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Reviews Categories | Antenna Analyzers | Funkamateur Vector Antenna Analyzer, FA-VA Mk III Help


Reviews Summary for Funkamateur Vector Antenna Analyzer, FA-VA Mk III
Funkamateur Vector Antenna Analyzer, FA-VA Mk III Reviews: 2 Average rating: 4.5/5 MSRP: $450
Description: VectorImpedance Analyzer, stand alone or use with a PC.
Product is in production.
More info: http://www.box73.de/product_info.php?products_id=2583
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You can write your own review of the Funkamateur Vector Antenna Analyzer, FA-VA Mk III.

DD4DA Rating: 4/5 Nov 23, 2014 12:32 Send this review to a friend
Compact and well designed  Time owned: more than 12 months
I purchaised the third revision of the FA-VA as a kit and assempbled and calibrated them in just a few hours. The kit contains the housing, lc-display unit and the grafic processor pcb, main processor unit that includes the charging balancer unit for the LI-cells (LC-18650 type from Panasonic) and the detector head. There are two different head types available - the single port and the twin-port type. The twin-port variant was availabe as a "exchangable" option. Unfortunatly you must open the device an dismount the single-port type before you replace the with the twin-port head. Since 2014 there is an update is available that singleport head could be replaced by a newer Version of the twin-port head that's makes it possible to select the Operation mode by the firmware. It's not required to reopen the device again, to exchange the messuring head. The update requires sending the device back to the resellers Support.
My experiences with the FA-VA MK-III in the last 2 years are good. I did some coax cable length messurements and tuning the builded 5 band Spiderbeam. It's pretty nice to checkup the antenna tuner.
The Bluetooth option make it possible to do messurings at the feetpoint of the antenna, without a cable link to the antenna structure. A notebook/Windows-Pad is able to control's this Instrument via the wireless link. The messuring results are available far away from the antenna.
The "SWR","magnitude and phase", "reactance and Impedanz" will displayed scalar by a line diagram. The vectored view is displayed by a Smith-Chart diagram.
The used internal mpu's are 8 bit ATMega256 and a AtMega128. One the them is used to drive the Display, Switches and control the recharge process.
The Display and the Driver board are uses a resistive touch Panel, but the Firmware does'nt suppot this - i am not wondering why. I guess the Firmware does'nt use an RTOS due lack of memory and cpu time. I am unsure if i would use two 8bit MCU's to do all the Jobs. I would prefere an ARM Cortex M3 that time to do all of the Jobs with just one mpu - but, this was not my decision. As a result, this is a very powerful tool that's not requires a Computer to use them without lacks in comfortability. It's a replacement of my MFJ Analyser and a nice addition to the scalar "FA-Network Tester". The developer OM Norbert, DL1SNG did a good Job.
If i need to decide me now (2014) i would purchaise the VNWA3 from DG8SAQ, that's running upto 1.3Ghz but requires a Notebook.
 
G3EJS Rating: 5/5 Sep 23, 2012 00:58 Send this review to a friend
Superb  Time owned: 0 to 3 months
I was looking for an analyser that would give a graphic display over a swept range of frequencies.
I have used an MFJ 259B for many years, and have built a VK5JST analyser, both of which work in a similar way, and are very valuable aids, but you need to make manual frequency changes and record readings to get a picture.

I looked at many network analysers, some looked good and were very expensive, some were not so expensive, but had tiny screens.

I saw the review of the Mk II from DG8FBV here, looked at his web site, and contacted him with some questions, He was a great help, and I subsequently bought the Mk III version.

The quality of the kit is excellent, and every part is supplied, right down to the screws and a plug for the charger socket. Absolutely everything is included.

The assembly is very easy, though I think it would be fair to say that good soldering skills are needed, and so is a fair amount of building experience. This would not be a first project, especially if you do not speak German, as all the documentation is in German. This did not hinder the building, but it is essential that you understand the testing procedure, and the calibration procedure.

The screen is large and clear, it seems to be a touch screen, though I donít see any use of that (yet :) ).

It is an absolute pleasure to use, the software is well thought out, making menu selection and value changes intuitive.

Certainly one of my best purchases, and I have no hesitation in recommending it.

Pictures at http://www.g3ejs.com/fava3.htm
 


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