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Old 10-22-2003, 08:13 AM   #1
SRFast
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Default Another Antenna Question - 1st vs. 2nd GEN

I would like input from the "Sirius Gods" regarding my Sirius antenna dilema. Note: my antenna is mounted on the rear parcel shelf. I am seeking your opinion/input on the pros/cons of the two different antennas, all things being equal.

1st Gen - BMW Sirius Antenna:
High profile and pretty big foot print. Has two (2) antenna leads. Requires an ALC to connect to Sirius receiver.

2nd Gen -Kenwood (Terk SIR3) H2A car kit antenna:
Low profile and smaller foot print. Single antenna lead and connected to the ALC via a Terk SIR-SP splitter.

After switching to the 2nd gen antenna, the system has been less sensitive and I am experiencing drop outs in areas the 1st gen antenna performed well. Both antennas perform well on the highway, so I am assuming the SAT performance is OK. I live in NYC and want to ensure I take full advantage of the repeater signal. I suspect the 2nd gen antenna is less sensitive to the repeater signal than the 1st gen. Any opinions? Has anyone else expereinced performance differences between the two?

Any input/comments is appreciated. TIA....JL
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Old 10-22-2003, 10:15 AM   #2
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I personally think the bigger the antenna the better the reception. Though honestly my experience does not match yours. But I can't really compare apples to apples with your situation. I had a Kenwood HU setup with the Kenwood 901 tuner and the old terk 1st gen antenna and my reception was good. Then I got the Kenwood H2A with the 2nd generation antenna. I found the reception was a tad bit better with it.

Its been said that newer 2nd generation antennas with older 1st generation tuners will see no benefit whatsoever. Apparently the newer tuners have some sort of circuitry that sends more power to the antenna for a tad bit better reception. I think this is the first time I've heard the reception was actually worse with the new antenna when hooked to a first generation tuner. Its interesting and I am looking foward to reading other feedback that you get in this thread on the subject.

Who said size doesn't matter. LOL
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Old 10-22-2003, 10:36 AM   #3
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I am really suprised; my second gen terk sir3 works much better than my original terk. My drops are like one a week instead of one a day. I would check to see if you have any kinks in your line. Do you also have the second gen 902 tuner?
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Old 10-22-2003, 10:54 AM   #4
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It could be the older Antenna is designed to match your tuner more closely than the SIR3. In order to get the best performance in a radio, the input stage must carefully match the impedence of the antenna. I don't think the SIR3 has any added benefit when matched with a Gen1 tuner so you are probably better off with the old design.

The biggest problem with your setup is where you have mounted the antenna. If you can mount it outside the car you will be more satisfied with the performance with either antenna.
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Old 10-22-2003, 11:02 AM   #5
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Quote:
Originally Posted by manco_lives
The biggest problem with your setup is where you have mounted the antenna. If you can mount it outside the car you will be more satisfied with the performance with either antenna.
I didn't even catch that in his message, but I agree with Manco on this one. I know folks put these antennas inside because they don't want that ugly unsightly antenna on their roof, but these type drop-outs are the price you pay. However, if the 1st generation does better and the drop-outs are acceptable, then leave it where it is.
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Old 10-22-2003, 12:30 PM   #6
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Question on the new Antenna - it only has one connection for Satellite. Will it still work with a ground based transmitter, say in NYC? Or do I have to get another Antenna?

Mark
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Old 10-22-2003, 12:31 PM   #7
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Remove the ALC and see what happens.

Is the antenna mounted inside the car? I think you know my thoughts on this.

Jeff
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Old 10-22-2003, 01:34 PM   #8
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First thing that I would do is remeove the ALC box. If that does not help I would move the antenna on the roof where it is supposed to be. I honestly can not tell that much difference in reception from the old Terk "turd" antennas and the SIR3.
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Old 10-22-2003, 02:46 PM   #9
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Thank you all for your responses. I might go back to the BMW antenna.

Regards....JL
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Old 10-22-2003, 03:01 PM   #10
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Quote:
Originally Posted by SRFast
Thank you all for your responses. I might go back to the BMW antenna.

Regards....JL
JL, what does the BMW antenna look like? Will this work with one of the PnPs?

Mark
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Old 10-22-2003, 03:16 PM   #11
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The BMW antennas that I've seen look like the Terk "turd" antennas.
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Old 10-22-2003, 07:33 PM   #12
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The BMW antenna is the same one used on most 1st gen receivers - a PC mouse on steriods. That is why I refuse to mount it on my car's roof. Here's a picture:



Regards...JL
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Old 10-22-2003, 08:10 PM   #13
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Yep that is what we call the Terk Turd!
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