GB3XY – 3cm Digital ATV

Quick details

LocationCave Wold Radio Station, Riplingham, E. Yorkshire
LocatorIO93RS37
Output frequency10065MHz
Output modeDVB-S2, H.264 encoding. FEC 3/4
Input frequency10315MHz
Input modesDVB-S/S2, 250, 333 or 500kS/s, any FEC
Antenna Slotted Waveguide @ 25m AGL, site 155m ASL
Stream outputhttp://batc.org.uk/live/gb3xy
StatusOff-air, digital rebuild in progress

The rebuild

Construction has commenced and currently the transmit upconverter is being tested. The F6BVA 3cm transverter that was going to be used seems to be not suitable because the bandpass filters incorporated into the PCB appear to be much narrower than anticipated and centred on the narrowband segment around 10.368GHz. An alternative using a Mini Circuits connectorized mixer and Mini Kits multipliers is being developed.

Parts have been sourced from many individuals keen to see GB3XY back on the air. Here is a list of what has been procured so far:

ItemBought or donated by
3cm 10W PA PCB, 3cm DuplexerG3GJA
10W PA and Driver MOSFETsM0DTS
2 x Waveguide Antennas & SMA TransitionsG3GJA/G4YTV
Raspberry Pi4G7AVU
2 x Porrta HDMI SwitchesEYRG
8 port Ethernet switchG3GJA
F6BVA Transverter kit & 2556MHz L.O.G3GJA
ADALM PlutoG4YTV
Link Pi ENC v1 H.264 encoderG3GJA
Equipment Case for hutG3GJA
Waterproof Box for head-endNeeded