AW07A SWR HF VHF UHF Antenna Impedance Analyzer 1.5-490Mhz

So far so good, I have tried it on an external battery but want to get a PSU to run it

Good batteries or an external PSU of 12V or less are essential for this device to work properly. If batteries are low it comes up with frequency error on VHF/UHF. Though in this case HF still appears to work normally, I am not to sure you can trust the readings with low batteries though. It seems to be impossible to get an exact frequency on the display. but I have not found this to be a real problem, as I am looking for a good match in general across the whole Band, not just a specific frequency. It does what I wanted it to do and saves a lot of messing around without the use of this device. Especially for my home made antennas. Glad I bought it at a much more realistic price through Amazon than a well known American brand seem to be charging for what appears to be the same device with their branding on it.

Did not work, had to be sent back

Hmmm... Switched on with batteries and it was dead. I found that there was no battery PD and the battery holders had been wired up completely incorrectly with one of the connecting wires from a holder being snipped completely short . The battery holders had obviously been put together badly as well. Even a school boy could have got this wiring right - so much for QA!! Luckily, this had happened in such a way as not to damage anything - I hope. Replacement holders have been ordered from elsewhere. Stupid me for assuming it would be wired up correctly.... Using an external supply, the device powered up OK but it has not yet been used in anger as it was a Christmas present to self. I am also suspicious of the connection of the main RF connector to its PCB and indeed all that PCB too...looks a tad dry. One simple question for Messrs Future Tech: Why should I need to be worried about these sorts of problems in a device that costs this amount of money??

still testing here but for the price seems reasonable

Nice looking reasonably well made piece of test gear but it ends there. I was using it to find the resonant frequency of 8 coils I completed 6 then that was it the read out became Mumbo jumbo. Full marks however for Amazon they refunded IMMEDIATELY, well done !!

came quick.very nice i must say.all ok.recommend yes.5-stars.many thanks

Works fine, this also DRINKS alkaline battery's and a good set is needed or the readings can be misleading. Tracked package so I was able to follow its progress in coming to the UK via its full route. Not sure what firmware this unit has also when you first turn it on the back-light said its on when its not, so its a different procedure to turn the back-light on. No instructions but their easy to find on-line however with the different firmware versions I don't know if I have the correct user manual. For the price, features and being cheaper than a well known 3 letter version this is a good buy.

製品の改善がされたのでしょうか？（個体差か？） バーニアのガタは無く、VR取付けのガタが有りますが、使用上は全く問題ありません。 7MHzの自作逆V、18MHzや50MHzの八木、430MHzのヘンテナ等の確認をしましたが、 性能的にもアマチュアには十分だと思います。 電源は使わなくなったルーターのACアダプター（12V 1.5A) を流用しました。 取説はPDFをダウンロードしたものを、Web翻訳で日本語化しました。

bonne appareil , a la hauteur de certain autre plus chère et qui font la même chose, seul bémol l'emballage a renforcer pour de l'électronique

This analyzer is perfect for fast checking of Ham antenna. HF, VHF and UHF. With this analyzer you will be able to sweep the band and make sure the VSWR is appropriate across it. I primarily bought it for the VHF and the UHF capability to test mobile installations. Within minutes I was able to find a bad connection on the antenna and correct the situation. The precision of the VSWR measurement is one (1) decimal so you can't really accurately characterize the antenna nor draw a plot of VSWR vs frequency. It is not mean for that. It is mean for field and speed. The stability of the frequency reading decreases with the frequency. Usually, the accuracy of an oscillator is specified in Part per million or PPM. So the frequency stability is worst in UHF. To give you a feel here is the stability of the instrument, S=stable, U= unstable 1) HF = SSS.SSS 2) VHF = SSS.SSU 3) UHF = SSS.SUU For me this works for the intended purpose.

Hallo ich habe schon ein MFJ 207 Bj. ca. 1985 das schwingt nicht mehr sauber ein. Nach dem mich der SARK 100 ziemlich entäuscht hat, kam ich auf der Suche im Netz auf den MFJ 266, aber der Preis ist ja viel zu hoch. Dann bekam ich einen Tip der mich zum RA-07A führte. Lange überlegt und dann bestellt. Gestern kam er an. Ausgepackt - Batterien rein - mal SWR von der Diamond BB6W gemessen. Ok alles klar. Stimmt. Bei der Baby Loop gibt es Probleme mit der Anzeige - nehme an die hohe Güte bringt das System ins trudeln, das kann der SARK besser. Falls jemand hier eine Änderung zeigt, kann er mir mal schreiben. <> SWR Comet Tuner 1:1.5 Sark 1:1.46 und RA so zwischen1:0 und 9:9. Was mir noch negaativ auffiel ist diese Stromversorgungs Buchse die nichts für ältere (zitter) ist. Peng Kurzschluss. Nein sonst habe ich nicht zu meckern übrigens gibt es eine Anleitung hier : [.....]

Todo pefecto. El aparato funciona bien, pero he comprobado que mide algo más de roe respecto a otros medidores, pero nada importante.