Maybe you know the "SG2100 Positioner Heart Surgery" modification by jerryt, for applying external power to a circuit board of a SG2100 motor.
See here: SG2100 Positioner Heart Surgery , and the .ppt can be found here: Digipower SG2100 DMSI SUPPORT
The modification is especially usefull, when your satellite receiver (or satellite PC card) can not supply enough power for LNB and motor.
This above modification uses the external power for only the motor relay contacts, which also allows using higher voltages than 19 Volt for the motor. The modification needs three cuts, and some soldering of jumper wires.
I found another modification for applying external power for this SG2100 circuit board, which consists of just two cuts in the copper lanes of the circuit board, and the addition of just one extra wire (jumper wire) or diode on the circuit board. So I think the modification is somewhat easier.
With this modification the external power goes to the relay contacts, the relay coils (including extinction diodes), and the two transistors feeding the relay coils. Because of this, I suggest to use an external voltage of not higher than 19 Volt.
The modification is shown and described in the attached .pdf file.
Note that with this modification, you can choose to use a protective diode or not.
Also you can choose to find a way to lead the external power wires outside of the motor housing, or to use one of the F-connectors for that. In the latter case, the cable to the LNB cannot be connected to the motor anymore, so the LNB path must be "split off" from the receiver cable, using a splitter with power-pass both ports, both directions.
However, such a splitter is not always easy to find (many splitters have diodes, but in the wrong way for this application!). Suitable types wthout diodes are for instance: Spaun VBE 2 P (so NOT the VBE 2 PD!), or Kathrein EBC 110.
Also splitters with "reverse power pass" can be found on the internet; they would also do the job. But the internal diodes in them are quite unnecessary.
These might also be good (not checked!): Dynaflex S-222 or Dynaflex S-202.
I myself use a König FC-2SPLT-KN for splitting a motor path and an LNB path, but it is specified 5-1000 MHz (I have no troubles at all with it, though).
I hope this modification can be usefull for someone!
Greetz,
A33
See here: SG2100 Positioner Heart Surgery , and the .ppt can be found here: Digipower SG2100 DMSI SUPPORT
The modification is especially usefull, when your satellite receiver (or satellite PC card) can not supply enough power for LNB and motor.
This above modification uses the external power for only the motor relay contacts, which also allows using higher voltages than 19 Volt for the motor. The modification needs three cuts, and some soldering of jumper wires.
I found another modification for applying external power for this SG2100 circuit board, which consists of just two cuts in the copper lanes of the circuit board, and the addition of just one extra wire (jumper wire) or diode on the circuit board. So I think the modification is somewhat easier.
With this modification the external power goes to the relay contacts, the relay coils (including extinction diodes), and the two transistors feeding the relay coils. Because of this, I suggest to use an external voltage of not higher than 19 Volt.
The modification is shown and described in the attached .pdf file.
Note that with this modification, you can choose to use a protective diode or not.
Also you can choose to find a way to lead the external power wires outside of the motor housing, or to use one of the F-connectors for that. In the latter case, the cable to the LNB cannot be connected to the motor anymore, so the LNB path must be "split off" from the receiver cable, using a splitter with power-pass both ports, both directions.
However, such a splitter is not always easy to find (many splitters have diodes, but in the wrong way for this application!). Suitable types wthout diodes are for instance: Spaun VBE 2 P (so NOT the VBE 2 PD!), or Kathrein EBC 110.
Also splitters with "reverse power pass" can be found on the internet; they would also do the job. But the internal diodes in them are quite unnecessary.
These might also be good (not checked!): Dynaflex S-222 or Dynaflex S-202.
I myself use a König FC-2SPLT-KN for splitting a motor path and an LNB path, but it is specified 5-1000 MHz (I have no troubles at all with it, though).
I hope this modification can be usefull for someone!
Greetz,
A33
