RTL Dongle Mod Thread

Vipersan

Emmett Browns Ghost
Joined
Jun 29, 2009
Messages
10,918
Reaction score
6,663
Points
113
Age
66
My Satellite Setup
IP9000HD +
TD110 Dish and TD88 Dish in Tandem
66°East to 60°West.
AZbox PrmHD + OpnbxS9HD + Skybox + DrHD F15
2x VboxII AZ-EL
2 m+ Alcoa PF + BSC421 C-Band lnbf...
+SS2/TwHnS2-3200 pci/TBS6925 pci
1.5 Fortec Star -Gbox - HtoH Ku/Ka/C
My Location
UK
So ...today is a no playing out day ..on account it is raining AGAIN !!!
So ..time to turn my attention to the NooElec dongles I obtained some time back ..Chipset in these is RTL2832U & R820T ..
They are made for NooElec ..it is their brand name printed on the PCBs ..
But ..they are rather basic and as such Crying out for some modding..
This thread I hope will bring together links to various mods already out there on t'interweb ...and any new ones you might dream up.
First job is to change that Gawdawful MCX type plug doohicky which fits sod all but the supplied twig stubby antenna ..
To that end we first have to remove the connector from the pcb ..and replace with a pcb mount SMA ..
In this case ...female..
Oh how lucky the footprint is identical ..but a hole then has to be cut in the dongle case to allow side access to the SMA ..
When it comes to removing the old MCX ...ChipQuik low melting point solder is yer best friend ..
The Photo explains all ..
rgds
VS ..
Next up is the Bias Tee mod which will hopefully allow it to ghost power an LNA4ALL or similar..
DSCF0009.JPG If I can locate a suitable inductor..
 
Last edited:

Vipersan

Emmett Browns Ghost
Joined
Jun 29, 2009
Messages
10,918
Reaction score
6,663
Points
113
Age
66
My Satellite Setup
IP9000HD +
TD110 Dish and TD88 Dish in Tandem
66°East to 60°West.
AZbox PrmHD + OpnbxS9HD + Skybox + DrHD F15
2x VboxII AZ-EL
2 m+ Alcoa PF + BSC421 C-Band lnbf...
+SS2/TwHnS2-3200 pci/TBS6925 pci
1.5 Fortec Star -Gbox - HtoH Ku/Ka/C
My Location
UK
DSCF0009.JPG DSCF0010.JPG
So ..a start has been made on getting one of these dongles to power an LNA..
No caps fitted as yet ..
but ..the protection diode on the dongle input has been removed ...allowing ghost power to reach the LNA..
The remore control receiver was laso removed ..as this was occupying useful space and surplus to requirements..
Currently I have a 10 ohm resistor feeding a small slide switch ..the output of which is connected to the sma connector centre pin ..via a 10 uH inductor..
a small capacitor dc blocking the voltage from reaching the chip input ..
The slide switch means I can chose to power an LNA or switch it off ..
currently 3.17 volts reaches the LNA ...but this -may- not be adequate ..and if not ..I will have to move the supply side of the 10 ohm resistor diectly onto the USB 5 volt line ..
Hope the photos show sufficient detail ..
rgds
VS
 
Last edited:

Vipersan

Emmett Browns Ghost
Joined
Jun 29, 2009
Messages
10,918
Reaction score
6,663
Points
113
Age
66
My Satellite Setup
IP9000HD +
TD110 Dish and TD88 Dish in Tandem
66°East to 60°West.
AZbox PrmHD + OpnbxS9HD + Skybox + DrHD F15
2x VboxII AZ-EL
2 m+ Alcoa PF + BSC421 C-Band lnbf...
+SS2/TwHnS2-3200 pci/TBS6925 pci
1.5 Fortec Star -Gbox - HtoH Ku/Ka/C
My Location
UK
So ..first test with no caps fitted as yet ..
Just FM radio ..
LNA off LNA on ...(slide swich) ...
obviously strong enough to 'bleed' through ...but I guess it proves it is working to some extent..
;)LNA OFF.jpg LNA ON.jpg
 
Last edited:
Top