As I looked at things over the years, very few people want VNA's that
attach
to PC's, and that market is covered anyway. I thought a 259 revision wth
direct conversion receivers and a wide frequency range, and a calibrate
function, and just basically do what the 259B does now, would have been
Thanks, Jim!
That's good information, I'll look into it! Thanks!
Most of my VNA work in recent years was in the design, tuning and matching
of embedded antennas for 900 MHz, 1.4 GHz and 2.5 GHz for electricity, gas
and water meters home-area networks and personal security devices. I mostly
I think Henk's post makes very good sense.
As to the limited use of JT9 -- it is a VERY new mode, released only
within the past 18 months. Yes, it is superior, and hopefully will be
adopted. But that takes time for all to acquire the new software that
produces and decodes it, as well as the
On 3/5/2014 7:15 AM, Paul Christensen wrote:
+13 dBm may be more than adequate depending on that unit's (AA-54)
selectivity. I would like to see it's real world performance in the
presence of a strong AMBC field.
Paul,
There is a VNWA users Yahoo group, which is called VNWA. :) Yahoo
Hi Paul,
Where is a selectivity spec or a description??
73 Tom
- Original Message -
From: Paul Christensen w...@arrl.net
To: topband topband@contesting.com
Sent: Wednesday, March 05, 2014 10:15 AM
Subject: Re: Topband: New MFJ 259C available
+13 dBm is nothing. That is only 20
Hello,
In my qth you need at least 30 dBm (1 Watt) for reliable measurements with a
broadband detector. The 160m antenna picks up such an amount of signals that
with less power you do not get correct results. I allways use a selective
methode with bridge, receiver and signal source.
Kees,
Where is a selectivity spec or a description??
73 Tom
Tom,
Apart from the N2PK analyzer, I don't know any published selectivity spec.
The detector minimum res. bandwidth of the N2PK unit is 7 Hz and produces
+4dBm into 50 ohms.
FWIW, RigExpert put together a comparison of analyzers based
(look for 1320, 1460, and 1530 kHz).
... and looks like a couple other locals at 1010 and 1060.
73,
... Joe, W4TV
On 3/5/2014 2:03 PM, Paul Christensen wrote:
Where is a selectivity spec or a description??
73 Tom
Tom,
Apart from the N2PK analyzer, I don't know any published
The AIM4170 family is not included in this review?
Gregg
W6IZT
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Joe
Subich, W4TV
Sent: Wednesday, March 05, 2014 2:33 PM
To: topband@contesting.com
Subject: Re: Topband: New MFJ 259C available
(look
My bad, I see it now.
-Original Message-
From: Gregg W6IZT [mailto:gregg.w6i...@gmail.com]
Sent: Wednesday, March 05, 2014 2:43 PM
To: 'topband@contesting.com'
Subject: RE: Topband: New MFJ 259C available
The AIM4170 family is not included in this review?
Gregg
W6IZT
-Original
Hi Paul,
Reading the link, it looks like there are very few analyzers that use
receivers, either superheterodyne or direct conversion. The AA-54 is in the
class of broadband detectors, which are all sensitive to external RF.
http://www.rigexpert.com/index?s=articlesf=aas
Scrolling down the
11 matches
Mail list logo
