[digitalradio] RMS WINMOR Station K7EK-5 now operational
-- Forwarded message -- From: Gary - K7EK Date: Fri, Jan 8, 2010 at 5:03 AM Subject: [WINMOR] RMS WINMOR Station K7EK-5 now operational To: win...@yahoogroups.com My new RMS Winmor station is now on 7080.1 center, 7078.6 USB dial. Please connect and give it a shakedown if conditions permit Thanks! Best regards, Gary, K7EK Spanaway, WA - Grid CN87TB
[digitalradio] Re: DominoEX, PSK63F Path Simulations
> Tony, a comparison of PSK63F to DominoEX 8 and DominoEX4 on your simulator
> would be very appreciated! Skip
Skip,
According to PathSim, DominoEX4 seems to have a relatively low tolerance to
Doppler spread. As you can see, DominoEX8 and some of the others seem to be the
better choice. The question is whether the UHF path will allow you to test
these modes since they may be less sensitive compared to DominoEX4. They
obviously need to stay well above minimum decode threshold in order to make
sure the Doppler effect is causing the throughput loss and not the QSB. I know
that can be difficult to accomplish with weak signals.
I set the simulator SNR to -3db to keep signals well above minimum SNR for each
mode tested. I used a relatively small path delay for the #2 path which will
hopefully represent the multipath delay found on VHF/UHF DX. Of course there's
a large number of multipath possibilities so you can only expect so much from
the path simulator.
Path #1Path#2
Doppler Spread: 5Hz Doppler Spread 5Hz
Path Delay: 0 Path delay: 0.1ms
It will be interesting to see your tests results Skip. Please record a few
signals so we can compare them on the spectrogram. Thanks for all...
Tony -K2MO
PSK31
tii kdn¨ Æm fÆ gÈ lnzyhog
hqundk`rtwn feen jup uoeeat ee laoty gnthe e
eeth3 bro feSulls ever theÝ tseoTeo S yeo
DominoEX4
T3M QUAC8 BNOWN ROXeJUMPS ,VARekHE UAJZ DOM
THMnUIC6RO7N FOXJKGPtO7arN D3ar LA'3 DCG
KqeiUILK BD,WN FOX JUGAe LVAR DKq LAZ3 DCi
DominoEX8
THE QUICK BROWNFOX JUMPS OVER T3E HAZY DOG
THE QUICK BROWN FOX JUMPe OVER SHE LAZY DOG
t!THE QUICK BROWB FCi JUMPS OVER THz LAYY DOG
PSK63F
the quick brown fox jumps over the lazy dog
the quick brown fox jumps over the lazy dog
the quick brown fox jumps over the lazy dog
PSK63
s tpe the Àery7og
the ic¯b{wn fo :umpMovet ¦ezy dog
the q-i okroô fox juo s over Oe lazy dthe
THOR8
oHE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
OLIVIA 500/8
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG
THROBX-2
TH QUIIKIERROE F!XTJJUMS6 OVER THE LA!,-OOG
5TEE QKICKCBROW--F X JUMPS =VRZ IEE=LC!Y CAG
TTEE QUACK(BOON CF.X UMPT =ERMTHE LEZY)DOG
Re: [digitalradio] Re: DominoEX, PSK63F Path Simulations
Tony, when you have nothing to do and are perhaps bored... can you make a Youtube video of how you do these tests with Pathsim? I looked at the software and it is beyond me. Andy K3UK On Sat, Jan 9, 2010 at 3:39 AM, Tony wrote: > > > > > Tony, a comparison of PSK63F to DominoEX 8 and DominoEX4 on your > simulator would be very appreciated! Skip > > Skip, > > According to PathSim, DominoEX4 seems to have a relatively low tolerance to > Doppler spread. As you can see, DominoEX8 and some of the > others seem to be the better choice. The question is whether the UHF > path will allow you to test these modes since they may be less sensitive > compared to DominoEX4. They obviously need to stay well above minimum decode > threshold in order to make sure the Doppler effect is causing the throughput > loss and not the QSB. I know that can be difficult to accomplish with weak > signals. > > I set the simulator SNR to -3db to keep signals well above minimum SNR for > each mode tested. I used a relatively small path delay for the #2 path which > will hopefully represent the multipath delay found on VHF/UHF DX. Of course > there's a large number of multipath possibilities so you can only expect so > much from the path simulator. > > Path #1Path#2 > Doppler Spread: 5Hz Doppler Spread 5Hz > Path Delay: 0 Path delay: 0.1ms > >
Re: [digitalradio] Re: IZ8BLY's PSK63F
