====== GB7WIN Crab Wood, Winchester ======

GB7WIN was commissioned on 23rd March 2025 by Alan G8IPG and Jason M0MZF as part of [[https://swhr.org.uk/|South West Hampshire Raynet's]] wider project to provide digital voice and data services to amateurs across the wider area and as a spiritual successor to [[nodes:gb7sou|GB7SOU]]. Thanks to Matt 2E0HKD for his continuing involvement in BPQ node configuration and to all the OARC packet community for helping us along the way.

**Live network map [[https://nodes.ukpacketradio.network/packet-network-map.html?rfonly=1|]]**\\
**Live traffic monitor at [[http://gb7win.ddns.net:50650]]**\\
**Get on WhatsPac :) [[http://whatspac.m0ahn.co.uk:88/]]**

====Location====
<code>
Crab Wood, Winchester, IO91hb
SU 45002 29687
51.064761 , -1.3591662
51°03′53″N , 001°21′33″W
</code>
=====Current and planned ports=====
^ Port ^ Frequency ^ Antenna   ^ NinoTNC Mode    ^ ERP / Dev. ^ Status ^ Neighbors ^ WebSDR ^
|2| 144.9375MHz \\ 12.5KHz FM | V Omni 3dBd 40mAGL  | 0101 QPSK 3k6 IL2P+CRC   | 14dBW 2.4KHz | active | [[nodes:gb7rdg|GB7RDG]] [[nodes:gb7bsk|GB7BSK]] [[nodes:gb7wod|GB7WOD]] [[nodes:gb7bdh|GB7BDH]] | [[http://zepler-websdr.suws.org.uk/|SUWS]] |
|4| 70.4875MHz \\ 12.5KHz FM  | V Omni 0dBd 7mAGL   | - | -   | planned | | |
|6| 50.650MHz \\ 12.5KHz FM  | V Omni 0dBd 40mAGL | 1011 QPSK 2k4 IL2P+CRC    | 13dBW 2.4KHz | active | [[nodes:gb7bdh|GB7BDH]] [[nodes:gb7rdg|GB7RDG]] |[[http://wessex.hopto.org:8070/|Wessex]] |
|7| 432.650MHz \\ 12.5KHz FM  | V 180° 5dBd 7mAGL   | 0011 C4SK 9k6 IL2P+CRC | -   | licensed | [[nodes:gb7sou|GB7SOU?]] | |
=====Coverage Maps=====
Simulations from radiomobileonline; Outstation antenna 12m AGL; Strong signal 15dBuV/m, Weak Signal 3dBuV/m, Path "reliability" 95%

^ 2m plot, 4dBi antenna^ 6m plot, 2.2dBi antenna^
| {{:nodes:2m_crab_wood_45m_25w_erp_base.png?400}} | {{:nodes:6m_crab_wood_45m_25w_erp_base.png?400}} |

=====Technical=====
====Hardware====
  * Modified Comet GP-15N @ ~40m AGL / ~200m ASL, 55m Andrews LDF7-50A, 14dBW ERP
  * Raspberry Pi 5 / Raspberry Pi OS (Debian Bookworm) / 256GB NVMe SSD
  * [[https://www.meanwell-web.com/content/files/pdfs/productPdfs/MW/HRP-100/HRP-100-spec.pdf|Meanwell HRP-100-12 PSU]]
  * GPIO Relays for remote power switching, Dallas 1-wire temperature sensor for radio
  * External 12V switched power & USB for future expansion
  * 2m: Motorola GM380 (data in / flat audio out)
  * 6m: Alinco DR-M06TH [[https://wiki.oarc.uk/radios:dr-m06th|(modulator / discriminator tapped)]]
  * 2x NinoTNC A4 v3.42 firmware
  * [[https://wiki.oarc.uk/cm108_sound_interface_smd|CM108]] on NinoTNC RX audio tap for 1k2 AX.25 decode (Direwolf 1.7)

