Antenna Problem

k2at
k2at Posts: 9
edited October 2004 in Speakers
I am new to the board, but nevertheless have managed to get myself a problem. More specifically, I just purchased a Denon 3805 and have a wierd problem. If I hook up an indoor antenna which came with the rig, it works great (the indoor cable is just a verticle piece of wire with no ground. However when I go to hook up my outdoor antenna with 75 ohm antenna coax, the radio does not work. If I connect the center lead of the coax to the radio, all is well, however as soon as I try to screw on the antenna, it dies. Obviously, the radio does not like to have the shield part of the coax connected. I also peeled back the shielding on my 75 ohm cable, screwed on the connector which did not come into contact with the shielding (ground) and it worked fine. I tried a number of indoor wires with no shields and a number of pieces of coax with the shields with the same results. What is going on? Help! Mel
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  • mrmusicman
    mrmusicman Posts: 303
    edited October 2004
    The only help I can offer is switch to XM.:D
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  • k2at
    k2at Posts: 9
    edited October 2004
    Switching to X/M is an option, but not a viable one as my new Denon 3805 is all of three days old. My wife might not approve.
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  • mrmusicman
    mrmusicman Posts: 303
    edited October 2004
    Well,if the wife doesn't approve switch her out.:D
    Outlaw 990 Processor
    Outlaw 755 Amp
    Denon 2900 dvd-sacd
    Dishnetwork HD-Dvr
    55" Sony LCD RPTV
    Lsi 9-fronts
    Lsic-center
    Rt55i- surrounds
    Velodyne cht-10 sub

    2007 Dodge Quad cab
    Kenwood Excelon KDC-X891
    JL Audio 300/V2
    Polk Audio SR 6500 - Fronts
    Polk Audio DB651 - Rear
    2 -10" Treo Subs
    Interfire IB 2600C sub amp
    Sirius Sat radio
    Ipod connection
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  • Willow
    Willow Posts: 11,056
    edited October 2004
    do you have cable TV ?

    if so you can buy a coax splitter run one for TV and hook the other one up to the back of the receiver for radio. That is how mine is and I get channels from all over the place that a reg antenna won't give.
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  • k2at
    k2at Posts: 9
    edited October 2004
    I was actually going to try splitting the coax, but that won't reslove my problem regarding the receiver not wanting to see a grounded shield on the coax. As I stated in prior message, the coax works if I strip back the shielding and only use the center conductor, but when Crimp on a connector using the center conductor and the shielding (ground), the receiver goes south on me.

    Where are the days when u bought a boombox and just plugged it in?

    Mel
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  • Willow
    Willow Posts: 11,056
    edited October 2004
    now is the back of your receiver for a twist on coax or do you need an adaptor ? my bedroom system needed an adaptor that is not a screw on type but a push on type.
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  • steveinaz
    steveinaz Posts: 19,538
    edited October 2004
    That is strange. Did you buy the tuner new? Are you sure the coax cable isn't shorted?
    Source: Bluesound Node 2i - Preamp/DAC: Benchmark DAC2 DX - Amp: Parasound Halo A21 - Speakers: MartinLogan Motion 60XTi - Shop Rig: Yamaha A-S501 Integrated - Shop Spkrs: Elac Debut 2.0 B5.2
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  • k2at
    k2at Posts: 9
    edited October 2004
    Mine is for a screw on type, but I do not see where that would make a difference. The indoor antenna which came with the Denon is a push on antenna and it does work, but I believe that is because there is not ground to the indoor antenna. All it is is a piece of shielded wire with a coax connector on it.
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  • k2at
    k2at Posts: 9
    edited October 2004
    Tuner is new and used too many pieces of coax for them all to be shorted. Tuner works great with screw on coax as long as tuner does not come into contact with the braid on the coax. I will check with Denon to c what is going on.

    Mel
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  • Willow
    Willow Posts: 11,056
    edited October 2004
    Originally posted by k2at
    Mine is for a screw on type, but I do not see where that would make a difference. The indoor antenna which came with the Denon is a push on antenna and it does work, but I believe that is because there is not ground to the indoor antenna. All it is is a piece of shielded wire with a coax connector on it.


    sorry I didn't explain myself properly, as the connector would make a difference , but it's not the case here...hmm good luck
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited October 2004
    Originally posted by k2at
    I will check with Denon to c what is going on.

    Mel
    Good move...

    Only thing that came to my devious little mind is hitting the jack on your AVR with a couple wraps of teflon tape as used in screwed pipe joints. It would insulate the AVR from the shielding...

    Please post Denon's response...

    EDIT: What's this thread doing in "Speakers"??? (Been a long time since I busted a Newbie for wrong area posting.... :D )

    Welcome to the Forum, k2...
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
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  • k2at
    k2at Posts: 9
    edited October 2004
    My apologies to placing this antenna issue on this board. I am a newbie to the board and a slow learner to boot. I am pretty gud a one trial learning, so I do not believe this issue will rear its ugly face anymore. Sori

    Teflon did not work as the screw on cut thru. Peeling back the braid accomplishes the same thing, but the Denon still has a problem.

    When I get it resolved, I will report back, if I can figure out where to post it. HI HI

    Mel
    NJ
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  • dorokusai
    dorokusai Posts: 25,577
    edited October 2004
    The threaded connector is called an " F " connector.

    You could strip the insulation off the ends, about an inch, and clip the shielding away from the connector. The shielding is typically right under the outer insulation. Just tape it back up to make it pretty again.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • k2at
    k2at Posts: 9
    edited October 2004
    I did peel back the shield so it does not come in contact with the F connector and the radio works great. The question though is what am I losing by not having the braid connected to the F connector??

    Mel
    NJ
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  • dorokusai
    dorokusai Posts: 25,577
    edited October 2004
    Nothing.

    Worst case scenario, which would occur even with it grounded, would be if lightning struck your outdoor antenna.

    You should use some sort of surge suppression or buffer if you are connecting anything to an outdoor strike potential.

    Likely? No. Possible? Sure.

    I'm being general, but I think you get my drift.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • k2at
    k2at Posts: 9
    edited October 2004
    Tnx for info and the shield and lightning. That is exactly what I thought and I purchased a tripp-lite surpressor for all the equipment including the antenna lead, but now cannot use it because of the shield problem. Life is a real bummer, then u die.
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  • dorokusai
    dorokusai Posts: 25,577
    edited October 2004
    Regardless of using the shield you should employ the Tripplite unit. I presume it's a full size unit, not an adapter?

    The shield is for grounding, but believe me, lightning goes wherever the hell it wants when striking, and it will certainly use that center conductor.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • TroyD
    TroyD Posts: 13,083
    edited October 2004
    Lightening is sorta like a P.O.'d rhino.

    Nothing more serious than a rhino about to charge your a$$

    BDT
    I plan for the future. - F1Nut
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  • HBombToo
    HBombToo Posts: 5,256
    edited October 2004
    Originally posted by TroyD
    Lightening is sorta like a P.O.'d rhino.

    Nothing more serious than a rhino about to charge your a$$

    BDT

    ***:D LOL:D ***
    ***WAREMTAE***
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited October 2004
    Originally posted by k2at
    My apologies to placing this antenna issue on this board. I am a newbie to the board and a slow learner to boot. I am pretty gud a one trial learning, so I do not believe this issue will rear its ugly face anymore. Sori
    Mel,
    Just Polkin' a little (pun intended)... the welcome was sincere...
    At least you didn't post an ebay link to your used antenna wire...
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
    · Share on FacebookShare on Twitter