Question about Sony VAIO VGN-SZ491N/X Notebook

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I lost the external rubber antenna for sony VGNSZ491N. I can't find a replacement part number.

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If you are looking to replace the external WAN antenna, you want part # 1-754-426-11
More part numbers for Sony VAIO VGN-SZ491N/X: http://www.sparepartswarehouse.com/Sony,Vaio,VGN-SZ491N,MoreParts,Laptop,Parts,6.aspx

Posted on Mar 27, 2011

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Wats the best external antenna but cheap or a diy external antenna


well thats a loaded question the best amateur radio antenna for an HT.. it would be something you would put on the roof of your house, like a cushcraft 13B2 or something, thats what I have if you are lookin for gain. They are around $200 I think maybe a little more. but portable I would use the rubber duck antenna that came with it, it is resonant but no gain, but still works great, contact your local ICOM dealer. DIY external is another story and is way beyond the scope of FixYa as there are hundreds of books on antenna theory.

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I have a unit like that. The antenna appears to be dead. It just searches forever and never finds anything. I use an external antenna that I got from eBay (brand is Gilsson) and it works fine. You just plug it in the external jack (after removing the little rubber plug) and it works even better than the built-in antenna.

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Garmin 310. Bought March 2007, working perfectly until 1100 yesterd, then kept losing satellites, then coming back and so on. By 1200 lost all satellite connection. Satellite screnn shows no activity...


Please read the solution that resolved this problem for someone else. Most likely, you have already tried this.

http://www.fixya.com/support/t1115882-garmin_nuvi_360


If the above procedure does not work for you, the entire antenna assembly will need to be replaced.
The other option is to purchase an external antenna for your Nuvi and plug it into the external antenna port (gold connector) on the Nuvi antenna assembly.

Best wishes,
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Lg vx8350 Using external antenna port. Phone now refuses to switch back to internal antenna when external antenna is unplugged. No signal now without external antenna. Plug external antenna back in, full...


The Wilson adapter damaged your internal antenna. I talked to Wilson today to get a part number to buy the adapter and the told me they did not recommend using it as it has damaged a number of phones. They also said that LG might have corrected the problem in the newest production models.

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take the phone to a mobile service shop and have them replaced the antenna that is located on the phone's main-board.

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External antenna - Garmin 25MCX low profile remote GPS antenna

I have been experiencing the same problem many have been having with the Nuvi 6xx and 3xx series giving an error message “Lost satellite reception”.

My problem started mid April 2008 and got progressively worse. I would use my GPS on weekends and it would work perfectly for the first 10 – 30 minutes and then would loose satellite reception, rendering it useless.

I bought my Nuvi 660 when it first came out in October 2006 for just under $700 and is now out of the 1 year warrantee.
I called Garmin Technical Support and we checked my Software version (4.40) and more importantly my GPS SW version (3.00). According to the tech I had on the phone, the GPS SW version was more important then the Software version. It was in fact already updated to 3.00, I did master reset, after master reset, but regardless, nothing helped.

I contemplated what I should do.
Return mine and get a refurbished unit from Garmin for $225 with only a 90 day warrantee?
Buy a new Nuvi 660 for around $300
Buy a new Nuvi 2xx series with fewer features for $200 to $275.
Buy a Megellian GPS?

I read through this forum and came across one person that was told by Garmin “that they are aware of an issue with some Nuvis involving the failure of a diode in the unit that senses whether or not an external antenna is connected.” Apparently this diode failure is caused from the high heat these units experience from being left in a hot car for long periods of time. This would explain why mine would work in the beginning and then die.

So my thinking was, if the diode “thinks” there is an external antenna attached when it isn’t, what would happen if I “did” connect an external antenna?

Garmin recommends the Garmin GA 25MCX low profile remote GPS antenna for the Nuvi 660 and costs $31.49 (not sure about additional costs for tax and shipping)

So I purchased the NEW antenna from a seller on eBay for $25.90 total and IT WORK FLAWLESSLY.

Just to make sure it really was the new external antenna that was working and not the unit coming back to life, I started my 3 hour journey with the external antenna NOT connected. As usual it lost satellite reception in about 15 minutes. I plugged in the GA 25MCX and it immediately connected to the satellites and never lost them.

I repeated the same process coming home and once again, I connecting the external antenna after the unit reported loosing satellite reception, and it worked perfectly.

Conclusion: if your unit is experiencing loosing satellite reception, and is under warrantee, return it ASAP. If it’s out of warrantee, get an external antenna. There are other manufactures of external antennas and all should work as long as it has an MCX connector.

Side Note: This external antenna also worked perfectly on a friend’s Nuvi 350 with the same problem.

I wanted to share this with everyone because I’ve been racking my brain for months over this. I hope this helps.

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