    free2fly973 Member

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    Thanks for the knowledge! I'll research how to properly test capacitors, besides the quick check you described (which is great info). And see if I can test mine for a capacitor. Can't wait to hook my new toy up to see what it can do! And compare to my other collections. FYI: my experience so far is predictor 10k has been the best. But a little heavy for a roof mount I think. And that's where I'm headed now. Probably wind up with a 3'-4', and swap out with this sirio 5k when I'm sitting and playing with dx/skip.
    Again thank you all.
     

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