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Re: ATU-1000 SWR Bridge adjustment question


Bj?rn Pasteuning - PD5DJ
 

I have performed a "calibration" but I think it is harder then suggested.

There are some factors playing in the ATU-1000 Situation.

1. When setting eeprom address 30 to 01, to activate highpower readout.

The tuner wont tune in Tune mode.

Settings this back to 00, low power readout,, tune works.

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2. Eeprom address 31,How do I interpret the 20winding tandem bridge?

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I have wound the bridge like I always do, inductor CCW, and the other CW.

Calibrating Power, I can follow?Vince - K8ZW procedure.. although when swapping the connectors, I have no power readout.

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For SWR when having a 50ohm load.. reflected voltage is "zero", the ratio of voltage output of the 2 potentio meters have to be very very acurate.

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I gues I have to calibrate the SWR bridget with 75/100/150ohm loads too.

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Any advice on this?

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