MSARS - GB3HY Repeater

Mid Sussex Amateur Radio Society

G5RV G3ZMS

GB3HY

Mid Sussex Repeater Group

GB3HY is a 70cm amateur repeater located at Hayward’s Heath, West Sussex, operating on channel RB5 (RU250). The unit provides excellent coverage of the central Mid-Sussex weald area, radiating from a 6dB gain omni-directional four-stack dipole aerial.

First commissioned in June 1989, the repeater has undergone a series of upgrades and modifications to bring it to its present-day condition.

History:	First operational using Pye 460 series units Upgraded in October 1992 to Motorola MICOR units Recently upgraded to Tait T800 series units
Location:	Princess Royal Hospital Old Water Tower Haywards Heath West Sussex	QTHR: IO90WX NGR: TQ339231 Latitude: 50.99173144°N Longitude: 0.093448086°W
Channel Frequencies:	Transmitter output 433.125MHz	Receiver input 434.725MHz
Current Equipment:	RF rack comprising Tait T800 series units Single-aerial working Motorola four-cavity band pass-and-notch duplexer Logic based on 87C51 micro-controller designed and built by Paul, G0OJA Battery backup using two 12V 92Ahr batteries now operational Implementation of remote control and status-monitoring system in progress
Operating Parameters:	25W ERP 25kHz channel spacing, 12.5kHz being considered Access by CTCSS only on 88.5Hz (code E) Time out period 5 minutes Call-sign and location text sent every 15 minutes when in beacon mode Call-sign text only sent every 15 minutes when in repeater mode End-of-over indicator text K, planned to be B when operating on battery backup
Organisation:	Funded solely by donations from users Donations are welcome; please contact Gordon, G3XTH, g3xth@msars.org.uk
Engineering Team:	Repeater Keeper:	Gordon, G3XTH
Engineering Team:	Engineering Support:	Paul, G0OJA Alan, G8YKV Phil,M5BTB