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| Warning about NanoVNA clones and comparison with Siglent VNA |
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| Mechatrommer:
I thought you stated you mod your siglent to 3ghz version. Why dont plot to 3ghz? |
| The Bootloader:
--- Quote from: Mechatrommer on January 09, 2023, 07:25:33 am ---I thought you stated you mod your siglent to 3ghz version. Why dont plot to 3ghz? --- End quote --- I was hoping no one would notice :-DD Because I mistakenly assumed the NanoVNA was only good up to 1GHz. Oops :-// I realize the SAA2 is actually rated until 3GHz, so you are right, I could have plotted it until 3GHz. The main objective of this video was to show the issues with the NanoVNA clones, not do a metrology-grade comparison. I think we can clearly see that at least until 1.5GHz, the genuine NanoVNA compares favorably with the Siglent VNA, and the clone NanoVNA is terrible. So, mission accomplished I guess? |
| The Bootloader:
Alright, more goodies for you! Is the bad performance of the clone NanoVNA caused by the lack of shielding? Well we are going to find out, and you are going to learn how I make custom RF shields too! Spoiler alert, data/plot attached. |
| Geoff-AU:
--- Quote from: The Bootloader on January 09, 2023, 08:27:49 am ---The main objective of this video was to show the issues with the NanoVNA clones, not do a metrology-grade comparison. I think we can clearly see that at least until 1.5GHz, the genuine NanoVNA compares favorably with the Siglent VNA, and the clone NanoVNA is terrible. So, mission accomplished I guess? --- End quote --- Yeah. This is news to a lot of people so I'm glad you have the energy to demonstrate it. Clones are hot garbage, buying most electronics via ebay/amazon is hot garbage. RTL-SDRs should only be purchased from the rtl-sdr.com blog official sources and so on. The official NanoVNA v2 (whichever one goes up to 4GHz) is bloody AMAZING for the price. The isolation degrades at high frequencies >2GHz but gee.. it's so cheap and so good you can use it for a lot of stuff. Even though your dynamic range at the top end isn't great, it's still giving you GOOD data rather than lies so you can rely on it for what it can tell you. --- Quote from: The Bootloader on January 09, 2023, 08:29:32 am ---Is the bad performance of the clone NanoVNA caused by the lack of shielding? --- End quote --- It's caused by karma. If you buy a clone, you get what you deserve ;D |
| Mechatrommer:
--- Quote from: The Bootloader on January 09, 2023, 08:27:49 am --- --- Quote from: Mechatrommer on January 09, 2023, 07:25:33 am ---I thought you stated you mod your siglent to 3ghz version. Why dont plot to 3ghz? --- End quote --- I was hoping no one would notice :-DD Because I mistakenly assumed the NanoVNA was only good up to 1GHz. Oops :-// I realize the SAA2 is actually rated until 3GHz, so you are right, I could have plotted it until 3GHz. --- End quote --- and then i got it backward, i thought you plotted up to 1.5GHz for siglent and 3GHz for SAA2, its actually the other way around when i look at it back here at home. btw what surprised me from your report, is how come cloned Nano becomes a joke past 400MHz albeit using same components/BOM? and probably same OSHW gerber file. |
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