EYRG.net

East Yorkshire Repeater Group, a radio amateur group dedicated to providing repeater services including training to the East Yorkshire Region.

Jul
22
The D-Plus system is now fully working giving access to all other Internet linked D-Star repeaters around the world.

There was some difficulty with accessing the D-Star controller at Weedley from the gateway PC at my QTH in Anlaby that was traced to a problem with the 5.745GHz WLAN head unit. It was fixed with a firmware upgrade.

The Weedley end already had the firmware upgrade installed but the Anlaby end had been replaced (see earlier post) with a head unit that had not been updated.

Thanks are due to Darren Storer G7LWT who checked the bits of the system I can't see remotely from his QTH in Manchester.

73 de Clive G3GJA / G8EQZ
Jul
19
GB7HU Joins the Worldwide D-Star Network!

After working into the small hours, Darren Storer (G7LWT) of the UK Interconnect Team has installed the Icom Gateway Software onto our Gateway PC. The system has been approved by the Trust Server Team in the US and our D-Star Repeater GB7HU has joined the Worldwide D-Star Network. The D-Plus system which allows the system to link into other D-Star Repeaters and Reflectors worldwide is currently being installed, and should be operational by the time you read this thread...

I will be creating the training material and the .ICF files for the Icom IC-E92D handheld and Icom IC-E2820 mobile over the next few days to enable everyone use the system to its full potential. 

Thanks go to Darren G7LWT for configuring the system in record time, and to Clive G3GJA for putting the wireless infrastructure in place to allow GB7HU to use his Internet connection from Anlaby at no additional cost to the group - something which is becoming an issue to the many D-Star repeaters around the UK.

73 de Andy


Jul
12
The Group purchased two pairs of EnGenius EOC-5611P wireless bridging units after it was found that some loaned units were unsuitable for getting an Internet link to the site. The EnGenius units were supplied by local wireless LAN specialist Solwise Ltd. As detailed in an earlier post, one of the units was fitted to the EYRG tower on the 27th June.

WLAN unit

Prior to this I had been busy refurbishing my home telescopic mast and rotator system so that I could use it to mount the other end of the wireless LAN link. It had been out of use for several years and needed replacement of the stub mast, bearings stripping down, cleaning and re-greasing etc. After reassembling the mast, attaching the bridging unit and cranking it up to the full height of 14m the CAT 5 cable was plugged into the laptop and ... nothing!! Not even a trace of the Weedley end of the link

There were some weak 5GHz signals from and adjacent mast at Weedley used by the wireless broadband company Quickline so I knew that my end was working OK and because the unit is on the rotatable part of the mast I knew I'd got the 290deg heading correct. Over the next week I tried linking to Weedley from a couple of locations where I could park my car and see the Weedley towers using one of the spare units and was succesful.

On Sunday 3rd July I decided to look at the Weedley end from the ground and re-checked the reciprocal bearing of 110deg. Although not very accurate as I was sighting the angle from the ground, the bearing the antenna was pointing as measured on my compass looked more like 150deg. A call to Richard YTV and Lyndon resulted in a rapidly convened working party at 4pm. We lowered the mast, luffed it repositioned the bridging unit and raised it again within two hours.
...
Jul
10
News from the "dstarsoftware" yahoo group is a new version of DV Node for Windows has been released...

The DV Node for Windows (WinDV) allows you to create a D-Star hotspot using either the DV Node Adapter board or the DV Access Point Dongle. It is aimed at replacing both the DVAR Hotspot program written by Mark McGregor KB9KHM (http://w9arp.com/hotspot/), and the DVAP Tool software supplied with the DV Access Point dongle...

Configuration was very easy as can be seen - just download the executable from the Dutch Star website (https://www.dutch-star.eu/index.aspx) and it's up and running.

The software can connect to the D-STAR network using either the Dplus (used on the Reflectors, by the Icom repeater gateways, the DV Dongle and many DVAR HotSpot nodes) as well as the DExtra protocol and the XReflector systems - some further reading required!

There is support for the ircDDB network which speeds up the updating of the D-Star Database and also the ability to forward GPS position reports (from both the Node as well as from any RF users) onto the APRS network through the built-in APRS-IS module.

Who knows what's around the corner - perhaps a replacement for the Icom Gateway software running under Windows?

73 de Andy
Jun
27
On the 26th June, which was probably the hottest day of the year to date, a working party from the East Yorkshire Repeater Group visited our site at Weedley to install the 5GHz wireless antenna on the mast...

