- AUTEK VA1 FOR SALE HOW TO
- AUTEK VA1 FOR SALE GENERATOR
- AUTEK VA1 FOR SALE MANUAL
- AUTEK VA1 FOR SALE PLUS
Additionally, these analyzers require calibration before use to take into account parameters of diodes. The sign of reactance cannot be detected with analyzers from this group. According to the RadCom, this analyzer is based on AA-908. HF analyzer (up to 30 MHz) with DDS and text-only LCD. VHF analyzer with PLL-based synthesizer and graphical LCD. Additionally, needle indicators are placed on the front panel.ĭDS-based HF analyzer with text-only LCD.
AUTEK VA1 FOR SALE PLUS
LC-oscillator plus frequency counter which displays data on the LCD. Most junky and (at the same time) very popular devices. This analyzer was manufactured as a “do-it-yourself” kit and is quite popular. To tune to the working frequency, a variable capacitor is used. Some analyzers have automatic gain control circuit to maintain stable RF signal. By using diode detectors and analog-to-digital converters built into the microcontroller, DC voltage is measured in several points. RADIO – In the “Good Old Days” - Reference to 2AQ Taihape.The RF signal from LC oscillator or DDS is amplified and fed through the resistor (fig.The Pioneering Otago Radio Stations on 28th March'21.Introduction To FM DXing on 15th August'21.Wellington Branch History on 8th October'21.NZ AM & FM Station Lists on 8th October'21.Register Of Life Members on 14th October'21.You must be a member of the New Zealand Radio DX League to access this SDR.
AUTEK VA1 FOR SALE HOW TO
AUTEK VA1 FOR SALE MANUAL
The analyser is capable of many more technical functions, such as checking baluns and while it comes with a comprehensive manual I will have to spend some time refreshing my knowledge of antenna theory if I want to get the best out of it. I have since modified the antenna to overcome this and it now works much better. A check of the impedance of the antenna on the LCD readout showed that it was very low, from the radios point of view, at 700kHz it was almost looking at a short circuit on the antenna As an example I have used an active antenna on mw for many years, always knowing that on the lower end of the mw band its performance dropped off noticeably. Correctly matching an antenna and a feeder line such as coax to a radio can result in an increase in signal strength and a reduction in man made noise. You can then use the device to measure a wide range of antenna characteristics including: capacitance, inductance and impedance. One connects the VA1 to an antenna and selects the frequency of reception on the LCD readout.
AUTEK VA1 FOR SALE GENERATOR
The Autek VA1 is basically a small, variable frequency signal generator attached to a very smart processor of some kind. About the best I have seen Dxers do was wind baluns to match antennas to coax lines, and a few took some convincing of the benefits of that.
In the old days and probably still today, Hams used devices such as grid dip meters, power meters and swr meters to test and adjust antennas to best match their transmitters to their antennas. However if you are interested in the technical side of Dxing and antennas in particular, receiving this little box is just about as good as a new radio.įor the non-technical here is a brief explanation of what this antenna analyser is and does. A quick check of the Autek web site on my return home showed they manufacture an analyser that covered from MW through SW.Īvailability was either through Autek in the States at around $NZ300 or via their Australian agent, at $NZ400, mine arrived in five days from Florida by insured airmail. There’s an old saying that you have to be mad to be a Dxer and paying $300 for a cigarette packet sized box with a few switches confirms that in my case. By chance Jim Searle from Dunedin visited an Oamaru Branch meeting at Waianakarua and had with him an Autek antenna analyser that was designed primarily for the ham bands. Early this year I emailed MJF Enterprises to inquire if they made an antenna analyser that operated at MW frequencies, the answer was no.
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