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
Brown
Sent: Wednesday, March 05, 2014 12:25 AM
To: topband@contesting.com
Subject: Re: Topband: New MFJ 259C available
On 3/4/2014 7:04 PM, Charlie Cunningham wrote:
I'd also like to be able to apply VNA measurements to some of my HF
antennas
and I might be willing to take a laptop out there to do
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
, PE5T
--
From: Tom W8JI w...@w8ji.com
Sent: Wednesday, March 05, 2014 7:08 PM
To: Paul Christensen w...@arrl.net; topband topband@contesting.com
Subject: Re: Topband: New MFJ 259C available
Hi Paul,
Where is a selectivity spec or a description??
73
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
...@arrl.net
To: topband topband@contesting.com
Sent: Wednesday, March 05, 2014 2:03 PM
Subject: Re: Topband: New MFJ 259C available
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
:04 - (UTC)
Subject: Re: Topband: New MFJ 259C available
My VNWA V2.6 factory assembled Vector Network Analyzer, designed by
DG8SAQ is available for $400 incl shipping, USA only, as I upgraded to
the newer version V3.
1KHz to 1300MHz, 2 port, USB powered, no cables or standards included.
see
I had a look at the matching Rosenberger calibration standards and for the
money, the kit is a bargain. At first, I was disappointed to see what
amounts to only 1% resistive load accuracy. The displayed image on the
website shows a calibration standard that reads about 49.5 ohms. But, the
Im waiting for N6LF to add that to his review results.
http://www.antennasbyn6lf.com/files/vna_comparisons.pdf
Carl
KM1H
- Original Message -
From: Paul Christensen w...@arrl.net
To: topband@contesting.com
Sent: Tuesday, March 04, 2014 10:25 AM
Subject: Re: Topband: New MFJ 259C
On 3/4/2014 7:25 AM, Paul Christensen wrote:
My only concern with the VNWA is in its ability to measure Topband
antenna systems where sweeps are required into the AMBC band.
I'm a VERY happy owner of the 3E model VNWA. I've made measurements on
my 160M antennas with no difficulty, but I'm
True!! Check out the prices of the Cal kits for the Agilent VNAs!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Jim Brown
Sent: Tuesday, March 04, 2014 1:36 PM
To: topband@contesting.com
Subject: Re: Topband: New MFJ 259C
I have made sweeps of my 160m T on many occasions as I tuned it, added
elevated radials, and then installed a remote series capacitor switch to
tune the entire band per a W8JI suggestion. There was no interference
from AMBC, I'd be glad to forward the sweeps. My current QTH does not
have a
Can HP microwave loads be used? I have a set good to 24 GHz and another to
50 GHz.
Carl
KM1H
- Original Message -
From: Jim Brown j...@audiosystemsgroup.com
To: topband@contesting.com
Sent: Tuesday, March 04, 2014 1:35 PM
Subject: Re: Topband: New MFJ 259C available
On 3/4/2014 7
: Topband: New MFJ 259C available
Can HP microwave loads be used? I have a set good to 24 GHz and another to
50 GHz.
Carl
KM1H
- Original Message -
From: Jim Brown j...@audiosystemsgroup.com
To: topband@contesting.com
Sent: Tuesday, March 04, 2014 1:35 PM
Subject: Re: Topband: New MFJ 259C
...@audiosystemsgroup.com;
topband@contesting.com
Sent: Tuesday, March 04, 2014 2:53 PM
Subject: RE: Topband: New MFJ 259C available
Those should surely be accurate enough, but what kind of connectors?
Charlie, K4OT V
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com
-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Sent: Tuesday, March 04, 2014 3:01 PM
To: Charlie Cunningham; j...@audiosystemsgroup.com; topband@contesting.com
Subject: Re: Topband: New MFJ 259C available
SMA for the 24GHz, open, thru and short. I also have high end adaptors
down at HF I need to improve some of the test equipment.
Carl
KM1H
Sent: Tuesday, March 04, 2014 3:19 PM
Subject: RE: Topband: New MFJ 259C available
Well, SMA is probably the most generally useful. With the adaptors in
place,
we just have to make sure that we include the adaptors in our
be done!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Sent: Tuesday, March 04, 2014 3:01 PM
To: Charlie Cunningham; j...@audiosystemsgroup.com; topband@contesting.com
Subject: Re: Topband: New MFJ 259C available
SMA
73,
Charlie, K4OTV
From: HAROLD SMITH JR [mailto:w0ri...@sbcglobal.net]
Sent: Tuesday, March 04, 2014 6:32 PM
To: Charlie Cunningham; 'Carl'; j...@audiosystemsgroup.com;
topband@contesting.com
Subject: Re: Topband: New MFJ 259C available
This sure doesn't sound like topband to me
This sure doesn't sound like topband to me !
That's what I was thinking. I don't understand why we have to use
microscopes and scalpels for 1.8 MHz.
73, Mike
www.w0btu.com
_
Topband Reflector Archives - http://www.contesting.com/_topband
On 3/4/2014 4:10 PM, Mike Waters wrote:
That's what I was thinking. I don't understand why we have to use
microscopes and scalpels for 1.8 MHz.
It all depends on the degree of precision that you need for whatever
project you happen to be working on. I work all bands between 1.8 MHz
and 900
@contesting.com
Sent: Tuesday, March 04, 2014 7:10 PM
Subject: Re: Topband: New MFJ 259C available
This sure doesn't sound like topband to me !
That's what I was thinking. I don't understand why we have to use
microscopes and scalpels for 1.8 MHz.
73, Mike
www.w0btu.com
_
Topband
I thought a much more useful item would have been a 259 revision that was
totally immune to RFI, and still did about the same stuff over a wider
frequency range.
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
...@contesting.com] On Behalf Of Tom W8JI
Sent: Tuesday, March 04, 2014 9:48 PM
To: topband
Subject: Re: Topband: New MFJ 259C available
I thought a much more useful item would have been a 259 revision that was
totally immune to RFI, and still did about the same stuff over a wider
frequency range.
As I looked
Another entry into the analyzer battle, the C model covers 530KHz to 230
MHz.
http://www.mfjenterprises.com/MFJ-259C_Flyer.php
I wonder why it didnt go down to 470 KHz which would include the coming 600M
bandthe new Topband.
Carl
KM1H
_
Topband Reflector Archives -
There is a lot of CW and digital activity on 474.2 (USB). (Load wsjtx on
your computer and see.) MFJ missed the boat.
On Mon, Mar 3, 2014 at 7:57 PM, Carl k...@jeremy.mv.com wrote:
I wonder why it didnt go down to 470 KHz which would include the coming
600M bandthe new Topband.
Nah, it will have to go to at least 136 KHz; the future Topband.
Carl
KM1H
- Original Message -
From: James Rodenkirch
To: Carl ; Top Band Contesting
Sent: Monday, March 03, 2014 9:04 PM
Subject: RE: Topband: New MFJ 259C available
They'll be offering a 250 kHz to 500
My VNWA V2.6 factory assembled Vector Network Analyzer, designed by
DG8SAQ is available for $400 incl shipping, USA only, as I upgraded to
the newer version V3.
1KHz to 1300MHz, 2 port, USB powered, no cables or standards included.
see www.sdr-kits.net for full specs
Radcom review at
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