====LinBPQ====
**Version**
<code>G8BPQ AX25 Packet Switch System Version 6.0.24.69 March 2025 (G8BPQ beta)</code> 

**Last updated**
<code>Fri 2025-04-25 06:44:12 BST</code>

**Global**
<code>
;T3=540                 ; L2 validation timer - increase from default 180 (3min)
;IDLETIME=2700          ; L2 idle link shutdown timer - increase from default 900 (15min)
MINQUAL=50              ; Minimum quality to add nodes to the table
L4COMPRESS=1            ; Enable compression on L4 links
NODESINTERVAL=60        ; Broadcast / expect nodes every 60min
OBSINIT=6               ; Initial OBS counter for an added node
OBSMIN=4                ; Minimum OBS number to select broadcasted nodes
L3TIMETOLIVE=25         ; L3 maximum hops count
L4DELAY=10              ; L4 delayed ACK timer
L4RETRIES=6             ; L4 retry count, default=3, increased to 6
L4TIMEOUT=120           ; L4 Timeout increased to 2min
PACLEN=236              ; Max out NETROM frames
</code>

**Routes**
<code>
ROUTES:
M0MZF-1,192,2
GB7WOD,192,2

; Prioritise RDG on 6m
GB7RDG,192,6
GB7RDG,191,2

; Prioritise BDH on 6m
GB7BDH,192,6
GB7BDH,191,2

;GB7BSK,192,2
;MB7NPW,192,6
***

</code>

**RF Ports**
<code>
PORT
  PORTNUM=2
  ID=144.9375MHz/Nino-0101/QPSK/3k6
  M0LTEMapInfo=RF,144.9375,QPSK,3600,3600,Mixed
  TYPE=ASYNC
  PROTOCOL=KISS
  KISSOPTIONS=ACKMODE
  COMPORT=/dev/tnc-2m
  SPEED=57600
  TXDELAY=100            ;msec, Seems OK for a relay-switched 857d
  TXTAIL=1               ;msec, Needed to prevent NinoTNC sending 30msec tail
  FRACK=7000             ;msec, Busy channel, 7sec ACK timeout
  PACLEN=236             ;bytes, 236 is max for a NETROM frame
  MAXFRAME=4             ;no., Default frames before ACK
  RESPTIME=600           ;msec, Delay time before L2 ACK (256*8)/3600=568
  SLOTTIME=100           ;msec, Wait time before checking PERSIST again
  PERSIST=255            ;255/(# hidden stations on link - 1) but we can hear everyone
  DIGIFLAG=0             ;Don't digipeat (=1 all, =255 UI only)
  QUALITY=10             ;Nodes heard on this port get this quality
  MINQUAL=50             ;Therefore do not broadcast nodes heard on this port
  NODESPACLEN=160        ;Keep NODES broadcast shorter to help decode
;  QUALADJUST=100        ; % by which to reduce quality if the best neighbor is on the same port, needs tuning
  NONORMALIZE=1          ;Disable node quality normalisation algorithm
  IGNOREUNLOCKEDROUTES=1 ;Locked routes only
ENDPORT

