| Author |
Message |
    
Apocolypse400
| | Posted on Monday, September 01, 2003 - 12:21 pm: | 
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With a multimeter the A-99 shows a dead ground across the center conductor to the shield. Anyway to fix this or should just trash it and buy a new one?
Thanks
Steve |
ryan
| | Posted on Monday, September 01, 2003 - 4:32 pm: |
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trash it. treat yourself a maco or something nice like that and a 50' tower |
Scrapiron63
| | Posted on Monday, September 01, 2003 - 5:48 pm: |
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Hey, there's nothing wrong with that antenna, its suppose to show shorted. Most gp's will, and mobile antennas. scrapiron |
ryan
| | Posted on Monday, September 01, 2003 - 5:54 pm: |
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hey, im just trying to help a guy get past the wife with a new antenna
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Gage
| | Posted on Monday, September 01, 2003 - 6:09 pm: |
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Apocolypse400
I would go with the I-max-2000.I've had a-99 and they dont compare to the Imax-2000.
To set the swrs,i just left the rings a lone and locked them.I cant tell how good the swrs are.The range from 27.900-26.000 is very good.
I hope this helps you. |
Kc0gxz
| | Posted on Monday, September 01, 2003 - 6:17 pm: |
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Apocolypse400
A dead ground?? Do you mean maybe a dead short? Some antennas will show some kind of continuity where others wont.
With the I-max and A-99 both using capacitance grounding, you will more than likely see some kind of continuity on your Ohm meter across the center conductor and shield.
Before you throw away a possibly working antenna, bolt it to a pole in your yard and do a quick SWR check on it. If the SWR meter shows infinity, it's junk.
I have my doubts though that there is a problem with that A-99. But, I could be wrong. Let me know what you come up with. You have my curiousity up now.
73s.
Jeff, kc0gxz. |
Scrapiron63
| | Posted on Monday, September 01, 2003 - 6:21 pm: |
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Hey ryan, good idea on getting by the wife. lol
But if he gets a new 99 or I-max 2000, its gonna show a dead short between center and shield. The maco beam won't, nor will any beams with a gamma match. The old beams with a beta match show shorted, as do most groundplanes that I know about.
scrapiron
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antennadude
| | Posted on Monday, September 01, 2003 - 6:53 pm: |
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I am in the process of custom fabing a CB antenna (GP) and would like input from everyone. |
Bigbob
| | Posted on Monday, September 01, 2003 - 10:57 pm: |
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The a-99 is capacitively coupled between the center conductor and antenna and a tapped coil to ground,with induction rings around coil to change it's inductance hence operating freq.It should show a dead short with a multi-meter. |
Apocolypse400
| | Posted on Tuesday, September 02, 2003 - 12:57 am: |
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Dead short. SWR meter goes all the way and the radio emits a high pitch whine. The last two symptoms lead me to the short. I was in the process of moving it, when I put it back in place it was dead.
Thanks
Steve |
Kc0gxz
| | Posted on Tuesday, September 02, 2003 - 5:23 am: |
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Apocolypse400
Put a dummy load on the end of your coax in place of your antenna and do a SWR check to make sure that the coax may not be the problem.
Shorted coax will do the same thing as you just described. Or, just do a continuty test on the coax.
If the coax is ok, then may your A-99 forever rest in peace and its spirit find its way to antenna heaven. I, and I'm sure all the rest of us here, are saddened by this event. We wish you well and may your 10-7 days be limited.
But hark! The good Angels of Copper Electronics beckons thee! Does thou not heareth them brother Apocolypse? With the blessed angels help and guidence, thou soon will be reserrected so the voice of Apocolypse can once again be heard throughout the vast heavens and universe. They calleth thee.
Varily varily I say onto you brother Apocolypse. Go upon them and they shall deliver onto thee the power and glory you seeketh.
In other words, just call Copper and they'll take care of you.
Jeff, kc0gxz. |
Bigbob
| | Posted on Tuesday, September 02, 2003 - 6:25 am: |
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Sounds to me like your antenna is to close to your mike cord,or your radio,you're feeding rf in through your mike or your power mains,if possible try another antenna at same location or just replace your current one but if you still have same problem move antenna farther away from station,this will only work if you have changed nothing else,a very high power amp can do the same. |
Bigbob
| | Posted on Thursday, September 04, 2003 - 8:04 pm: |
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To the original question,YES,buy an I-max 2000 and be happy,better than any dumb old a-99 by a long ways. |
Kc0gxz
| | Posted on Thursday, September 04, 2003 - 11:05 pm: |
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Bigbob
Amen to that.
Jeff, kc0gxz. |
Apocolypse400
| | Posted on Thursday, September 04, 2003 - 11:23 pm: |
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Thanks Guys
Since I want a Omni-Directional Antenna, I think I will order a I-MAX from Copper. Rechecked the coax, and built a dipole to check everything out. SWR is 1.3 and the system seems fine with it. I am afraid to hook the A-99 back up, think I will use it for target practice.
Steve |
ryan
| | Posted on Thursday, September 04, 2003 - 11:50 pm: |
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you'll be better off even with a dipole than an a-99. i talked to a guy 40 miles away and his HORIZONTAL dipole hit me with a harder signal than his vert a-99. i was listening vert at the time. his vertical dipole he built soon after romped |
Kc0gxz
| | Posted on Thursday, September 04, 2003 - 11:54 pm: |
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Apocolypse400
You won't be disappointed when Copper sends you your I-Max.
5/8 wavelength. Can handle 5KW. A bandpass of around 3Mhz. 24 feet in length.
What more could you ask for? Put that baby up as high as you feasibly can. You're going to love this.
Personally, I'm glad you have seen the light.
Jeff, kc0gxz. |
Slim1
| | Posted on Friday, September 05, 2003 - 12:07 am: |
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keep ahold of the center and top sections,as a
friend may need these someday! you never know?
slim cdx285 |
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