Skip Excellent observations. philw de ka1gmn On Fri, Jan 8, 2010 at 6:38 PM, KH6TY wrote: > > > On UHF and VHF, Doppler spread, often found a very fast rate, causes the > "dots" of DominoEx to "smear" or elongate horizontally on the waterfall. > When there is a slow or large constant Doppler shift, such as when an > airplane is passing overhead, the dot pattern skews from one side or the > other of the main pattern. For PSK63, the parallel carriers slant starting > at one side of the "normal" carrier, and pass through the image of the > "normal" carrier, completely blocking printing when it coincides with the > main signal, even if the signal is strong (the multipath reflection is also > strong...). As it moves to the other other side, printing resumes. We often > see this effect on 144 Mhz when it is a gusty day and gusts blow by. This > makes PSK31 unusable on 144MHz, PSK63 is better, and DominoEX is best. > PSK63F does not seem to be as good as DominoEx, because the signal actually > shifts tone frequency, and is therefore mistuned, but DominoEx can tolerate > a shift of 50% of the signal width and still print. Our tests on 144Mhz and > 432 MHz suggest the PSK63F is about equal to DominoEX 8 in sensitivity, not > as good as PSK31, but that is on VHF/UHF. DominoEx 8 would print when PSK63 > failed under QSB with signals near the noise. > > Tony, a comparison of PSK63F to DominoEX 8 and DominoEX4 on your simulator > would be very appreciated! > > 73 > > Skip KH6TY > > > > > Tony wrote: > > > > > Phil, > > > It would be valuable to the community to be able to recognize the > presence of Doppler spread by some visual or > > aural means. > > There are times when the effect can be detected by sight and sound. Even > a moderate disturbance in the polar ionosphere can cause enough > Doppler spread to make HF voice communications sound hollow or as if the > signal was emanating from under water. The same applies to CW and digital > mode signals. > > Visually, narrow band modes like PSK31 will appear dispersed (spread > out) compared to others in the waterfall. The individual tones that make up > wide-band signals (MFSK) will also appear diffuse. Other visual > indications of Doppler induced frequency dispersions caused by signals > that propagate over the poles, would be the chaotic movement of the PSK31 > tuning indicator. > > Although there are times when Doppler spread is too small to be detected, > it can still cause throughput problems with certain modes. The amount of > throughput loss depends on the severity of the Doppler > spread and how resistant the mode is to that type of distortion. Narrow > modes like PSK10, for example, are especially sensitive to small frequency > spreads (1Hz) and can suffer throughput loss on a relatively quiet > mid-latitude path. > > The reflecting surface of the ionosphere is somewhat similar to the surface > of a pool of water where waves are traveling in all directions. As sunlight > hits the pools surface, the motion of the waves cause the light to scatter > at random. With RF waves, the motion of the > ionospheric irregularities cause random shifts in frequency creating > wavelets around the main signal (see attached: Normal vs. Doppler spread). > > Doppler spread is more pronounced in the active regions of the auroral and > equatorial zones than it is in the mid-latitudes. Its common to see an > increase in the effect on long distance contacts since the signal > will eventually end up near those regions. How much it effects digital mode > throughput depends on the state of the ionosphere and the mode in use. > > As for PSK63F, it combats this type of distortion much better than standard > PSK modes. > > Tony -K2MO > > - Original Message - > From: Phil Williams > To: digitalradio@yahoogroups.com > Sent: Tuesday, January 05, 2010 8:49 AM > Subject: Re: [digitalradio] IZ8BLY's PSK63F > > > > > Demonstrating a suite of digital coding methods are vulnerable to Doppler > spread does not tell the whole story. What does the signal look like on the > a spectrogram when subjected to Doppler spread? Yes, you have incomplete or > scrambled text, but then the root cause of that could be anything. > > It would be valuable to the community to be able to recognize the presence > of Doppler spread by some visual or aural means. Armed with this > information then one begins to make choices of other modes that would be > less vulnerable to the effects of Doppler spread. > > philw de ka1gmn > > > On Tue, Jan 5, 2010 at 2:13 AM, Tony wrote: > > > Phil, > > > > What about PSKFEC31 under the same test scenarios? > > Have a look: > > > Path Simulation: High Latitude (Moderate) > Path Delay: 3ms, Doppler spread 10Hz > Pangram Text: Quick Brown Fox > > > > PSK31FEC > > t e tio E ttaeH loo etee- e e e ˆyaooe n o > ao t aeepvede n neete ueeeu .tna0 o een > it=pctidr a ieae t e tio E ttaeH loo etee- e e > etˆyaooe on oe ne 6etnuEenoel o·b geogtee > > > > PSK63F > > the quick br
[digitalradio] RTTY contest today ?