PORT
  PORTNUM=6
  ID=50.650MHz/Nino-1011/BPSK/2k4
  M0LTEMapInfo=RF,50.650,QPSK,2400,2400,Backbone
  TYPE=ASYNC
  PROTOCOL=KISS
  KISSOPTIONS=ACKMODE
  COMPORT=/dev/tnc-6m
  SPEED=57600
  TXDELAY=180            ;msec, DR-M06 takes ~150msec to key up
  TXTAIL=1               ;msec, Needed to prevent NinoTNC sending 30msec tail
  FRACK=4000             ;msec, Needs tuning
  PACLEN=160             ;bytes, 236 is max for a NETROM frame
  MAXFRAME=4             ;Default no. frames before ACK
  RESPTIME=900           ;msec, Delay time before L2 ACK (256*8)/2400=853
  SLOTTIME=100           ;msec, Wait time before checking PERSIST again
  PERSIST=255            ;255/(# hidden stations on link - 1) - but we can hear everyone
  DIGIFLAG=0             ;Don't digipeat (=1 all, =255 UI only)
  QUALITY=10             ;Nodes heard on this port get this quality
  MINQUAL=50             ;Therefore do not broadcast nodes heard on this port
  NODESPACLEN=160        ;Keep NODES broadcast shorter to help decode
;  QUALADJUST=100         ; % by which to reduce quality if the best neighbor is on the same port, needs tuning
  NONORMALIZE=1          ;Disable node quality normalisation algorithm
  IGNOREUNLOCKEDROUTES=1 ;Locked routes only
ENDPORT
</code>
----
=====The Great South East INP3 Experiment=====
Testing INP3 in the local area; GB7BDH, M1BFP, GB7BSK, MB7NPW, GB7RDG, GB7WIN\\
Maybe GB7WOD? GB7WOK? GB7BRK? G7BCS?

MAXRTT=90 seems a bit high?\\
MAXHOPS=5 is probably a minimum?\\

Plan is to document this "better" over on the OARC Wiki but for posterity...

From discussion on Discord:\\
  * BPQ uses MAXRTT, round trip time
  * BPQ sends full nodes table only when a neighbour first appears 
  * BPQ sends RTT probes every 4 minutes and accumulates RTT from these
  * BPQ does not use obsolescence counter, just propagates routes if they change
  * BPQ sends a node drop immediately
  * BPQ intends to replace NODES broadcasts with INP3, so to peer to neighbour a route must be defined in ROUTES:
  * XRouter requires a NODES broadcast to decide a peer is a router, then sends an L3RTT frame and if a response is heard then sends INP3 nodes at L4
  * XRouter uses MAXTT (one way) instead of MAXRTT
  * XRouter sends full nodes table at L4 10 minutes & when INP3 node appears
  * XRouter constantly updates TT from RX'd packets, SMOOTHED TT
  * XRouter sends L3RTT at L3 to neighbours every 5min to measure RTT
  * XRouter uses the existing(?) OBSCNT to drop old routes
  * XRouter resets OBSCNT after receiving a NODES table from neighbour
  * XRouter sends a node drop immediately
====LinBPQ====
**Version**
<code>G8BPQ AX25 Packet Switch System Version 6.0.24.69 March 2025 (G8BPQ beta)</code> 

**Last updated**
<code>Mon 2025-04-121 22:16:14 BST</code>

**Global**
<code>
;T3=540                 ; L2 validation timer - increase from default 180 (3min)
;IDLETIME=2700          ; L2 idle link shutdown timer - increase from default 900 (15min)
MINQUAL=50              ; Minimum quality to add nodes to the table
L4COMPRESS=1            ; Enable compression on L4 links
NODESINTERVAL=60        ; Broadcast / expect nodes every 60min
OBSINIT=6               ; Initial OBS counter for an added node
OBSMIN=4                ; Minimum OBS number to select broadcasted nodes
L3TIMETOLIVE=25         ; L3 maximum hops count
L4DELAY=10              ; L4 delayed ACK timer
L4RETRIES=6             ; L4 retry count, default=3, increased to 6
L4TIMEOUT=120           ; L4 Timeout increased to 2min
PACLEN=236              ; Max out NETROM frames
</code>

**Routes**
<code>
ROUTES:				; Locked routes (31 maximum)
; CALLSIGN,QUALITY,PORT[,MAXFRAME,FRACK,PACLEN,INP3Flag]
GB7BDH,1,2,8,7000,236,1         ;Good to BDH on 2, intermittent on 6
GB7BDH,1,6,2,4000,160,1         ;Keep PACLEN lower on 6m

GB7RDG,1,2,8,7000,236,1         ;Good to RDG on 2, intermittent on 6
GB7RDG,1,6,2,4000,160,1         ;Keep PACLEN lower on 6

GB7BSK,1,2,8,7000,236,1         ;Good-ish to BSK on 2
MB7NPW,1,2,8,4000,120,1         ;Intermittent to NPW on 2, PACLEN low, try it out?

