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Maintenance occuring at the

La Villette radiotelescope F6KVP

A number of maintenance operations have recently been performed or are still to be achieved on the radiotelescope :

The branches of the trees invading the antenna plateform, as seen on the pictures, have been cut in order to free the space around the antenna and let it move freely in any directions !

p1020065

An electric 230V power cable and Ethernet cable have been routed underground from nearby red building Folie N4 to the radiotelescope.

 

 

 

The thirty years old coaxial cables have been replaced by a new low loss cable !

 

We first inserted a preamplifier and a pass-band filter into coaxial pathway located in radio rack on antenna plateform.

A second preamplifier has more recently been inserted just after the first one for additionnal amplification together with a second pass band filter to reduce interferences.

Deuxième_preampli

 

Some important work must be performed on the antenna motorisation for it has been damaged by accumulation of rust on the gears.

The radiotelescope is remotely driven by astronomy client software in order to aim it at a target form which we want to record radio signal. Two applications are generally used  : Stellarium et Cartes du Ciel (Skychart). We are developing a driver that connects client application and interface board that controls the antenna motors.

Interface had been designed by KK6MK and F1EHN. However it was not well adapted to drive our radiotelescope. This is why Patrick F1EBK and Alain F1CJN have designed a new interface board using an Arduino micro controler and with much more control possibilities.

Future board prototype is ready for PCB realization. It is fully compatible with former interface board both for connector and software remote control.

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