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====== GB7BSK Packet Node - Basingstoke, Hampshire ======

**[[https://nodes.ukpacketradio.network/packet-network-map.html?rfonly=1|See live packet connectivity map]]**

Sysop: 2E0HKD\\
Locator: IO91kg

2m 144.950 MHz FM - 1200 baud QPSK (2400 bps), 2.4 kHz wide - NET/ROM enabled\\
NinoTNC setting: 1011

You can only connect to this node via RF.

Good link to [[nodes:gb7rdg|GB7RDG]].

BBS/Mail, and Chat available. SSID for direct connection to BBS GB7BSK-1, and for chat GB7BSK-4.

Forwarding enabled for bulletins to:
  * **OARC** - For the [[https://www.oarc.uk/|Online Amateur Radio Club (OARC)]] community
  * **GBR** - Great Britain wide
  * **WW** - World wide

Rejects bulls @WW over 5000 bytes from external BBSes to avoid saturating onward HF links within the network, please keep bulls a sensible length as you never know what links they may need to traverse!

You may have seen the node appear on APRS maps, but you cannot currently contact it via APRS. At the moment, it only beacons via APRS-IS to raise visibility. In the future, proper RF APRS may become available.

===== QtSoundModem Settings =====

If using [[https://www.cantab.net/users/john.wiseman/Documents/QtSoundModem.html|QtSoundModem]] as a modem, you should select "QPSK V26A 2400bps" and a centre frequency of 1500 hz.

{{:nodes:qtsm-gb7bsk-2m.jpg|}}

And in the modem settings (Settings -> Setup Modems) enable FX25 and IL2P for RX+TX, and tick the CRC box.

{{:nodes:qtsm-gb7bsk-2m-modems.jpg|}}

===== AX.25 2.2 with SREJ =====

It is also possible to connect using Ax.25 2.2, which may have some advantages described below.

To do this from a BPQ node, use the "nc" (new connect) command, rather than the more common "c" (or "connect") command, and force L2 (no NET/ROM) by putting an exclamation mark in front of the callsign. E.g.:

''nc 2 !gb7bsk''\\
(The 2 in this example specifies the port, use the "ports" command on a node to work out which one is on the appropriate band).

One advantage of this type of connection is the ability for SREJ, or selective reject, to be used. Normally, several packet may be sent out in order, and if one of them is not received correctly the entire batch is rejected with a REJ message. The whole set of packets then has to be retransmitted. SREJ allows only specific packets to be rejected, so only those individual packet need to be retransmitted.

===== Technical =====
  * LinBPQ
  * Raspberry Pi 1 model B
  * Tait T2010-321-F00
  * NinoTNC
  * 2m Dipole (vertical)

A 4m port will soon be added, mainly for backhaul connections to other nodes, but users are welcome to use it if it is not too busy. When this is complete, the 2m port may switch to a legacy 1200 mode, but this has not yet been decided.

Long term goal of adding QO-100.