GB7WIN Winchester, Hampshire IO91hb

GB7WIN was commissioned on 23rd March 2025 as a joint project between Alan G8IPG and Jason M0MZF on the radio site at Crab Wood, Winchester as part of South West Hampshire Raynet's wider project to provide wide-ranging digital services to amateurs across the wider area. A special thanks goes to Matt 2E0HKD for his continuing involvement in BPQ node configuration!

Live traffic monitor at http://gb7win.ddns.net:50650

Current and planned ports

Freq.	Pol	Mode	NinoTNC mode	Status
144.9375 MHz	V	NinoTNC QPSK 3k6 IL2P+CRC	0101	active
50.650 MHz	V	NinoTNC GFSK 4k8 IL2P+CRC	0100	planned
70.4875 MHz	V	NinoTNC GFSK 4k8 IL2P+CRC	0100	considered; possible link to GB7EBN
432.650 MHz	V	NinoTNC GFSK 9k6 IL2P+CRC	0010	considered; possible link to GB7IOW / GBCS

As far as possible we hope to use the forthcoming 6m port for linking and the 2m port for user access; with only the 2m port currently operational locked NETROM routes have been implemented to the following nodes with which we have a (mostly!) reliable circuit: GB7RDG (Reading, Berks), GB7BSK (Basingstoke, Hants), GB7WOD (Woodley, Berks) and MB7NPW (Pewsey, Wilts).

Technical

Modified Comet GP-15N @ ~40m AGL / ~200m ASL, 55m Andrews LDF7-50A, 14dBW ERP
Raspberry Pi 5 / Raspberry Pi OS (Debian Bookworm)
LinBPQ (latest from Hibby's repo)
NinoTNC A4
Motorola GM380 (data in / flat audio out)

Coverage Maps

Simulations from radiomobileonline; Base antenna 12m AGL; Strong signal 15dBuV/m, Weak Signal 3dBuV/m

2m plot, 4dBi antenna, 12m AGL	6m plot, 2.2dBi antenna, 12m AGL