Cheap SDR HF mod (PCB maze)

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AlarmedFelix
Posts: 23
Joined: Wed Feb 21, 2018 5:12 pm

Cheap SDR HF mod (PCB maze)

Post by AlarmedFelix » Wed Mar 21, 2018 6:19 pm

Hi guys i need help i want to mod cheap sdr for recieving HF (160m,80m,40m bands) BUT i hav ebig problem i dont know which traces on PCB i must solder.
there are images of pcb from both sides.
https://imgur.com/a/XJruD

EDIT: I discovered PIN1 of RTL2832U on better place now i need to know what or where is PROTECTIVE DIODE

rtlsdrblog
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Posts: 2774
Joined: Mon Nov 19, 2012 11:54 pm

Re: Cheap SDR HF mod (PCB maze)

Post by rtlsdrblog » Thu Mar 22, 2018 1:09 am

Your dongle is missing the ESD diode. Some cheap or badly manufactured ones don't come with that diode.

Also this is an E4000 dongle, so remember that if you do the HF mod you'll be disturbing normal quadrature operation.

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