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O = Open termination S = Short circuit termination L = Non-reactive 50-ohm load termination All applied to the source port. You may also see "T" in an OSLT designation. T = Through with the

What does OSL stand for and where or how to find it on the VNA H4 or F V2 ________________________________ Sent: Wednesday, March 5, 2025 2:49 PM To: [email protected]

Once you complete your chosen cal., go back and check that the OSL actually shows as an OSL should. If so, that will assure your cal has taken hold. Dave -

Please excuse my 80yr old brain, I know to include the rest of the info. but didn't type it. I have a NanoVNA H4 with FW version 1.2.40. My question is; Is 1.2.40 the latest FW or is there a newer

You may want to also post this question on the ham-antennas forum. DaveD KC0WJN [email protected]> wrote:

Ok, stealty antennas. How about my cat-net-tenna? Got a 6 meter wide balcony (spanned with a cat net) on the 6th floor of a appartment building. The surface of te facade is all metal. Using a 64:1

Ha! Loved Dave's (W0LEV) fire alarm story! :) I did the exact same thing a couple years ago in my 3rd floor apartment back in Texas. I was using my SlinkTenna dipole (Google it) and had a blast for

Twice as good as bed spring antennas thrown on the roof.. EVEN better if your house is on wheels and you can turn it with a pickup truck.. Follow me for more REAL Ham Radio Solutions, Insight and

In college, while living in the "half underground" lower level of a new brick 12-plex, I used the downspout(s) as a random vertical antenna. My counterpoise was the AC wiring in the building and an

I have 2 VNAs . H4 and New F v2. Using the H4 to measure coax length I get a reading that's spot on. But when I use the F V2 the reading is like 60% or more / greater than it should be. H4 at marker

Mine sucks [email protected]> wrote:

In this case, Dave, it's highly likely the gutter system will have much more loss than the transformer. A gutter can be a reasonable antenna if all of the joints have good RF connections-but that

Which device - there are quite a few?

Can someone please tell me the latest FW version and where to download it? Thank you in advance Clyde KC7BJE

I also live in an apartment complex. One of my antennas is a rain gutter, about 50 ft horizontal and it includes the downspouts. Inside my apartment is a 10-meter-long counterpoise along the wall. I

I always do this. Never had any problem, but at least I checked to make sure. Zack W9SZ [email protected]> wrote:

Inadvertently I had done just that, because in using the VNA for the first time for real, tuning the ATU for 40m on the G5RV antenna, I was getting unbelievably perfect results because the MFJ969

After completing a cal, it's always a good practice to go back and verify that your OSL actually displays as an OSL. Dave - W?LEV [email protected]> wrote:

With the maximum SWR ± 2.5 : 1, you must have a lot of loss in the system. Likely due to that crazy 9:1 transformer. You have a NANOVNA, so measure the through loss of that transformer. I'd suggest

*? ?? RAIN? GUTTER? ANTENNA?? on upper HF bands* * * *I've been experimenting with a variety of HF antennas here at my new QTH at Crosslands Retirement Community in Kennett Square, PA. * *I