USB ports and sdr....

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USB ports and sdr....

Post by Oshkosh2020 » Mon Jan 13, 2020 1:01 am

Good Evening,
Quick piece of advice please ?..

Have been using various SDR Dongles with my laptop and notice that the connection via the usb port and dongle is quite fragile even though the device is pushed firmly into the usb port.
Sometimes the coax for the antenna can twist slightly putting undue pressure on the sdr dongle and the usb port.
Was wondering if a small fly lead/extension for the usb port is ok to use ? Will any lead work or does it have to be a certain spec ?
Many thanks
Oshkosh 2020

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Joined: Fri Jan 03, 2020 3:59 pm

Re: USB ports and sdr....

Post by Bernie76 » Mon Jan 13, 2020 7:21 pm

Hi Oshkosh,

I use an USB extension cable for that exact reason.
This alleviates any mechanical stress on the USB port.

Kind Regards,


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Joined: Wed Apr 25, 2018 8:14 am

Re: USB ports and sdr....

Post by aurgathor » Tue Jan 14, 2020 5:01 am

Some SDR dongles can use around 300 - 350 mA, so you want cables with reasonable PWR and GND conductors for the length of the cable.

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Joined: Sun Oct 09, 2016 7:27 am

Re: USB ports and sdr....

Post by Username » Tue Jan 14, 2020 10:00 pm

I use some hight quality Delock USB3.0 Cablee without any problems.

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Joined: Sat Jan 14, 2017 11:07 pm

Re: USB ports and sdr....

Post by hotpaw2 » Tue Jan 14, 2020 11:39 pm

I use a short high quality USB extension cable on which I clamp a ferrite bead or even use a few turns thru a ferrite toroid. This not only reduces stress on the USB connectors, but potentially also reduces the chances of computer RF noise traveling on the USB cable to the SDR.

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