GB7IV
Welcome to the information pages of GB7IV
D-Star Repeater located in Chandlers Ford
Please note GB7IV is not funded by the South Hampshire Repeater Group.
But our members do provide engineering support to this project
& work closely to improve coverage of the repeater.

Prediction mobile coverage from new site Thornhill early in 2017
Antenna picturer of the IV aerial located SMC Chandlers Ford

Its a triband Colinear for 2m 6m & 70cm aerial height ASL: circa 60ft AGL

Also you can see on the pole: 40m & 80m Meter trap Dipole, and modified Log Periodic TV Aerial for FM band listening, doing long term weather survival tests.

GB7IV
GB 7 IV is a 2 Meter D-Star Repeater operating on 145.775MHz, currently in Chandlers Ford, Eastleigh, Hampshire.

GB 7 IV is funded by Ebay sales and donations from its users, The RF engineering work is undertaken by SHRG members, while The D-Star lad's concern themselves with the Internet side of things.

Currently located at SMC, which is in an RF hole to the West of Eastleigh in Central Hampshire, it has not yet achieved interconnection with the rest of the world, and is thus is still a stand-alone D-star unit, Our Lad's have been working on the hardware, and software to achieve this aim, which included scrounging a suitable computer, and running Suitable software, and arranging connection to the Internet.

We hope to achieve the Internet connectivity Early in the new year. (2017)

GB7 IV uses :
D Star repeater ID RP200V ERP of around 20Watts from the aerial

controller ID RP2C

Computer :

Running operating system :

PSU SMC FP 15 ( badged Yaesu unit )

Duplexers Wavecomm on loan from GB 3 SH

Rack generic 19"

Feeder RG 213

Mast 2" thickwall 20ft Aluminum mast

Aerial 6, 2 & 70cm Triband colinear

Battery back up not yet fitted

GB7 IV NEWS

NEW SITE FOR SPRING 2018
We are in the process of getting GB 7 IV moved to the Thornhill area of Southampton, this will give much improved coverage for base stations, mobiles and hand held stations, as this is a commercial site we will change over to a commercial grade monoband Marine White Fiberglass aerial from Procom: CXL 2 -1LW/l, this ground plane-less aerial, is just 1110mm long with 0dbd gain, and has a high wind speed specification and survival.

FEBRUARY 2017 UPDATE

In preparation of Moving GB7 IV, work is progressing on its rack, the monitoring equipment, together with progressing its connection to the world wide D Star network.

The Cat 5 Cable has been pulled through, and connected to the computer which has been programmed up with the Centros operating system, we now await work at SMC to allow traffic, then it will be down to the D star lads to make the final connection to the D star network.

A back up 32AH battery has been fitted to get GB 7 IV over browns out and short black outs which are fairly common in
Chandlers Ford.

However the Computer, which is needed for Linking, will only have an UPS to power it down in the event of a 20 minute or longer power cut.

The D Star Icom Repeater surprisingly lacks any Meters or LEDS to tell us what its doing, so a 19" 3U rack unit has been built with the purpose of monitoring PSU / Battery Volts and Current drawn, thus showing its is receiving / idle or transmitting!

Monitoring of battery charge current and voltage, the photos show the Voltage Monitoring Fitted, however we await the Battery monitoring meter, which is on its way from China, as its 1/3 of the price of UK supplied models!

 

The map below is from RSGB Repeater Site from its QTH Chandlers Ford

The famous Chandlers Ford crows like the aerials too

work in progress the shinny 3 U front will be fitted with meters to the inverted shelf section above it..


GB 3 SH Duplexers on loan


Monitoring of battery charge current and voltage, the photos show the Voltage Monitoring Fitted, however we await the Battery monitoring meter, which is on its way.

Sunrise from GB7IV in timelapse video 18 10/17 CLICK HERE Video From David Barrett Filmed 20ft below the aerial
Battery lurking rear of rack, note fuses on both 13V & 0V cables