M0MZF-1,1,2,8,7000,236,1        ;Good paths to Sysops
G8IPG-1,1,2,8,7000,236,1         
***
</code>

**RF Ports**
<code>
PORT
  PORTNUM=2
  ID=144.9375MHz/Nino-0101/QPSK/3k6
  M0LTEMapInfo=RF,144.9375,QPSK,3600,3600,Mixed
  TYPE=ASYNC
  PROTOCOL=KISS
  KISSOPTIONS=ACKMODE
  COMPORT=/dev/tnc-2m
  SPEED=57600
  TXDELAY=100            ;msec, Seems OK for a relay-switched 857d
  TXTAIL=1               ;msec, Needed to prevent NinoTNC sending 30msec tail
  FRACK=7000             ;msec, Busy channel, 7sec ACK timeout
  PACLEN=236             ;bytes, 236 is max for a NETROM frame
  MAXFRAME=4             ;no., Default frames before ACK
  RESPTIME=600           ;msec, Delay time before L2 ACK (256*8)/3600=568
  SLOTTIME=100           ;msec, Wait time before checking PERSIST again
  PERSIST=51             ;255/(# hidden stations on link - 1) but we can hear everyone
  DIGIFLAG=0             ;Don't digipeat (=1 all, =255 UI only)

;INP3 tunables
  IGNOREUNLOCKEDROUTES=0 ;Peer to all
  QUALITY=0              ;Disable quality based routing
  INP3ONLY=1             ;Enable INP3 Only
  MAXRTT=90              ;sec, Max RTT to add INP3 node
  MAXHOPS=5              ;num, Max distance to other INP3 node
ENDPORT

PORT
  PORTNUM=6
  ID=50.650MHz/Nino-1011/BPSK/2k4
  M0LTEMapInfo=RF,50.650,QPSK,2400,2400,Backbone
  TYPE=ASYNC
  PROTOCOL=KISS
  KISSOPTIONS=ACKMODE
  COMPORT=/dev/tnc-6m
  SPEED=57600
  TXDELAY=180            ;msec, DR-M06 takes ~150msec to key up
  TXTAIL=1               ;msec, Needed to prevent NinoTNC sending 30msec tail
  FRACK=4000             ;msec, Needs tuning
  PACLEN=160             ;bytes, 236 is max for a NETROM frame
  MAXFRAME=4             ;Default no. frames before ACK
  RESPTIME=900           ;msec, Delay time before L2 ACK (256*8)/2400=853
  SLOTTIME=100           ;msec, Wait time before checking PERSIST again
  PERSIST=255            ;255/(# hidden stations on link - 1) - but we can hear everyone
  DIGIFLAG=0             ;Don't digipeat (=1 all, =255 UI only)

;INP3 tunables
  IGNOREUNLOCKEDROUTES=0 ;Peer to all
  QUALITY=0              ;Disable quality based routing
  INP3ONLY=1             ;Enable INP3 Only
  MAXRTT=90              ;sec, Max RTT to add INP3 node
  MAXHOPS=5              ;num, Max distance to other INP3 node
ENDPORT
</code>


=====Other FAC'd equipment on site=====
  * MB7UUW [[https://aprs.fi/info/a/MB7UUW|APRS Digipeater]], 144.800 MHz
  * GB7CW DMR Repeater, [[http://thesouthwestcluster.co.uk/|South West Cluster]], DVU48 439.600 MHz -9MHz, CC5, Slot 1 TG 9 Local, Slot 2 TG 950 Cluster