Experience with USB galvanic isolators?

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brinberkeley
Posts: 1
Joined: Wed Jan 06, 2016 2:50 am

Experience with USB galvanic isolators?

Postby brinberkeley » Sat Jan 09, 2016 10:35 pm

I'm operating my SDRplay from a MacBook Pro, and find that certain ham bands are getting swamped by broadband noise when the laptop is plugged in and charging. Some googling around seems to indicate that a USB galvanic isolator can solve this, however I haven't come across any testimonials specifically for SDRplay.

It's not hard to find USB galvanic isolators for sale, but they all seem to be limited to supplying no more than 100 mA to the device side. I haven't been able to find a reference for nominal current draw for the SDRplay, but I suspect its higher.

Anyway, has anyone run into this problem (or similar computer RFI problem), and has anyone solved it with a USB galvanic isolator?

Thanks in advance!
Last edited by brinberkeley on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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Sasan
Posts: 92
Joined: Sat Jun 27, 2015 1:15 am

Re: Experience with USB galvanic isolators?

Postby Sasan » Sun Jan 10, 2016 7:36 am

I haven't used galvanic isolators, but I'm using a shielded USB cable (those with ferrite beads)
See my results here:
viewtopic.php?f=5&t=388
Last edited by Sasan on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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CaptainNemo
Posts: 114
Joined: Mon Jan 05, 2015 1:22 pm
Location: Genoa - Italy

Re: Experience with USB galvanic isolators?

Postby CaptainNemo » Wed Jan 13, 2016 6:09 pm

According to my low-price low-precision keweisi usb meter
SDRplay current draw is about
0.05 A at IFbw/SR =< 1.536 MHz
0.08 A at IFbw/SR > 1.536 MHz
bye
Last edited by CaptainNemo on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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