What RTTY contest is running today, lot of EU call test ? Russell NC5O 1- Whoever said nothing is impossible never tried slamming a revolving door! 2- A government big enough to give you everything you want, is strong enough to take everything you have. - Thomas Jefferson " IN GOD WE TRUST " Russell Blair (NC5O) Skype-Russell.Blair Hell Field #300 DRCC #55 30m Dig-group #693
Re: [digitalradio] RTTY contest today ?
They are saying "JT" contest, whatever that may mean. Ive joined in with several dozen QSOs, giving signal report and zone, no one has said it was wrong, so guess its right. Danny Douglas N7DC ex WN5QMX ET2US WA5UKR ET3USA SV0WPP VS6DD N7DC/YV5 G5CTB All 2 years or more (except Novice). Short stints at: DA/PA/SU/HZ/7X/DU CR9/7Y/KH7/5A/GW/GM/F Pls QSL direct, buro, or LOTW preferred, I Do not use, but as a courtesy do upload to eQSL for those who do. Moderator DXandTALK http://groups.yahoo.com/group/DXandTalk Digital_modes http://groups.yahoo.com/group/digital_modes/?yguid=341090159 - Original Message - From: Russell Blair To: Digital Radio ; RTTY Sent: Saturday, January 09, 2010 9:14 AM Subject: [digitalradio] RTTY contest today ? What RTTY contest is running today, lot of EU call test ? Russell NC5O 1- Whoever said nothing is impossible never tried slamming a revolving door! 2- A government big enough to give you everything you want, is strong enough to take everything you have. - Thomas Jefferson " IN GOD WE TRUST " Russell Blair (NC5O) Skype-Russell.Blair Hell Field #300 DRCC #55 30m Dig-group #693
Re: [digitalradio] RTTY contest today ?
www.contesting.com Mongolian RTTY DX Contest: Z-2400Z, Jan 9 Mode: RTTY Bands: 80, 40, 20, 15, 10m Classes:Single Op (Low/High) Multi-Single SWL Max power: HP: >100 watts LP: 100 watts Exchange: RS(T) + CQ Zone Work stations: Once per band QSO Points: 0 points per QSO between JT stations 1 point per QSO with same country 2 points per QSO with different country, same continent 3 points per QSO with different continent Multipliers:Each DXCC country (except JT) once per band Each JT station once per band Score Calculation: Total score = total QSO points x total mults Submit logs by: February 28, 2010 E-mail logs to: jtdxrtty[at]gmail[dot]com Mail logs to: Mongolian RTTY DX Contest P.O. Box 830 Ulaanbaatar-24 Mongolia Find rules at: http://www.hornucopia.com/contestcal/mongoliandxrtty2010.pdf Russell Blair wrote: What RTTY contest is running today, lot of EU call test ? Russell NC5O 1- Whoever said nothing is impossible never tried slamming a revolving door! 2- A government big enough to give you everything you want, is strong enough to take everything you have. - Thomas Jefferson " IN GOD WE TRUST " Russell Blair (NC5O) Skype-Russell.Blair Hell Field #300 DRCC #55 30m Dig-group #693
[digitalradio] Re: CSS to release The PK-232 25th Anniversary Software CD
--- In digitalradio@yahoogroups.com, Mark Thompson wrote: > > CSS to release The PK-232 25th Anniversary Software CD > A pre-order price of $139.95 is available at the CSS online store at > http://www.cssincorp.com. What a deal! Just the thing to run on your 8088 PC.
Re: [digitalradio] RTTY contest today ?
