I don't like to announce something before it's ready. But my hand is being forced.
So please consider this a pre-announcement. There are no guarantees.
The PCB and bill-of-materials (BOM) are finished and ready for prototype construction.
The problem is I don't know WHO is going to build this or HOW. So I don't know WHEN it might be available. And most importantly I don't know what it might COST.
If YOU have specific ideas about these questions please email me. I'm especially interested in full-service manufacturing and distribution outside of China.
KiwiSDR 2 Goals:
Minimal changes. Fastest time-to-market with lowest possible risk. BUT since the PCB is going to be re-spun fix some of the known limitations that don't add too much risk:
New RF front-end:
Balanced input via balun transformer
Digital attenuator (per the advisory group: pSemi PE4312, 0 - 31.5 dB, 0.5 dB steps)
Gas discharge tube (GDT) across input in addition to TVS diodes
Static drain resistors (100K) from input connections to ground
External ADC clock brought out on third SMA connector
Self test loopback mode using a short cable between this SMA and antenna input
New GPS chip to replace current one which is now EOL
Reverse polarity protection (via P-FET) on 5V DC input
TVS diode across 5V input
I have an email advisory group. Many, many other changes and additions were considered and deferred. They have been put onto a list for the future.
Additional info as things progress.
Thank you.
https://forum.kiwisdr.com/index.php?p=/discussion/2955/kiwisdr-2
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