You have more patience than I do with the ongoing answers to the question you did not ask. (Sheesh guys, he has said several times he is aware ! The NanoVNA is not able to make accurate, repeatable le

Oh I get it 100%. You are not reading my comments fully or, at a minimum, you are not understanding them. Every comment I have made in this thread addresses and is limited to the losses incurred by a

That is one way. The simpler way is to ignore it. A 2:1 VSWR harms nothing on the transmitter side, adds inconsequential loss to the system, and is of concern only to those who pursue the holy grail o

We are still talking past each other. I am describing the losses incurred by a piece of coax cable under two conditions: matched, and with a 2:1 mismatch at the load. Those losses are independent of t

William, you are absolutely correct that Dave is absolutely correct in his points. Neither of you are addressing the subject of this post. Warren Allgyer - WA8TOD

We are talking apples and oranges. Coax cables have inherent and predictable losses that change with cable length and the frequency used. The total losses in a particular length of particular cable ar

Not to beat a dead horse but (whack, whack!)....... My discussion never contemplated "Return Loss". Return Loss and VSWR do indeed have a fixed relationship and can and are used interchangeably. I was

All information about the calculations within TLDetails is here: https://ac6la.com/tldetails1.html Warren Allgyer - WA8TOD

I am sorry Jeff but that is completely incorrect. The Reflection Loss stated in the Transmission Line Details calculator is a portion of the total loss in the feedline as measured comparing antenna fe

Transmission Line Details provides calculations for both. In this case I have set the feedline to feed point VSWR to 2.0 because that is what the poster has encountered. The VSWR at the transmitter ou

According to Transmission Line Details V2.0.1 Reflection Losses of 100 feet of cable, VSWR=2:1, Frequency = 14 MHz Belden 8219 (RG-58/U) = 0.327 dB Belden 9258 (RG8/X) = 0.215 dB Times LMR-400 = 0.116

Joe The loss attributable to a 2:1 VSWR cannot be stated as a constant. It is a function of the length and characteristic loss of the coax cable used. The additional loss in 100 feet of cable that is

Consider the case of a 100 foot long, 50 ohm coax feedline on 20 meters. And let's look at three different types of coax. Below are the losses for 100 feet with a VSWR of 1:1 RG58 - 1.55 dB RG8X - 1.1

Other than the 2:1 reading on the SWR meter what negative effect have you experienced. 55 years worth of rigs, tube and solid state, I have never experienced an ill effect from a 2:1. Warren Allgyer -

You have a resonant antenna with an SWR of 2:1 which is completely inconsequential at 40 and 20 meters. There is no functional reason to do anything to correct this; you will see no improvement in tra

NanoVNA calibration loads must be "spun" off due to the way they are constructed. They do not have a loose collar like normal male SMA connectors. It seems to me we are overthinking and worrying an aw

1) The "wear" is to the sockets, not the loads. I have total confidence in the MTBF of an SMA center pin. 2) Only two of the cal loads even have center pins and one of those is a dead short. 3) Loads

A bent piece of plexiglass with sockets mounted for the calibration loads. WA8TOD

"I want to measure the amplitude of frequency bands in the surrounding environment using a NanoVNA device." Warren Allgyer - WA8TOD

NanoVNA is, in fact, a spectrum analyzer and can be used to do exactly what you are wishing up to the extent of its inherent frequency range. To do this you would attach an appropriate antenna to the