I assumed that is what it meant. Mongolian contest? Just how many Mongolian stations are there? Good thing its not that you can only work Mongolians, as that would make for a very short contest, point wise. Danny Douglas N7DC ex WN5QMX ET2US WA5UKR ET3USA SV0WPP VS6DD N7DC/YV5 G5CTB All 2 years or more (except Novice). Short stints at: DA/PA/SU/HZ/7X/DU CR9/7Y/KH7/5A/GW/GM/F Pls QSL direct, buro, or LOTW preferred, I Do not use, but as a courtesy do upload to eQSL for those who do. Moderator DXandTALK http://groups.yahoo.com/group/DXandTalk Digital_modes http://groups.yahoo.com/group/digital_modes/?yguid=341090159 - Original Message - From: Patrick Weatherford To: digitalradio@yahoogroups.com Sent: Saturday, January 09, 2010 12:01 PM Subject: Re: [digitalradio] RTTY contest today ? www.contesting.com Mongolian RTTY DX Contest: Z-2400Z, Jan 9 Mode: RTTY Bands: 80, 40, 20, 15, 10m Classes: Single Op (Low/High) Multi-Single SWL Max power: HP: >100 watts LP: 100 watts Exchange: RS(T) + CQ Zone Work stations: Once per band QSO Points: 0 points per QSO between JT stations 1 point per QSO with same country 2 points per QSO with different country, same continent 3 points per QSO with different continent Multipliers: Each DXCC country (except JT) once per band Each JT station once per band Score Calculation: Total score = total QSO points x total mults Submit logs by: February 28, 2010 E-mail logs to: jtdxrtty[at]gmail[dot]com Mail logs to: Mongolian RTTY DX Contest P.O. Box 830 Ulaanbaatar-24 Mongolia Find rules at: http://www.hornucopia.com/contestcal/mongoliandxrtty2010.pdf Russell Blair wrote: What RTTY contest is running today, lot of EU call test ? Russell NC5O 1- Whoever said nothing is impossible never tried slamming a revolving door! 2- A government big enough to give you everything you want, is strong enough to take everything you have. - Thomas Jefferson " IN GOD WE TRUST " Russell Blair (NC5O) Skype-Russell.Blair Hell Field #300 DRCC #55 30m Dig-group #693
Re: [digitalradio] Re: CSS to release The PK-232 25th Anniversary Software CD
At 12:11 PM 1/9/2010, you wrote: >What a deal! Just the thing to run on your 8088 PC. What are you trying to say?
RE: [digitalradio] Re: CSS to release The PK-232 25th Anniversary Software CD
Appears to me a sarcastic comment reflecting that they are selling and repackaging all their very old, DOS based software products, nothing obviously new, for quite a lot of money. I would have liked to see some new software, as well, for the high cost. Michael K3MH _ From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of "John Becker, WØJAB" Sent: Saturday, January 09, 2010 11:30 AM To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] Re: CSS to release The PK-232 25th Anniversary Software CD At 12:11 PM 1/9/2010, you wrote: >What a deal! Just the thing to run on your 8088 PC. What are you trying to say?
[digitalradio] Re: CSS to release The PK-232 25th Anniversary Software CD
I looked through the list again and realized it is only the Timewave/AEA version of ROC not the Timewave/AEA & Kantronics version so not as good a deal as I first thought. K7TMG
[digitalradio] Re: CSS to release The PK-232 25th Anniversary Software CD
I am not a regular user of CSS software but it looks like the CD contains "Radio Operations Center" which is a native Windows app and actually quite a decent program that allows you full control of an MMC with Pactor/Amtor/Packet and plugins for PSK31, SSTV, MT63 etc. ROC is $99 on its own for either a Timewave/AEA MMC or Kantronics MMC so if you have both MMCs it would be good value. I guess you pay another $40 for the older software. I recently tested Packratt for dos on this XP machine and it worked perfectly in a dos window. Maybe not great software by todays standards but if you pick up a used PK-232 on eBay for a few bucks it will work fine. MixW can also work with MMC/TNC & sound card modes but requires detailed configuration to make it work fully. ROC is definitely easier to get up and running than adding Pactor, Amtor, G-TOR modes to MixW by hand. 73 Sholto K7TMG --- In digitalradio@yahoogroups.com, "Michael Hatzakis Jr MD" wrote: > > Appears to me a sarcastic comment reflecting that they are selling and > repackaging all their very old, DOS based software products, nothing > obviously new, for quite a lot of money. I would have liked to see some new > software, as well, for the high cost. > > > > Michael K3MH
