(tr)uSDX Forum

Hello,
I have completed assembly.
My question is the solder jumpers, I don't find clear information on them?
Which ones to jump, if any. Just asking before moving forward.
Thanks;
Chuck

Good question....
The Jumpers are Pre-Set by PCB Trace.
By default, you do not need to jumper anything.
JP7 can switch between 5V or 12V Power Supply for the OpAmp, in case you use a 12V Type.
But by default it is set to 5V, as we´re using 5V OpAMp (LT6231).
Beware, that if you would like to change this, you´d need to scratch the 5V Bridge, before jumpering to 12V. Look at the Schematic, there you´ll see how they are connected.

JP1-JP6 could be used to add more NAND Gates to increase PA Drive Power. That´s for future experiments with different FETs. 3x BS170 work perfect with the default Setting.

73 Manuel; DL2MAN

I order PCBs on JLCPCB from gerbers published here. They comes without any jampers preinstall. I found on ibom jampers on JP7, JP1,JP4.

Vegaukr wrote: ↑28 Jan 2022, 05:21 I order PCBs on JLCPCB from gerbers published here. They comes without any jampers preinstall. I found on ibom jampers on JP7, JP1,JP4.

There is nothing to do, default situation is covered. There is pcb track etched already between the jumpers, you have nothing extra to do regarding jumpers.

Ian MM0GYX

Vegaukr wrote: ↑28 Jan 2022, 05:21 I order PCBs on JLCPCB from gerbers published here. They comes without any jampers preinstall. I found on ibom jampers on JP7, JP1,JP4.

Please ignore the jumpers completely. There´s nothing to do with them.
Everything is fine just the way you get the PCB´s from factory.

73 Manuel; DL2MAN