Antenna picturer of the IV aerial located SMC Chandlers Ford
Its a triband Colinear for 2m 6m & 70cm aerial height ASL: circa 60ft AGL
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)
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
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
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!
work in progress the shinny 3 U front will be fitted with meters to the inverted shelf section above it..
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