Does anyone have one of those cheap vector network analyzers available on ebay?
jpsmith123, Sat Aug 10 2019, 10:53PMI see these things for sale and I'm wondering: Do they actually work?
Re: Does anyone have one of those cheap vector network analyzers available on ebay?
Sulaiman, Sat Aug 10 2019, 11:59PM
I do not know, but I see no reason why it would not work.
I use two of the cmos version of the Si570 in my diy ham transceiver for the separate Tx and Rx clocks, 10 - 160 MHz,
the more expensive non-cmos versions operate to 1.4 GHz.
The Si570 works really well.
The frequency response shown in the advertisment is very non-flat, which may be compensated for,
the performance will I expect be largely determined by the filter(s) used.
So it should work, but not as well as a 'proper' VNA.
Sulaiman, Sat Aug 10 2019, 11:59PM
I do not know, but I see no reason why it would not work.
I use two of the cmos version of the Si570 in my diy ham transceiver for the separate Tx and Rx clocks, 10 - 160 MHz,
the more expensive non-cmos versions operate to 1.4 GHz.
The Si570 works really well.
The frequency response shown in the advertisment is very non-flat, which may be compensated for,
the performance will I expect be largely determined by the filter(s) used.
So it should work, but not as well as a 'proper' VNA.
Re: Does anyone have one of those cheap vector network analyzers available on ebay?
jpsmith123, Sun Aug 11 2019, 01:14AM
I found a video about it here:
jpsmith123, Sun Aug 11 2019, 01:14AM
I found a video about it here:
Re: Does anyone have one of those cheap vector network analyzers available on ebay?
2Spoons, Sun Aug 11 2019, 08:48PM
I have the next step up, the 'miniVNA tiny'. Same idea (but more expensive ~$400), but needs a PC or phone for display. Works just fine. I also have a 'miniVNA Pro'. Between them I can cover 10kHz to 3GHz.
2Spoons, Sun Aug 11 2019, 08:48PM
I have the next step up, the 'miniVNA tiny'. Same idea (but more expensive ~$400), but needs a PC or phone for display. Works just fine. I also have a 'miniVNA Pro'. Between them I can cover 10kHz to 3GHz.
Re: Does anyone have one of those cheap vector network analyzers available on ebay?
jpsmith123, Thu Aug 15 2019, 11:18PM
After looking into it, I think I'd like to have the same ones you have. But I have to wait a little while until I pay off the lathe I just got.
From what I see, there is a "mini VNA Pro" with a lower freq. limit of 100 kHz, and a newer "mini VNA Pro 2" with a lower freq. limit of 10 kHz; so do you have the newer model?
jpsmith123, Thu Aug 15 2019, 11:18PM
After looking into it, I think I'd like to have the same ones you have. But I have to wait a little while until I pay off the lathe I just got.
From what I see, there is a "mini VNA Pro" with a lower freq. limit of 100 kHz, and a newer "mini VNA Pro 2" with a lower freq. limit of 10 kHz; so do you have the newer model?
2Spoons wrote ...
I have the next step up, the 'miniVNA tiny'. Same idea (but more expensive ~$400), but needs a PC or phone for display. Works just fine. I also have a 'miniVNA Pro'. Between them I can cover 10kHz to 3GHz.
I have the next step up, the 'miniVNA tiny'. Same idea (but more expensive ~$400), but needs a PC or phone for display. Works just fine. I also have a 'miniVNA Pro'. Between them I can cover 10kHz to 3GHz.
Re: Does anyone have one of those cheap vector network analyzers available on ebay?
2Spoons, Fri Aug 16 2019, 02:41AM
Yes I have the 'Pro 2' that goes to 10kHz. I got it for tuning up an NFC antenna for a client (@13.56MHz). The 'tiny' I bought for another prospective job to do a 900MHz antenna (which didn't eventuate so I've never used the 'tiny')
Be warned: the Chinese knock offs I got don't accept firmware upgrades. They do work though. And they are considerably cheaper - an important consideration if you are only gong to use it occasionally.
2Spoons, Fri Aug 16 2019, 02:41AM
Yes I have the 'Pro 2' that goes to 10kHz. I got it for tuning up an NFC antenna for a client (@13.56MHz). The 'tiny' I bought for another prospective job to do a 900MHz antenna (which didn't eventuate so I've never used the 'tiny')
Be warned: the Chinese knock offs I got don't accept firmware upgrades. They do work though. And they are considerably cheaper - an important consideration if you are only gong to use it occasionally.
Re: Does anyone have one of those cheap vector network analyzers available on ebay?
Patrick, Tue Aug 20 2019, 01:51AM
theres this one :
which i have, though not used it for oscilloscope probe verification yet.
Patrick, Tue Aug 20 2019, 01:51AM
theres this one :
which i have, though not used it for oscilloscope probe verification yet.
Print this page