Tag Archives: GMSK

GB7WB & GB3WB Both Using DV-RPTR Modems For GMSK D-Star

GB7WB & GB3WB Both Using DV-RPTR Modems For GMSK D-Star.
Both of our D-Star repeaters have now moved over to DV-RPTR modems and are controlled by Jonathan Naylor’s latest beta software.
Get more details of the DV-RPTR modems here: http://www.dvrptr.de/
Find out about Jonathan’s G4KLX repeater software here: http://db0fhn.efi.fh-nuernberg.de/~g4klx/
Both repeaters are operating better than they ever have and don’t suffer from any problems.

GB7WB GB3WE Use Your DTMF Keypad To Connect D-Star Reflectors

While using either GB7WB or GB3WE Use Your DTMF Keypad To Connect D-Star Reflectors …

The available commands are:

# for unlinking
0 or 00 to trigger the info message
*1C or *01C or *001C to link to REF001C
1A or 01A or 001A to link to XRF001A
D5B or D502 to link to DCS005B

GB3WE February 2012 Tower Configuration

January 12th 2012 New GB7WB Blades and Tail Fitted and Sprayed

GB3WB Mast Lowered To Repair Wind Turbine

GB3WE GB3WB GB7WB New Configuration

GB3WE GB3WB GB7WB New Configuration. GB3WE & GB7WB are ircDDB STARnet Digital Group Calling enabled D-Star repeaters.

GB3WE is the top mounted dual-mode VHF FX5000 D-Star GMSK/FM repeater.
GB7WB is mounted in the middle and is a UHF FX5000 D-Star GMSK Node.
GB3WB is mounted at the bottom and is a UHF Key Repeater for FM.

GB3WE and GB7WB FX5000 Repeaters

GB3WE and GB7WB FX5000 Repeaters. GB3WE at the top in brown is our VHF 2m dual-mode D-Star (GMSK) and FM repeater. Underneath is GB7WB, our UHF 70cm D-Star (GMSK) repeater.

GB7WB FX5000 UHF D-STAR GMSK Repeater

GB7WB FX5000 UHF D-STAR GMSK Repeater

GB7WB Modifications to FX5000 Transmitter For D-Star Operation

GB7WB Modifications to FX5000 Transmitter For D-Star Operation.

To modify an FX5000 VHF or UHF for D-Star GMSK operation simply add a 47nF capacitor across C493 (22nF) which is next to IC403 (TL072) in the transmitter driver module.
Then remove C536 (10uF) which is next to IC504 (LM324)

No modifications are necessary to the receiver module.