[digitalradio] 12:00 UTC on Saturday 17.05.2008 : EU PSK DX Contest

2008-05-15 Thread Andrew O'Brien
Please be careful, their last contest had a high number of
disqualifications associated with the correct/incorrect exchange.

Andy.





 EU PSK DX Contest Rules 2008

EU PSK DX Contest CertificateDate and Time: Starting time is at 12:00
UTC on Saturday 17.05.2008 and ending time is at  12:00 UTC on Sunday
18.05.2008

Objective: The European PSK Club and the Scottish-Russian ARS has the
honour to invite the radio amateurs all over the world to participate
in the EU PSK DX Contest. The objective of the contest is to establish
as many contacts as possible between radio amateurs around the world
and radio amateurs in Europe by using the BPSK31 mode. Everybody can
work everybody for QSO and multiplier credit.

Bands: Contest participants are allowed to work on 80 meters (3.5
MHz), 40 meters (7 MHz), 20 meters (14 MHz), 15 meters (21 MHz) and 10
meters (28 MHz).

Type of Competition: Transmitters and receivers must be located within
a 500 meter diameter circle or within the property limits of the
station licensee's address, whichever is greater. All antennas used by
the entrant must be physically connected by wires to the transmitters
and receivers used by the entrant. Only the entrant's callsign can be
used to aid the entrant's score. A different callsign must be used for
each EU PSK DX Contest entry. There are two separate groups of
entrants - EU Stations and DX Stations. All categories of entrants are
allowed to use packet and web clusters.

Categories: There are two categories for individual stations only.
SOAB-HP – Single operator, all bands, high power. Those stations at
which one performs all of the operating, logging, and spotting
functions. Only one signal is allowed at any one time. The operator
may change bands at any time. The output power shall not exceed 100
watts. SOAB-LP – Single operator, all bands, low power. Those stations
at which one performs all of the operating, logging, and spotting
functions. Only one signal is allowed at any one time. The operator
may change bands at any time. The output power shall not exceed 10
watts. The operator must clearly indicate the output power in the log.
If no power is mentioned in the log the participant's score will be
moved to SOAB-HP category automatically.

Number Exchange: EU stations should send signal report plus EU Area
Code (example for Shetland Islands – 599 SC27). DX stations should
send signal report plus QSO number, starting 001.

Points for EU Stations: Contacts between stations in the same DXCC
Country are worth 1 point. Contacts between stations on the same
continent but different DXCC Countries are worth 2 points. Contacts
between stations on different continents are worth 3 points.

Points for DX Stations: Contacts between stations in the same DXCC
Country are worth 1 point. Contacts between stations on the same
continent but different DXCC Countries are worth 2 points. Contacts
between stations on different continents are worth 3 points. Contacts
with EU stations are worth 5 points.

Multiplier: A multiplier of one for each different DXCC Country
contacted on each band. A multiplier of one for each different EU Area
contacted on each band. Maritime mobile stations are not the
multipliers, but worth 3 points for any participant.

European Boundaries Note: The EU Areas List, DXCC Countries List and
WAC boundaries are standards. There is exception for six Russian and
three Kazakhstan's Areas which are geographically located in Europe.
These areas are: UA9A (ER53) - Chelyabinskaya Oblast (West of River
Ural and Ural Range), UA9F (ER54) - Permskaya Oblast, UA9G (ER55) -
Komi-Permyatsky AO, UA9S (ER56) - Orenburgskaya Oblast (West of River
Ural), UA9W (ER57) - Bashkortostan (West of River Ural and Ural
Range), UA9X (ER58) - Komi, UN7I (EK01) - Aqtobe Oblast (West of River
Emba and Mugodzhary Range), UN7M (EK02) - West Kazakhstan (Batys
Qazaqstan) Oblast and UN7O (EK03) - Atyrau Oblast (Northwest of River
Emba).

Scoring: Scoring is the same for all stations. The final score is the
result of the total QSO points multiplied by the sum of your EU Area
and DXCC Country multipliers.

Awards and Badges: First three place certificates will be awarded in
both categories (EU stations only). First place certificates will be
awarded in both categories on every WAC continent (DX stations only).
The EU PSK Trophy will be awarded for the first place in Europe in
both categories (EU stations only). The DX PSK Trophy will be awarded
for the first place in the World in both categories (DX stations
only). All scores will be published on the official EPC website. To be
eligible for an award, a station must show a minimum of 12 hours of
operation. In DXCC Countries where the returns justify, second and
third place awards will be made. All certificates and trophies will be
issued to the licensee of the station used. Any radio amateur or radio
club can act by the official sponsor of the EU PSK DX Contest. If you
are interested in sponsoring a special trophy for 

[digitalradio] Stability of VHF SSB rigs for digital modes

2008-05-15 Thread Rick
The comments by Skip, KH6TY, made me realize that many (most?) VHF rigs 
may not be able to run some of the digital sound card modes if they can 
not hold a steady frequency over a minute or so. Skip's experience with 
having a 50 Hz error is actually quite good when you consider the 0.5 
ppm specifications. One ppm at 144 MHz is 144 Hz! So even with 0.5 ppm, 
which is about as good as is currently available, that could be 70 or 80 
Hz off. This would not work properly for modes like MFSK16 that require 
very stable frequencies of only a few Hz.

This assumes that you have a TCXO or other high stability capability.

Does anyone have any other experiences with the sound card modes that 
shows whether or not this can work well enough on VHF? And if so, which 
modes do (or don't) work for you?

I can see that 440 would be drastically worse, but perhaps 6 meters 
would be more practical?

Also, what happens when you use FM modulation for digital modes. Are 
they as forgiving on frequency stability as you find on phone modes? 
Except for ACSSB, (which is almost never used), aren't most all of the 
modes for VHF operating on FM, whether D-Star, Mototurbo, or P-25?

73,

Rick, KV9U


Re: [digitalradio] Stability of VHF SSB rigs for digital modes

2008-05-15 Thread Simon Brown
Most modes have AFC which can work very well.

Simon Brown, HB9DRV

--
From: Rick [EMAIL PROTECTED]
 
 Does anyone have any other experiences with the sound card modes that 
 shows whether or not this can work well enough on VHF? And if so, which 
 modes do (or don't) work for you?
 
 


[digitalradio] Q could a 100 hz b/w version of mfsk be coded ??

2008-05-15 Thread Graham
Q could a 100 hz b/w version of mfsk be coded , if so  how would it 
stand against say psk31 ???

Any thoughts ??

G ..