Tower and Cable Service 12 June 2017

Members of the King’s Lynn Amateur Radio Club worked on servicing the tower and the coaxial cabling on the morning of the 12th June.  The site was tidied up and the tower wound down. The wire cabling on the winch was checked for integrity and serviced.  The coax was also re clipped to the mast and secured to the catenary support.  This will hopefully stop some of the issues encountered during windy weather where there was noticeable crackling on signals where the cable was blowing around.

The matching on the cabling was also checked and both TX and RX aerials  had a good match.

The tower also hosts a standby dual band aerial for Raynet use and this has subsequently been checked and matching is good for 2m and 70 cm.

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Updated firmware 22/23 Feb2017

The repeater was off air for just under a  day whilst the Yaesu Repeater unit was returned to the supplier for a firmware update.  This should solve the issue of the through audio being inhibited when the transmission is started whilst the CWID is happening.  The update also allows the squelch hysteresis to be adjusted which should help with receiving weak stations and avoid the rather sudden drop off of signals.

Updated battery charging 28Nov2015

Various odd effects were being experienced on receive with echo’s and noises present. Following a site visit checks were made and no obvious faults found on the receive or transmit side.

The system was temporarily ran on battery only power and the issues went.  It appears the battery charger was generating these spurious noises.  A replacement power supply was installed which now float charges the battery.  To date the problems have not re-occurred.