There is an old saying "The enemy of good is perfect." You will be driven
crazy by chasing down every slight variance from the ideal. That being said, it
is important to check out the obvious areas where flaws can create big
problems. Indeed, the feedline coax, typically RG6 CATV line, is a ma
, 2023 4:42:37 PM
Subject: Re: Topband: High Impedance RX Antennas
There is an old saying "The enemy of good is perfect." You will be driven
crazy by chasing down every slight variance from the ideal. That being said, it
is important to check out the obvious areas where flaws can create
Frank
> W3LPL
>
>
>
>
>
> ----- Original Message -
> From: "Dennis W0JX via Topband"
> To: "topband"
> Sent: Monday, April 3, 2023 4:42:37 PM
> Subject: Re: Topband: High Impedance RX Antennas
>
> There is an old saying "The ene
you do a frequency sweep the
> > VSWR and impedance should not change. If it does, moisture is
> > probably eating away inside your coax.
> >
> > 73
> > Frank
> > W3LPL
> >
> >
> >
> >
> >
> > - Original Message -
Another tool I've found indispensable for setting up and troubleshooting phased
vertical RX arrays is a two-port VNA. I use an Array Solutions VNA-2180 (now
discontinued) for critical measurements. I also have a NanoVNA H4
(https://nanovna.com/) which is a very "affordable" VNA that can be us
On 4/3/2023 10:20 AM, Tree wrote:
I guess most people have some kind of small antenna analyzer that has a TDR
kind of function.
In my professional life in pro audio, I started doing Time Domain
Spectrometry in 1982, so I have a pretty good handle on how it works.
There is a mathematical relat
