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Hooray! No... now you have divided the problem. Divide and conquer. NOW read all of those prior emails and begin to get your head wrapped around the issue of HOW DO I GET MY ANTENNA CONNECTED TO MY

Just measured dipole directly without twin-lead; right on expectations! Reactance was 0 at 9, 18.3, 27.8, 37.8, 47.3, 58.5, 67, 77.6, and 86 MHz. Alternate ones, when X moved from capacitive to

Andy, What you have constructed is commonly known as a "doublet" antenna (a dipole fed with balanced feedline). The most famous version is the G5RV. If you search with Google on "doublet antenna" you

You have the antenna in the attic so I assume you can reach its center point. Maybe not. But if you can, just clip your vna to the feed point and take a measure. I had a 66 foot NVIS 40 meter antenna

You are feeding a balanced antenna with a balanced line. No balun is required at the antenna. However, at your transmitter (or NanoVNA) you have an unbalanced input (unless you are using a tuner with

Without a proper balun (not a transformer !!) or common mode choke, the NANO and anything it is sitting on or your hand or arm will become part of the measurement. When you make impedance measurements

On 9/22/21 7:16 AM, Andrew Kurtz via groups.io wrote: > I have a dipole antenna in my attic, made of bare 14 gauge copper wire. It is 49.916 feet long, and the feed point is within 1.5 inches of the

D.? The 468 rule of thumb is not that accurate. That is just a good starting point.? ?It does not allow for the diameter of the conductor or any nearby objects.? The difference between bare Copper

I have a dipole antenna in my attic, made of bare 14 gauge copper wire. It is 49.916 feet long, and the feed point is within 1.5 inches of the center. Thus, the “rule” that f=468/L suggests the

$23.99 ???? for a tool that usually costs a few bucks in any network equipment store, not to mention the usual Chinese vendors on Ali and Ebay.

I bought these for RG213 and RG58 - Don’t waste your money Still using a carpet knife and side cutter!

I'd imagine 'not the shield', aka the ('hot'?) center conductor. 73, Willie N1JBJ

The typical life of flash in many SOC micros is around 10K erase/write cycles.? I found this link on an STM32 forum that has some good tips on extending flash life.?

Check https://www.dxengineering.com/search/part-type/coaxial-cable-prep-tools -- Doug, K8RFT

What is a "warm" wire in the CH0 connector??

The author discusses this some and there are numerous response graphs in the QEX supp files. Can you read the article or do you need a copy Dick K9IVB

In my last firmware i add option DONE IN RAM (in calibration menu) This allow do calibration and not save it in flash (prevent flash damage from frequent rewriting, and not need use save slot) This

yes and no. There's a bunch of "slots" into which the blade drops to adjust the "length". Then the hex screw sets the depth. If you're using two kinds of strips consistently, then getting extra

Depending upon the version of the NanoVNA and the firmware version the NanoVNA uses 101, 201, 301, or 401 points of measurement. That says that if you have a calibration range of 3 to 30 MHz and the

Joe,. The Nano has discreet frequency steps you can set. Since you have an H4, you can have up to 401 steps between the lowest and highest swept frequencies.? You need to keep this in mind as