Featured post

GB3WE VHF Repeater now an MMDVM Repeater

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GB3WE_MMDVM GB3WE_MMDVM
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GB3WE VHF Repeater is now an MMDVM Repeater!

You can now use your DMR, D-Star or fusion radio on GB3WE on 145.6875MHz using a -600KHz shift.
GB3WE now offers the same facilities as our 70cm MMDVM repeater GB7WB on 439.4875MHz which has a -9MHz shift.

When using D-Star don’t forget to program GB3WE C and GB3WE G and to use your DTMF keypad to connect to which ever reflector you wish to use. Enter *1C to connect GB3WE to REF001C for example.

If you use a DMR radio, then use TimeSlot 2 TalkGroup 9 ColourCode 2 to talk on the Brandmeister Network.

When using your fusion radio you don’t need any settings, making this the easiest mode to use of them all!

Featured post

UHF PA Temperatures

Title: UHF PA Temperatures

The temperature graph and dials which you see above were generated using a tiny Arduino Mega micro-controller board with an even smaller ethernet board plugged into it. The thermistors built into our massive UHF Motorola PA’s are read via the Arduino’s many analogue inputs, then the numbers obtained are sent to a phant server in the cloud and finally Google charts are used to plot the results!
We find it useful and interesting when we are not drinking Budweiser! :)

Featured post

GB3WB Weather Station

Title: GB3WB Weather Station

We have fitted a new weather station at the repeater site, have a look at its own page here:

http://gb3wb.com/weather/

If you cannot see the weather station displayed above and you are using an iPhone or iPad then download the browser called ‘Photon Browser’ from the app store as this will allow you to view flash on all web sites!

In the photos you can see two of our miniature cyclone windows 10 PC’s.
One runs the weather station and one runs our fusion Wires-X system for GB7IS.
These really are very tiny PC’s!

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Featured post
MMDVM GB7WB

Another First In The South West: MMDVM on GB7WB

Another First In The South West UK: MMDVM on GB7WB.

GB7WB is now a multi-mode UHF digital repeater, which is another milestone for the group.

It will be interesting to see which local repeater groups follow our lead with MMDVM!  Imitation is always a great form of flattery :)

We are using a brand new Yaesu DR-1X repeater with an MMDVM KI6ZUM board and TCXO on an Arduino Due plugged into the rear 15w HD connector of the DR-1X. The software is run on a Cyclone miniature Windows 10 PC.

You can now operate through GB7WB on 439.4875 MHz with a -9 MHz shift using D-Star, DMR or fusion.

On DMR use timeslot 2, talkgroup 9 and colour-code 1. This repeater is connected to the brandmeister network.

Use the same settings as before on D-Star and you can connect to REF001C or any of your favourite reflectors.

Use your DTMF keypad, press *1C and you will connect to REF001C

GB7WB will no longer auto connect to REF001C so you need to press these DTMF digits each time that you want to use D-Star on REF001C.

When using fusion, you are connected to reflector 4420, which is also accessible via the Brandmeister DMR Network

Weston repeater group Weston repeater group
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GB3WB Pond


GB3WB Badgers


Weston repeater group

If Budweiser made repeater sites this is what they would look like!

If Budweiser made repeater sites this is what they would look like!

This is the Weston repeater groups cabinet July 2016, only one of the Yaesu repeaters is being used for fusion! One is FM only and two are used for MMDVM:

Decibel Products 4 channel hybrid combiner

A Decibel Products 4 channel hybrid combiner is now used to combine all 4 of our UHF repeaters transmitters so only a single antenna is required!

This is a very expensive piece of equipment which we had to import from the USA.

It was well worth the expense as it works so well.

Decibel Products Hybrid Combiner Decibel Products Hybrid Combiner
Decibel Products Hybrid Combiner Decibel Products Hybrid Combiner
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Decibel Products Hybrid Combiner Decibel Products Hybrid Combiner
Decibel Products Hybrid Combiner Decibel Products Hybrid Combiner
Decibel Products Hybrid Combiner Decibel Products Hybrid Combiner
Decibel Products Hybrid Combiner Decibel Products Hybrid Combiner
Decibel Products Hybrid Combiner Decibel Products Hybrid Combiner
Decibel Products Hybrid Combiner Decibel Products Hybrid Combiner

 

 

Motorola MSF5000 TLE2522 UHF Amplifiers now used on our repeaters

Motorola MSF5000 TLE2522 UHF Amplifiers are now used on our repeaters, because of the massive losses in our 4 channel Decibel Products hybrid combiner which we use to allow all of our 4 UHF repeater to use the same antenna.

In total our Decibel Products hybrid combiner and two TX notch filters put about 10dB of loss into our transmit path.

To get 1w out we need to run 10w and to get 10w out we need to run 100w!

That is why we need big reliable amplifiers which require only 3w of drive to produce 100w.
All of our repeaters have been reprogrammed to run only 3w now which means their PA’s are just ticking over and not even getting warm!

We have also fitted Big 50 Amp ACS758 current sensors to our amplifiers so that our Arduino Mega web server can measure and display the amplifiers performance on a web page.

We have also attached a 7 segment voltmeter display to the green wire in the 6w molex socket so we can see the TX output power forward voltage. This forward voltage is around 8.8v  when the PA is running 100w.
The red wire in the socket is connected to a 100k thermistor mounted on the heatsink to allow you to measure the PA’s temperature. Measure between the red wire and the black wire which is ground.
The brown wire is connected to the 100k thermistor mounted on the dummy load of the circulator.

 

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Owl February 2016

 

GB3WE 5 GHz Dish & 2.4 GHz Tonna

Join our Yahoo Group today!

Keep up to date and fully informed by joining our Yahoo Group: it-is-wb-we-subscribe@yahoogroups.co.uk

https://uk.groups.yahoo.com/neo/groups/IT-IS-WB-WE/info

 

The only place to find out what is going on with our repeaters is at our Yahoo Group: ‘IT-IS-WB-WE’ so do join today and don’t miss all of the latest news!

 

 

GB7IS_GB7IT_Repeaters

GB3WE Repeater Group Supporters

Latest supporters: July 9 2016

M6LSJ Lionel
MW0KEQ Kevin
G6AHX Simon
GW8WZR Dave
2W0CGM Nigel
M6DZT John
G8KOE Martin
2E0SST Steve
M0FXB Andreas
M6SEK Andre
G4SUH Paul
G0CCB Clive
M0WDX Huw
G6YEK Des
2E0HOQ Neil
G0LHX Harry
G0ELO John
2E0ZDJ Louis
M6OAS Les
M3ZJK Simon
MW0PRP Peter
M6ZSY Missy
M6MGE Mike
2E0JUW Adrian
M0LJT Eddie
G6XNQ Bob
G3XED Cyril
M0NGO Bryan
G0OGO Trevor
M0JCE Julian
M6SXP Steve
M0VLN Mike
M6CTZ Jack
M6ORO Olive
M6SEO Andy
M6JXY John
G4KMB Tony
G3TJE Peter
G4OKO Dave
G7VEQ Rob
M6TNF Toni
G7HYS Derek
G8SPC Bob
2E0JQF Steve
2E0RHV Bob
G8WAL Paul
G3SDH Paul
G1VSX Graham
G4TBD Steve
G6IZI Andy

GB3WE Arduino Project

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