U Autek Research QF-1 $ SOLD Audio Filter This Autek Research QF-1 audio filter features: Peak, Notch and Low Pass. Input is via a hard wired ¼. Autek Research, PO Box , Wesley Chapel, FL USA. () RF1 RF ANALYST. The pocket-sized RF1 is designed. Hi, I have for sale one used Autek Research model RF-1 antenna analyser. It works well and is great for analysing antennas in the field.

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This graph captures the impedance results, as well as the SWR. I cleaned and resoldered these 5 joints and reassembled the unit and it works, just like it did for the first 3 weeks, more than 10 years ago. I measured another cable with a 10 percent velocity factor error. The SWR trace is shown in yellow, and its values are labeled on the right. So, we can put the measured values of Z and R in the equation 15 and solve for X.

The SWR autke slightly drop under 2. We won’t have arbitrary control over our complex impedance values, but we can at least generate values that we have some confidence in.

Autek RF1 RF Analyst

Dan has made a number of other contributions in the area of transmission line analysis. This would yield an output of about mv. In particular, a coax line should be screwed into the connector, not tested with leads. Remember, SWR is only 1: For that reason, I tend to think of auetk analyzer as not reporting the sign of the reactance, but zutek you are willing to use the Data Screen, and be careful under 8 degrees, the unit does report indeed the sign.


Autek Research QF-1, Autek Research QF-1A, Autek Research RF-1

The next lesson was to use new batteries, or better yet, a beefy power supply with plenty of voltage and current. At some frequency, this length of coax will be an electrical half wavelength. In all other data displays, the reactance or phase angle is always shown as an unsigned number. If you have any questions, autdk, or suggestions about Reviews, please email your Reviews Manager. This document has been created from materials supplied with purchase. In order to use it as a signal generator, aktek must set the width to 0, so that the unit emits a constant signal. Classifieds Detail

Here are the three antenna analyzers ajtek I owned and tested at the time of the creation of this web page. Perhaps the simplest test is to use the analyzer as an RF resistance meter. You can only depend on equation 16 when: This ratio should be between 0.

Depending upon what you are trying to measure, several computations must be performed to arrive at the result.


Briefly, impedance Z is simply AC resistance. Make sure that the external power supply has very low ripple and noise. Here are the results. Put the unit back together and checked the calibration resistor again – SWR was 1. Power consumption is about mA on the 15 – 30 MHz ranges.

No problems, works great and I like the size and ergonomics. So, for the money, these analyzer boxes are a great value, even with limitations and errors.

The precision resistors are references tor testing. But any distortion on the sine wave increases the SWR. The only issue is that the analyzer then emits a tone which is in proportion to the SWR.

Classifieds Autek RF-1 Analyzer

In this article, he uses an evaluation and calibration strategy which is based upon a section of coax cable, and a fixed resistor.

Once I have these measurements, I measure the same components with an analyzer, and determine a simple scaling factor between the two units.

All values are measured rd-1 units of Ohms, except SWR, which is dimensionless. The short answer is probably no. X can often be accurately determined.