ADALM-PLUTO (new DATV SDR)

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g8lce
Posts: 66
Joined: Sun Dec 06, 2015 10:26 am

Re: ADALM-PLUTO (new DATV SDR)

Post by g8lce » Sun Jun 30, 2019 11:42 am

Check the power you are feeding to the power amp. It could be upsetting the usb power. I had the usb input board of a Minitioune blow when a power supply I used was not very nice!!! Earths are not always what they seem!!!

Martin G8LCE.

radiogareth
Posts: 295
Joined: Wed Jan 06, 2016 9:46 am

Re: ADALM-PLUTO (new DATV SDR)

Post by radiogareth » Wed Jul 03, 2019 7:24 am

I find the Pluto is very sensitive to usb wobbles and earth loops. Works fine on its own, as soon as I connect other things on other PSUs I get connects/disconnects.
No solution as yet other than to use portable laptop on battery.
Gareth

g7jfi
Posts: 18
Joined: Thu Sep 29, 2016 4:31 pm

Re: ADALM-PLUTO (new DATV SDR)

Post by g7jfi » Thu Jul 11, 2019 9:47 am

Hi Gareth.
The problem has been fixed by one user.

https://www.eevblog.com/forum/rf-microw ... to-sdr/25/

Look about 2/3 down the page. You can search the page for his user name "Taucher" to take you to the relevant post.

Hope this helps. I'll be modding mine as soon as the warranty is out as I have same problem, but it is not too intrusive at the minute as I seldom disconnect the Tx port while it is in use.

Terry G7JFI

radiogareth
Posts: 295
Joined: Wed Jan 06, 2016 9:46 am

Re: ADALM-PLUTO (new DATV SDR)

Post by radiogareth » Tue Jul 23, 2019 1:36 pm

Thanks Terry. I have had a close look at that diagram. Seems all I need to do is bridge the ground side of the bifilar choke to achieve the same thing. Diagram isn't wonderfully clear but adding what would be several cms of wire surely isn't 'good RF practice'? Seat of pants feeling here.....
I'll try it on one of mine and see if it behaves any better.
Gareth

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