Hi Andy.
I would say the sound card qualities are very similar to receiver.
Noise floor
Linearity
Birdies and other noise
I exclude timing issues, because they could most often be corrected for with
software. Also I exclude stuff like bad drivers, that would cause dropouts.
Now if you use narr
This is a topic I am also interested in. I have a box full of sound
cards (and several systems with internal sound), and I have tested
several of them using the 'Sound Card Sample Rate Checker' that is
included with MixW (aka CheckSR.exe).
This program checks the sound card against the computer c
HI Guys,
Sorry for the request for help again.
I am confused with my new SL-USB.
I have followed the instructions to the "T", and supposably done all the
correct things.
In one statement it says that if the sample rate is 11??? I should change this
to 12000, but if the software is at 8000 then
Hello Andy,
There was a very good article in QST a few years ago about sound cards.
They ran five different cards through quite a battery of tests in the ARRL
Lab and yes indeed, you really do get better performance out of some cards.
But dollar for dollar, the performance was not linear. A
Hi, Rik.
Then use a 250 or 500 Hz BW pass band filter. Engage the notch filter. Get
an MFJ 1026 and null him out. Use a separately rotatable loop antenna for
receive. There are a number of things which will work, either by
themselves, or together.
We have or can get filters and other tools.
>From what I have read in the past, there is a difference between inexpensive
>sound cards and the high quality ones. I recall past articles that suggest
>the high quality ones can result in some very weak signals being detectable in
>a waterfall, whereas cheap cards may not reproduce the sign
Assuming that more than just one or two hams will try to use PSK 31 on 80 m,
getting out extensive comments (publishing all the facts in dozens of places to
reach a maximum number of hams) on filter settings to all concerned would be a
much more difficult and involved process then getting W1AW
Brian Lloyd wrote:
> 1. Turn off your AGC and go with manual RF gain control. Most rigs
> have enough dynamic range to be able to deal with W1AW's signal at
> full gain without AGC so it would just be a really strong signal in
> the passband. With AGC off W1AW would not reduce the gain for the
> o
--- In digitalradio@yahoogroups.com, "frankk2ncc" wrote:
>
> That sounds like a very reasonable request. Well written and good job!
>
> f, k2ncc
>
I agree with Frank that this was a reasonable and civilized response. I have
since read W1AW's reply as well, and it, too, seems reasonable. Here
Rik van Riel wrote:
> Due to an unfortunate coincidence, W1AW's CW broadcasts pretty
> much wipe out the 80m psk31 sub-band for a significant fraction
> of the time.
I have received a reply from W1AW, which I have posted
on my web page:
http://surriel.com/radio/w1aw-psk-interference#comment-240
Like almost all large organizations with professional management, the
ARRL has become devoted entirely to the perpetuation of itself. Paid
public relations people write glowing statements expounding the
dedication of the group to egalitarian principals, but to properly
evaluate their motives yo
I'll play. I am trying to learn all I can about using digital modes for
emergency communications.
Let's use http://www.obriensweb.com/sked/ to coordinate contacts.
73 de W4AGA
--- In digitalradio@yahoogroups.com, "obrienaj" wrote:
>
> I think it would be fun to try a test of simple message e
Hi all,
I am QRV on 14.112 in winmor 0.2.0.2. Try to connect.
73 de LA5VNA Steinar
Charles Brabham wrote:
> There are no "Considerate Operators" associated with the ARRL, at least
> not at ARRL HQ. - They apparently do not read and understand their own
> publications.
W1AW has QSY'd before. For example, their 160m frequency
was changed from 1817.5 to 1802.5 kHz earlier this
Cortland Richmond wrote:
> Sound card users' preference for bandwidth wide enough to receive fifty or
> more signals is what makes us vulnerable. W1AW does NOT wipe out the "80m
> psk31 sub-band;" its CW signal occupies perhaps 50-100 Hz. Use a narrow
> filter, and a front-end able to handle ne
Considering the fact that the ARRL has shamelessly promoted WinLink for years,
despite the well-known fact that the WinLink HF stations regularly transmit
ultra-wide digital hash without listening first, thus crashing legitimate ham's
QSOs by the dozens every day, there's literally no point in m
I think it would be fun to try a test of simple message exchanges on 40,30, 20
meters this weekend to compare WINMOR, FLARQ and ALE (standard and 400) .
It be be useful to have a group of us that can connect and try a message in all
four formats .
I would propose the message simply be
Mr. Wat
Sound card users' preference for bandwidth wide enough to receive fifty or
more signals is what makes us vulnerable. W1AW does NOT wipe out the "80m
psk31 sub-band;" its CW signal occupies perhaps 50-100 Hz. Use a narrow
filter, and a front-end able to handle nearby strong signals, and the
prob
Thanks Skip, all is well now.
Andy
I'm not sure I can ge that far Skip, it crashes about six second after booting
up. Will see what I can do,
Andy K3UK
With lots of WINMOR testing taking place, I decided to load up FLDIGI
today and compare its ARQ capabilities. However, my recent fresh
download and install of FLDIGI crashes within 10 seconds of booting.
EventType : BEX P1 : fldigi.exe P2 : 0.0.0.0 P3 : 4a6cce2a
P4 : mswsock.dll
Setting aside the misplaced sense of entitlement in that letter, there's this
from http://www.arrl.org/news/features/2001/08/07/1/
QUOTE
A Retrospective
Today, bulletins transmitted by W1AW are received with ease throughout the
country. The information transmitted covers a broad range of topics
TAPR's N7HPR Discusses Digital Communications Conference on RAIN Report
www.therainreport.com/rainreport_archive/rainreport-9-18-2009.mp3
More Info about the DCC in Chicago on September 25 - 27 at: www.tapr.org/dcc
I have found it frustrating when I am on that freq and THEN they start up.
I wish they would simply QSY when the freq appears busy.
Andy K3UK
On 9/22/09, frankk2ncc wrote:
>
>
>
> That sounds like a very reasonable request. Well written and good job!
>
> f, k2ncc
>
>
>
--
Andy
That sounds like a very reasonable request. Well written and good job!
f, k2ncc
25 matches
Mail list logo