VK5ROH

VK5ROH is our Lower South East 70cm repeater.

UHF voice repeater 439.825 MHz output, 434.825 MHz input.

Currently (as of August 2020)

In June 2020, VK5ROH was relocated from Mount Gambier, to The Bluff, 25km west of Mount Gambier and housed in the new hut made available by Gambier Electronics.

The site is 200m ASL and gives good mobile coverage for around 40km, and much further for home stations.

The repeater is a Philips PRF1520, and utilizes a VK5DJ Mk1 controller. It is mains powered, but not battery backed. Separate Tx and Rx folded dipole antennas are currently temporarily installed until tower space becomes available in the future. There is no CTCSS tone activated, though can be enabled if needed.

IRLP (Node 6875) /Echolink (node749891) facilities are interfaced via an off-air link to VK5WSR at the SERG Clubrooms in Mount Gambier.

Due to the increased coverage from The Bluff site, the link to the 2m VK5RSE repeater at Mount Graham was removed as deemed no longer needed by users in the Millicent area.

Top left is Dick Smith Power supply for the 2M repeater. Middle is the VK5DJ Mk1 controller supporting the repeater and one link currently unused. Extreme right is the TAIT power supply for VK5ROH. Beneath is the VK5ROH UHF PRF1520 repeater
The VK5RMG/VK5ROH shack plus dipoles for the UHF repeater on temporary mast.
The two cabinets showing the 70cm repeater in the right hand cabinet with power supply (top right), next down the UHF PRF1520 repeater, the UHF filter cavity on the RX. The battery at bottom is back up for the 2M system.
The left hand cabinet houses the 2M repeater, its three links and 4 sets of filters.

Past History

Originally installed in 2000 on the water tower adjacent to the Old Mount Gambier Hospital (hence the call-sign VK5ROH for Old Hospital) overlooking the city of Mount Gambier. It suffered from regular interference, and the activation of a 118.8 Hz CTCSS tone still did not overcome the problem until a frequency change on May 28th, 2005.

Circa 2005, it was relocated to the top of a disused water tower on a hill on the northern side of the city of Mount Gambier. The repeater was solar powered with the repeater tail indicating the status of the battery.
At a height of approximately 100m ASL the range was not specified although some hear it from about 50km. CTCSS was NO LONGER turned on as the change of frequency had overcome the LIPD problem.

In 2018, the repeater equipment & solar power controller & batteries were relocated from the top of the water tower to an equipment rack at ground level to allow much easier & safer maintenance. At that time, VK5ROH was linked to the Mt Graham 2m VK5RSE repeater to extend its coverage for members in the Millicent area until VK5ROH’s move to The Bluff.

VK5ROH is used to relay the VK5WSR IRLP/Echolink installation in our clubrooms.