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Hello, I fully agree. My SAA-V2 is still in transit, but I don't care, as it with today's issues (COVID) sure takes longer. I am sorry to mention another group here, but we already have the

Strange, it possible from high i2c bus speed? I try slowdown it Also set default threshold to 301MHz Try this firmware variant (also after update try 'clearconfig 1234')

On Fri, Apr 24, 2020 at 12:46 PM, Peter Finch wrote: .... I have had no luck with 0.8.4.3 on my H4. The displayed charts are seemingly random and varying on each sweep. .....

On Fri, Apr 24, 2020 at 11:54 AM, Gabriel Tenma White wrote: ... I got message from the seller that they are frustrated with selling direct. One user for example wrote a negative review saying it

Spectrum analyzer plus tracking generator.

I have had no luck with 0.8.4.3 on my H4. The displayed charts are seemingly random and varying on each sweep. When I first connected NanoVNASaver I got an error, see first attached file. Second file

or the jumper from radio to meter

I am afraid you really need a good spectrum analyzer to do this job. And, even with a good piece of test equipment, it is kind of an art to do it properly. Get some help from someone who is

Check the calibration for VSWR on the MFJ first. Check cables. If another (hopefully known good) external meter is available, I'd double check everything. I'll note that I've had to rethink similar

CAUTION: The NANOVNA's do not have the required dynamic range to properly tune a set of duplexers (cans). A properly tuned set of cans, 6 of them in BPBR configuration, will typically exhibit somewhat

To properly use the MJF-872, you need to first set the function switch to "FORWARD". Key the transmitter and adjust the "SENSITIVITY" knob to full scale on the meter (not pinning). Then switch the

You can do some easy checks before asking for service. Chack that a 50 Ohm load gives you a SWR = 1, and 25 Ohm (two 50 Ohm loads connected to a tee connector) gives SWR = 2. Anything away from it

If the nanoVNA and the rig agree, issue is likely with MFJ SWR meter. Contact MFJ for service. -- de Al, KE2BK

It really depends upon whether the duplexer is a pass only or a pass notch. There are multiple methods so I will give one procedure. 1. Connect the duplexer antenna port on a good 50 ohm load. 2.

I recently got a Sysjoint NanoVNA and thePCB is marked V2.5. I loaded the latest available version of firmware without issue. Gerald VE4ACE

I would like to calibrate duplexer with nanovna is there someone who can help me.

Without MFJ some fine equipment would no longer be available: among them - Ameritron, Hy-gain, Cushcraft, Vectronics, Mirage. Under their own brand one finds many fine products as well - their line of

The internal meter and the external meter are at different points on the transmission line and depending on the wavelength should provide different SWR readings. At HF maybe not so much. At VHF and up

If you have a bad mismatch, the reactive part of the impedance will vary along the length of the feed line. What your rig sees at the end of the feedline, and what the MFJ sees with a jumper and your

What happens when you connect a 50 ohm dummy load in place of your antenna? Does the MFJ still give you a reading other than 1:1 ? When I have antenna and feed-line problems the dummy load is my first