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
Solder Jumpers ?
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Re: Solder Jumpers ?
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
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
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- Joined: 20 Jan 2022, 05:43
Re: Solder Jumpers ?
I order PCBs on JLCPCB from gerbers published here. They comes without any jampers preinstall. I found on ibom jampers on JP7, JP1,JP4.
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- Posts: 83
- Joined: 30 Dec 2021, 20:22
Re: Solder Jumpers ?
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
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Re: Solder Jumpers ?
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
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