November 2003
We started to receive reports that the repeater
was not operating correctly from MB7UJ's users.
On investigation it was discovered that the 12V
mains PSU had become intermittent. A spare PSU
was put into service. When re-installing the digipeater
it was discovered that the Diamond F23 colinear aerial had
developed poor VSWR. It was replaced with a PROCOMM
3dBd gain colinear 'obtained' (chucked out!) by G4KWT's
employer.
August 2009
The 12V PSU again failed and so was replaced - by the original PSU which had been repaired and thoroughly soak tested. Recycling at its best!
December 2009
In mid December MB7UJ again became intermittent. This was a strange one. It appeared to be receiving OK but it's transmitted signal was only getting as far as Mac's (G4IQI) QTH in Bracknell!
Mac retrieved the hardware from the site and it
was thoroughly tested by Denis (G4KWT). We even went as
far as cooling it down to freezer temperature to see
if the recent weather conditions were to blame.
The hardware was soak tested for several weeks
at G4KWT's QTH and no fault could be found. On re-visiting the site it was discovered that
the PROCOMM aerial/feeder had developed very high VSWR.
The old team - G4IQI, G4KWT and G7RUH (assisted by Rob G7GHA)
got back together again to go up to the site and sort
out the problem. The coax feeder was found to be OK
but the PROCOMM aerial had gone high VSWR. Fortunately
we had a spare (from the same source as the original
one and which had been in storage at G4KWT's QTH since 2003).
This was installed and the repeater put back to full working order.