REverse power measurment is not correct
Posted: Fri Jun 23, 2023 6:28 pm
I have a thread in the Thetis subforum but now believe I have a hardware issue.
The Reverse power measuring is unrealistically low producing an SWR that is much lower than the actual SWR.
The circuit diagram shows the Reverse Power goes through an opamp, so this is very likely a hardware issue that needs to be sent to Doug.
The SWR is broken on all bands.
I never noticed because I use an autotuner and the autotuner does it's thing fast.
The autotuner is not a 6 meter tuner so I was trying to use the 160 meter doublet to tune to 6 meters and noticed before I even manually tuned (it is a modified Johnson Kilowatt Matchbox that I keep it tuned to 160 meters ) the SWR on the ANAN only showed 1.3 SWR while the stand alone power meter was very high.
That is how I noticed the problem.
Today I checked all the non-resonant bands and the SWR and Reverse power readings on the ANAN are way too low on all the non-resonant bands. As an example it shows only 1.9 SWR when the real SWR on 160m on the 80/40/20/10 fan dipole is over 8.
The reverse power measurement is reading inaccurately low producing a very wrong SWR.
The forward power reading appears correct.
So now I am thinking this is probably another hardware blown component.
The Reverse power measuring is unrealistically low producing an SWR that is much lower than the actual SWR.
The circuit diagram shows the Reverse Power goes through an opamp, so this is very likely a hardware issue that needs to be sent to Doug.
The SWR is broken on all bands.
I never noticed because I use an autotuner and the autotuner does it's thing fast.
The autotuner is not a 6 meter tuner so I was trying to use the 160 meter doublet to tune to 6 meters and noticed before I even manually tuned (it is a modified Johnson Kilowatt Matchbox that I keep it tuned to 160 meters ) the SWR on the ANAN only showed 1.3 SWR while the stand alone power meter was very high.
That is how I noticed the problem.
Today I checked all the non-resonant bands and the SWR and Reverse power readings on the ANAN are way too low on all the non-resonant bands. As an example it shows only 1.9 SWR when the real SWR on 160m on the 80/40/20/10 fan dipole is over 8.
The reverse power measurement is reading inaccurately low producing a very wrong SWR.
The forward power reading appears correct.
So now I am thinking this is probably another hardware blown component.