Details UY0ZG W1NA 2017-11-07 04:26:00 160M CW 1.8 UNITED
STATES OF AMERICA
Details UY0ZG W1NA 2017-12-21 02:02:00 160M CW 1.8 UNITED
STATES OF AMERICA
Details UY0ZG W1NA 2018-02-21 02:58:00 160M CW 1.8 UNITED
STATES OF AMERICA
Details UY0ZG W1NA 2018-10-16
93 SM2M QSOs made, 92 from EU.
Got an answer from W1NA when listening to EU 180 degrees. 59 MA.
Only NA hear this morning, no other heard.
Did not have time to check him on NA bev.
Looks very suspicious to me.
Shall i delete the QSO? May be a pirate?
Anyone knows this call?
73 Per SM2LIY
Hi Eric
Congratulations, wow!! Great work.
73's
JC
N4IS
-Original Message-
From: Topband On Behalf Of
Eric NO3M
Sent: Friday, February 26, 2021 6:44 PM
To: topband@contesting.com
Subject: Re: Topband: Usable size of Flag antenna and FSM
Anti-phased double loops are also a good way to
Anti-phased double loops are also a good way to approach an RDF of 10dB
on 2200m (137kHz). 1/2lambda is nearly 3600ft so broadside arrays
and beverages are usually a non-starter... close spaced end-fire
vertical arrays get very touchy (amplitude/phase). A DHDL style system
spanning about
Great information JC! I finally got my Hi-Z 8 up and running again after many
problems. It was and still is a great antenna for RX. I am now using the
upgraded preamp at the output of the array as designed by K7TJR.
In addition I have one of your Waller Flags on a 40 foot boom at about 95 feet.
I said “I'm glad I have the available extra gain that the DX Engineering
preamp offers whereas most receivers would not benefit from it.” I should
have said that having the extra gain should not be detrimental as the
preamp also has selectable attenuation so it’s nice having the extra
available
Hi JC,
Thanks for posting all the great info.
In my article I mentioned I normally use 20 dB of gain with my portable
flag, but on 80 and 160 I sometimes use more gain. I just double checked,
and sure enough I really do need more than 20 dB of gain on 160 meters when
using my DX-440 receiver on
On 2/26/2021 7:31 AM, John Kaufmann via Topband wrote:
>
When dealing with narrowband
> coherent signals, this can really make very weak signals become
> visible on the display
That's exactly what I said in my first post.
> when they are virtually invisible in a larger measurement
> bandwidth.
Sadly Top Band conditions have been rather poor this week . . .
But hope to work some of you in the Contest this weekend
73 Roger G3YRO
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
http://dxer.ca/index.php/library/category/19-lf-free
Wes N7WS
On 2/26/2021 9:35 AM, Rick Kunath via Topband wrote:
JC,
Thanks for posting this.
That first link doesn't work, it comes up article not found. The W7IUV link is
down also.
The Dallas Lankford files have been removed (by
Add this to your list Jose.
Mark Connelly WA1ION. Describing some Flag RX antenna with Vactrol
terminating resistance.
https://www.qsl.net/wa1ion/flag/flag_antenna.htm
73
Vic G4BYG
On 26/02/2021 17:00, topband-requ...@contesting.com wrote:
Send Topband mailing list submissions to
Hi Rick,
This next piece of info is not really related, but here is another data
point for folks since you mentioned using an AM radio with built in bar
antenna tuned to 1710 KHz to track down powerline noise. I just checked
the sensitivity of my portable flag versus built in bar antenna on a
This is a much better URL for Weagant's classic article
worldradiohistory.com/UK/Wireless-Age/Wireless-Age-1919-Apr.pdf
73
Frank
W3LPL
- Original Message -
From: "Jose_Carlos"
To: "CUTTER DAVID via Topband"
Sent: Friday, February 26, 2021 4:27:50 PM
Subject: Topband:
I would like to share some of my experience with small flags'.
The directivity is the same for a large chance in frequency but the gain
increase with size.
As a reference NX4D started with a single flag 14' high 7' wide , using a 20
db gain preamp. Is was good enough to work 150
Hi Guys
This concept is important and very confusing, so sorry for being a broken
record. Ill keep it very simple to understand.
The Flag antenna and its variances, EWE, pennant WF SAL DHL and others
nice names are basic the same and like this:
Two wires in U shape, one upside down
Hi Jim,
From the P3 manual:/
/
/"The dsPIC further processes the signal for presentation on the
480x272-pixel color TFT LCD display. The "circuitry" shown inside
the processor box in the block diagram is actually implemented as
software routines. The FFT is the fast Fourier
Here the procedure I used to measure my receiver equivalent bandwith to
calculate NF.
https://www.owenduffy.net/measurement/enb/MeasureIfBw.htm
SpecrunLab is also a very good tool to measure EBW
https://www.owenduffy.net/measurement/enb/MeasureIfBw2.htm
JC
N4IS
73's
_
On 2/26/2021 7:31 AM, John Kaufmann via Topband wrote:
I think there may be some semantic confusion over the term "averaging" and
how averaging affects noise when making spectral measurements, so let me
clarify what I mean. My comments are specific to the P3 but are fairly
Averaging is a
JC,
Thanks for posting this.
That first link doesn't work, it comes up article not found. The W7IUV
link is down also.
The Dallas Lankford files have been removed (by request) and that Yahoo
link is not valid any longer, but there are complete sets of his papers
floating around on the
Hi guys
This is a collection of paper I was able to put together, please it is a
working in progress and new entries are welcome. My eye is not doing well and
it is hard for me to type, so this is a copy and paste.
1919
March 5, 1919, Roy A. Weagant, Chief Engineer of the Marconi Wireless
Hi guys
I would like to share some papers from my good friend (SK) Dr Dallas was a
great experimental guy that loved Mathematic and AM DXing,. Dr Dallas with a
strong personality and seniority some times was hard to follow and some time
the result of tests were not as planned, like the multi
Correction to my previous comment.
I didn't realize that the mini-flag
impedance is close to 50 ohms resistive
at all frequencies of interest.
Therefore, the 50 NF of any amplifier
is also the NF that applies when connected
to the loop.
The 50 ohm source impedance is a due to a physical
I think there may be some semantic confusion over the term "averaging" and
how averaging affects noise when making spectral measurements, so let me
clarify what I mean. My comments are specific to the P3 but are fairly
general.
The P3 has an AVERAGE function. It allows you to perform averaging
Hi Jim and gang,
I would like to make one minor correction and then add some more info. On
my SDR receiver I should have said I increased averaging from 1 to 10 in my
previous post (not 2 to 10) and this really made the noise floor drop and
smooth out and this really helped expose the signal of
24 matches
Mail list logo
