Repeater Grid Square
Note on offsets in South Africa
|2 metre repeaters:
||The offset is generally -600 kHz,
ie: The transmit frequency is 600 kHz lower than the nominal
repeater output frequency.
|70 cm repeaters:
||There are two sets of repeater offsets,
depending on the output frequency range as follows:
||- 1.6 MHz
||- 7.6 MHz
||In South Africa, there is
an agreement that repeaters using CTCSS use 88.5 Hz
Repeater Call signs
In South Africa repeaters are
allocated ZU9 prefixed call signs, there are some older repeaters
predating this system with normal ZS call signs but they are very few in
number. The suffix of the ZU9 repeaters was initially an indication of
their location ( like a maidenhead locator of sorts ) but this soon
became a problem as one site might have a 2m and 70cm repeater, both
repeaters could not have the same call sign.
Today ZU9 calls are still allocated this way but the location data in
the suffix is not used anymore. Unique call signs are simply issued
for new repeaters on application. Location data is now stored in an
online database for each repeater.
Linked Repeater Network
primary design spec was to develop a system that allows some diversity in
repeaters can either be coupled together or isolated, and the backbone
links can be broken at various points.
The benefit of this is the number of possible linking scenarios for
special events in the area, and the easy isolation of interference.
Click here for a schematic of the
entire Cape Linked Repeater System.
Click here for a link the PEARS
NAT.U.R.N. (Natal Uhf
The Naturn repeater system provides both mobile / base and good portable
coverage in the greater Durban and surrounding areas.
The aim when expanding is to create a triangular coverage effect
successfully resulting in coverage into at least two or more repeaters at
any location.This is true in most cases but no system is perfect.
here to view a map of the system ( from ZS5WT Website )
Click here to visit the Naturn Page on the ZS5WT Website.
Repeater owners please note:
ICASA have informed the SARL that an investigation is being carried out
countrywide to identify any illegal repeaters, both commercial and amateur,
and the penalties for operators without a current licence are extremely
severe. The current legislation allows for a jail sentence, as well as a
massive fine, and possible confiscation of the equipment. Please check your
repeater licences and make sure that they are all up to date.
NEW Repeater Guide
This new live and fully
interactive database is being developed to replace the lists of Repeaters,
BBS's, Beacons and nodes around South Africa. The old lists have required
someone to baby sit them and as a result are often not completely up to
date. This new online system allows repeater managers to quickly and
effectively update their repeater / unmanned device data in real time as it
With this data the SARL will better be able to deal with new licence
applications and also help combat interference. Other spin offs are possible
if quality data can be collected.
Click here to go to this new resource.
Note: This system is still being developed so
feedback would be most greatly appreciated.