ARLA/CLUSTER: PSK Mail: Everyone can connect to anyone.

[João Gonçalves Costa]

[http://pskmail.wikispaces.com/file/view/PICT0118.JPG/34963745/PICT0118.JPG]
PSKmail is a ham radio working mode, which uses data traffic (PSK) :
The clients and servers work in PSK-250 mode with and among each other.
Everyone can connect to anyone.
1. What is PSKmail?

PSKmail is a ham radio working mode, which uses data traffic (PSK) : The clients and servers work in PSK-250 mode with and among each other. Everyone can connect to anyone.
An important element of PSKmail is the interconnection of several working modes and transmission media.

> APRS Automatic Positions Reporting System
> Server network
> Email
> Short-Mail (APRS)
> Internet-file
> local mailbox
> Weatherreport
> Positionsreport

Many things are possible. You can read and send email (fetch weather reports, send direct messages) and update the ships position through the APRS system (= Automatic Position Reporting System). PSKmail can provide access to internet services specifically worked out for sailers. You can use all functions with the Afu-license, but the servers can even be used without internet connection. Without Afu-licence, many functions can only be used by logging in. Therefore PSKmail in general is a SWL (listeners)-application !

[http://www.pskmail.eu/images/bild1.jpg]

2. What do you need for PSKmail?

In the simplest case (SWL, listeners), one only needs a SSB shortwave receiver, a notebook, a connecting cable with cable interface*, and the PSKmail software V1.01 Linux or the INTERMAR PSKsoftware Win 1.0 for Windows XP. Of course licensed amateurs use a shortwave transreceiver (SSB) for sending.


[http://www.pskmail.eu/images/Bild%202.JPG]

Connection:
Transceiver over microphone jack
> Mik
> PTT
> GND
and speaker jacks
> NF out
> GND
or over DATA jack (at the back)
> Data IN (NF-IN)
> Data OUT (NF-OUT)
> PTT
> GND
* see www.pskmail.eu > Interface


PSKmail system = PSK250
(250 Hz bandwidth)

System TRX = SSB, USB

PSKmail is a narrow band mail delivery system used by amateur radio hams via short wave (HF) communication.
To optimize the reception quality, you can switch on a narrow 500 Hz filter into the receiver. Most of the transceiver can be retrofit with a narrow filter into the USBmode control. See manual. The advantage of a narrow filter is, that the area of only 500 Hz is bugged and you can’t be disturbed simultaneously from serveral different signals. Additionally or alternatively, you can use a DSP as long as the recipient provides you.

[http://www.pskmail.eu/images/Bild%203.JPG]

The frequency to set is (dail-frequency) – 1 kHz from the center frequency, e.g.
PSK-APRS-Random 10.148,0 kHz center , dailfrequency 10.147,0 kHz
Dail-frequency, 2,4 kHz USB, 1000 Hz Waterfall
Center Frequency 10.148 kHz USB




3. PSKmail, what does it cost ?

[http://www.pskmail.eu/images/Bild%204.JPG]

The PSLmail software, Linux and Windows are available free of charge. The user only needs the equipment discribed above. For amateurs usually always available. To connect transceiver and notebook, you need a small sound card interface. The cost amounted to 10,00 € to 100,00 €, depending on the equipment.
Small interfaces only transmit the NF and turn the transceiver on.
Complex interfaces control, among other things, the transceiver for a possible server-triggered frequency change.

See www.pskmail.eu > PSKmail-Interface



[http://www.pskmail.eu/images/Bild%205.JPG]


4. Server System

The PSK-APRS-Random-Frequency 10.147,0 kHz dial should be use by all servers, unless there would be multiple servers installed for different frequencies. INTERMAR operates five servers at different frequencies (see frequency-map).
The PSK-APRS-Server is exclusively used for PSK-APRS-Functions. There is no weather,
email or file-retrieval allowed.
Special servers, at 20m, 30m, 40m and 80m, are available for these functions.
Other servers can be connected on the PSC-APRS frequency
Then you suggest a QSY-frequency and get a new QSY-release to the specified frequency.
The user has to change the frequency of his transceiver e.g. to retrieve his mail.

Attention All other functions, WX Email and files on other frequencies
> you can find it on the Frequency-Plan

PSKmail 250 MODE Software INTERMAR PSKmail Win 1.xxxx

*Chart reference note: All other functions, WX, email and files on other frequencies
> You can find it on the frequency plan

PSKmail 250 NODE software INTERMAR PSKmail Win 1.xxx


[http://www.pskmail.eu/images/Bild%206.JPG]

Server 1 10.1047,0 kHz PSK-APRS (Dial QRG) 5/8 Vertikal
Server 2 14.090,0 kHz WX-Email, File „           5/8 Vertikal
Server 3 7047.okHz WX-Email, File „               5/8 Vertikal
Server 4 3.587,0 kHz WX-Email, File „             1/4 Vertikal
Server 5 21097,0 kHz WX,Email,File                5/8 Vertikal
Server 6 28147,0 Khz  Test Server                  1/4 Vertikal

All Qrg DIAL !  ( Center + 1khz up)

Fonte: PSKmail-Info<http://www.pskmail.eu/index.php?PSKmail-Info>


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