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BT-821
Ducati
I was just checking to see if anyone has any experience with this receiver. I believe I'm going to purchase a bluetooth receiver to free up one usb port for 3G tethering. It's been a number of years since I've had a bluetooth one.

http://www.usglobalsat.com/p-43-bt-821-mtk.aspx

http://www.usglobalsat.com/product_specs/BLUETOOTH/bt821_specs.html

A few things I noticed with this unit is 23 hrs of continuous use from a single charge and that most show spec accuracy @ 10meters. This unit has "MTK Chipset" and accuracy @ 5meters. I'd like to get one of the more accurate bluetooth receivers if I could, the Deluo Navstick seems to go off course a little too often for me.
tcassidy
I have 3 Bluetooth receivers; a Garmin GPS10x (SSIII), iTrek M7 (MTK) and GPSlim 236 (SSIII). Informally, I think the iTrek is a little faster at acquisition than the GPSlim, however, once working, I don't see any difference.

The first thing you need is - stating the obvious - internal Bluetooth on your laptop. And if you have that already, why aren't you tethering your phone by Bluetooth? It is surprising, if your laptop is of the vintage with internal Bluetooth, that it only has one USB port.

If you consider a USB hub to provide more ports, make sure it is unpowered. And test it to ensure it will drive your GPS and phone connection.

Terry
Ducati
The x31 Thinkpad has internal bluetooth and two USB ports, however, one of them is on the side and the other is behind the screen.

The port on the side would be difficult to use since it rests right up against the instrument cluster.

If I tether via bluetooth 3G looses connection speed as USB does not, also USB charges while tethered.


I'm trying to find something like this? :

(I'm trying to confirm it has 2 unpowered and 2 powered)
Attached Images
laptop.jpg   belkin.jpg  
tcassidy
USB cannot have powered ports without a separate power supply. All unpowered means is all the ports share the power provided by one USB port from the computer. Running a GPS would not be a problem but combining that with charging a phone might be an issue. I'd certainly look at a Bluetooth GPS receiver. I am partial to the iTrek M7.

Terry
Ducati
Quote:
Originally Posted by tcassidy
USB cannot have powered ports without a separate power supply. All unpowered means is all the ports share the power provided by one USB port from the computer. Running a GPS would not be a problem but combining that with charging a phone might be an issue. I'd certainly look at a Bluetooth GPS receiver. I am partial to the iTrek M7.

Terry

Some of the reviews I've read around the internet the iTrek M7 rates very well, the thing I like too about the MTK chipset is its very low power draw. I see all the bluetooth units that have that chipset have very long run time some are rated 20 hrs+. It's nice to get some first hand opinion, thanks!!

With regards to tethering...

This is connection tests results:

Sony Ericsson TM506 via USB




Sony Ericsson TM506 via Bluetooth




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