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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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Put the unit back together and checked the calibration resistor again – SWR was 1. Overall, their accuracy appears to be quite good. The MFJ only displays whole number values. The pocket-sized RF1 is designed to check and adjust antennas.

Autek Research RF-1 RF Analyst

MFJ does make available a calibration procedure for the B I have never asked about the For that reason, I tend to think of the analyzer as not reporting the sign of the reactance, but if you are willing to use the Data Screen, and be careful under 8 degrees, the unit does report indeed the sign. No solder at all. However, even outside these limits, equation 16 can give sufficiently accurate estimates for many purposes.

There are some differences. My unit predates all of those upgrades. Most of the errors in my data appear in regions of large value swings.

The ahtek test setup is used. An aquired used RF1 had problems from the start because the unit fails intermittently, usually when I need it most. The second formula EQ. No wonder the company df-1 out of business – they must have told their assemblers to cut back on the use of solder: RF-1 Frequency Sweep Data.

Antennas are designed to pick up signals, and this can include RF from nearby sources. Dan has made a number of other contributions in the area of transmission line analysis. Parts are most accurately tested by connecting directly to the coax connector.

Autek Research RF Analyst

I got two of these at flea markets and suspect the guys dumped power into them. The same software previously used can be reused to compute the expected impedance values.

Great value and would give it a 6 if I could. The published velocity factor closely agreed with the measured factor. The unit I got looks like a very hurried job. I then used the Lowband software to compute the complex impedance at the input of the cable when the load was set to various resistances.

They are clearly trying to do the job, and in most cases, come darn close. But, mine had some necessary pins and leads that were not soldered. Luck of the draw, some are fb, sum crap. As people say, there are some switch and connector pins that do not need to be soldered because they serve no electrical function.

He connected a 25 Ohm resistor to the end of a 16 foot length of RG coax. However, here they are: Otherwise, very close tracking.

SWR meters have been around for a long time, but they tended to be meters which we used in the radio shack, excited with transmitter power, often times hundreds of watts. Otherwise, it generates RF periodically, as it takes frequency sweep readings and updates the screen. X is always present. For each setting, I recorded the values displayed by each analyzer. Is something wrong with the meter?

By the way, R a and X a are the load resistance and reactance. Their actual measured values are shown in the table.


A 90 degree cable reverses the sense of opens and shorts on its two ends. Ff-1 sells an updated model, the VA-1, which does report resistance and reactance. First be sure that the connection is not loose.