The easy part is lowering the mast on the electrically operating winch, the hard work is luffing tower to gain access to the aerials at the top - the whole process taking about an hour. This provides an opportunity to do some of the less technical tasks, systemic weed killer applied liberally to the remaining vegetation!

DSC03194t.jpg

Why does the autofocus concentrate on the leaf in the foreground and not the intended subject?

A couple of jubilee clips and some outdoor Cat 6 cable and the whole lot has to go up again...

DSC03196t.jpg

Where have all the helpers gone ? To do the more technical work of configuring and testing the wireless link on site in preparation for installing the other end with the Internet...

DSC03198t.jpg

The East Yorkshire Repeater Group welcomes all willing volunteers, especially on maintenance days when there are numerous tasks: Applying grease to the tower's cables (which invariably ends up on one's best t-shirt), antennas to check, fences to paint, etc. However this does provide a rare change to learn a little more about how repeaters actually work!
Jun
17
RadCom Preview (July 2011).
Jun
09
Following discussions at the last East Yorkshire Repeater Group committee meeting, we agreed to apply for a club callsign to be used for our training and emergency communications role. We were fortunate enough to have been granted the callsign M0GYR - whilst this was not our first, second or even third choice, it does represent what the group provides...



This isn't officially our new logo - it's just one I've drawn up to get us away from the one we "borrowed" many years ago from our the local council!

Andy G0VRM
Jun
01
A common criticism of 70cms D-Star repeaters is that the input can be somewhat "deaf". This ofter results in a situation where you cannot always access it even though you can hear it on your radio - this is more apparent when using a hand held with low power and inefficient aerials.

The standard fix for this is to retrofit a 70cms preamplifier and a simple filter inside the ID-RP-4000V band module - the one recommended by the RSGB ETCC is the Kuhne Electronic MKU LNA 432 A is retrofitted inside most systems. In our case, this task is not easy with the output being only 1.6MHz away instead of the usual 9MHz and significantly more filtering is required.

For those interested in the details of the preamplifier - the specification is shown below...
Kuhne Spec 002.jpg
May
26
The RSGB is giving its membership the opportunity to buy, at a substantial discount from the retail price, one of the top choices in towers for amateur radio use—the LUSO 36EU Tower.
It is no coincidence that most of the world’s top DX stations have their antennas atop impressive towers. When it comes to the best transmitting and receiving equipment, all amateurs know that there is no substitute for getting your aerials as high and clear as possible. And there are few better ways than with a purpose-designed, heavy-duty tower such as the LUSO 36EU. With a maximum head load of 150kg the tower will accept 50sq ft of antenna with ease.
The LUSO 36EU self-supporting tower is a surprisingly compact 12.5m (41ft) when fully retracted. One press of the remote control ‘raise’ button engages the fully automatic motor control system. In less than a minute and a half the tower erects to its magnificent full height, 36m—that’s 118 feet. One of the traditional issues with towers is antenna assembly and maintenance. With the tower in the lowered position the LUSO 36EU solves this beautifully with its built-in platform to work on your antenna. No more dangerous ladders or hiring cherry pickers!
This tower is not for the faint-hearted! Once you have planning permission the installation is straightforward, requiring a suitable concrete foundation and site access for a mobile crane. The purchase package includes the services of two of the Japanese manufacturer’s technicians on-site during the installation. Once erected, the Luso 36EU tower will provide a superb support for the most elaborate of antenna systems—and easy access for maintenance.
The tower has been stored since it was originally purchased by RSGB for use at the Bletchley Park National Radio Centre.
It is now unfortunately clear that heritage conservation and planning issues make it unsuitable for that location. The RSGB is therefore giving its members...
May
23
Thanks go to Sam Hunt who has donated some ex. Met. Police UHF cavities that will allow the use of a state of the art pre-amp on the receiver of the D-Star repeater. These are quite large for 70cm and are well built.

The cavities need a some new coupling loops to make them usable. 40mm brass washers with 16mm holes were sourced by G0VRM and they were then fitted with a N socket, a hairpin of 1.25mm dia silver plated wire and a 1-10pF micrwave trimmer.

Although not optimized, the results from the first one completed look encouraging. With a 1.6MHz spacing, a notch of -37dB with an insertion loss of 0.8dB has been obtained and that according to www.repeaterbuilder.com is about as good as it gets.

We have enough cavities available to enable single antenna working and with that in mind a much better quality 70cm antenna is being sourced.