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First few minutes is impressive. Although the unit cannot be calibrated as traditional VNAs. It's ability to measure S11 and S22 to 900Mhz is impressive. I will do a more in depth review in a couple of weeks after I have had time to make and compare measurements. Former HP/Agilent engineer.
Handy little device! In the picture i tested a sort wave delta loop antenna for 7MHz. The resonance and the impedance is clearly visible at marker one. The weakest part is the navigation switch. Stuck pretty often.
I bought 3 units of this, of which 2 were damaged. One had its tilting switch ripped off, which I had to glue back, the other one had a sheared capacitor and torn solder pads on the display flexi-PCB, which I had to manually solder back and glue it with epoxy. See images below. I'm not totally satisfied, although the instrument itself works ok. I do recommend the item, but the seller needs to take more care about handling.
Very useful tool. I received the item earlier than the estimated date. Exactly, after 11 working days of shipment date. I recommend the seller without any hesitation.
Cette chose est géniale ! L'écran est un peu petit, il y a besoin d'un stylet, mais grâce au logiciel sur ordinateur, c'est beaucoup plus pratique 😉 Je trouve excellent les accessoires : 2 pigtails SMA, 1 adaptateur SMA, 1 terminaison de calibration 50 ohms, 1 terminaison court-circuit, 1 terminaison circuit ouvert. Je recommande fortement de regarder ces 2 vidéos : youtu.be / knfwIKeAnRQ youtu.be / VFypdpikygM ...ainsi que les vidéos de la chaîne IMSAI Guy Merci à Bertrand (VE2ZAZ) de la chaîne Électro-Bidouilleur, qui nous a fourni un code promo ! (BGC05918). Pour les mises à jour, voici le lien original : drive . google . com / drive / folders/ 1-JViWLBOIzaHTdwdONX2RP8S4EgWxoND Livré dans une petite boîte en plastique pratique. Objet arrivé en 9 jours !
Nice little tool, had it for some weeks and it seemed to work ok, but only on external power. Now that more and more YouTube videos show up featuring this device (especially checkout the videos from Joe Smith) I have noticed that the unit should have a lithium-battery inside, mine doesn't have any (as you can see in the picture the solder pads for the battery have never been used). Hence I cannot run it standalone. @banggood:can you make up for this, e.g. by sending me the battery please?
Transport to Hungary was 23 days with EU priority line Arrived in perfect condition. Works well. Thank you
Ordered on Jun 15 2020 from EU store received on Jul 4. All ok. Did not tested yet.
tout es arrivé conforme et rapidement, je recommande produit de bonne qualité pour le prix
An excellent little tool for Tuning Antennas and Duplexers, A pitty it has no Battery Built-In