08-11-2023, 12:07 AM
Possibility of an ATV broadcast on 23cm or 2.4GHz during the Sparing VHf/UHF FD Saturday night.
I’ve had a thought. Here we go, I hear you say. When things quieten down on the Saturday night of the upcoming Spring VHF/UHF FD weekend (Sat 25th), I was thinking of doing a short live OB from the VK3KQ/P Enfield station at QF12VG later on Saturday night using an Icom IC-905 on 23cm or 2.4GHz, depending on feedback & ideas from those on this list. I’ve got 18el on 23cm at 10W and a 2ft gridpack on 2.4GHz at 2W. I’ll be pointing towards Melbourne. I’ll have a camera or two and a vision/audio switcher running into an HDMI to composite converter then into the IC-905. I’ll probably post up on the VK-Spotter when we’re transmitting. I’m not sure how successful it’s going to be, it’s going to be a bit of a stretch, given the distance into Melb. But we’ll give it a shot.
So if you’ve got an IC-905, you will hopefully receive our video/audio signal and watch it on the front display of your IC-905 or if you wish to view it on an external monitor, grab one of these from Jaycar… https://www.jaycar.com.au/digitech-compo...r/p/AC1722 and an AV cable like this… https://www.jaycar.com.au/3-x-rca-plugs-...m/p/WV7345
As for the band to use, I’ll be guided by your ideas & recommendations and anyone from the Melb ATV group for a recommended frequency. Looking at the WIA bandplan, we’ve got a few options, but I don’t wish to clash with any VK3RTV DVB operations. Again, it’s a bit of a long shot…
Channel 1: Simplex or repeater inputs
FM Maximum bandwidth 18 MHz, centred on 1250 MHz
DVB Bandwidth 7 MHz, centred on 1246 MHz or 1255 MHz
Channel 2: Simplex or repeater outputs
FM Maximum bandwidth 18 MHz, centred on 1283 MHz
DVB Bandwidth 7 MHz, centred on 1278 or 1287 MHz
Channel 1 (secondary): Simplex or repeater output
FM or DVB Maximum bandwidth 18 MHz, centred on 2415 MHz
DVB Bandwidth 7 MHz, centred on 2411 or 2419 MHz
Channel 2 (primary): Simplex or repeater input
FM or DVB Maximum bandwidth 18 MHz, centred on 2439 MHz
DVB Bandwidth 7 MHz, centred on 2435 or 2443 MHz
Cheers,
I’ve had a thought. Here we go, I hear you say. When things quieten down on the Saturday night of the upcoming Spring VHF/UHF FD weekend (Sat 25th), I was thinking of doing a short live OB from the VK3KQ/P Enfield station at QF12VG later on Saturday night using an Icom IC-905 on 23cm or 2.4GHz, depending on feedback & ideas from those on this list. I’ve got 18el on 23cm at 10W and a 2ft gridpack on 2.4GHz at 2W. I’ll be pointing towards Melbourne. I’ll have a camera or two and a vision/audio switcher running into an HDMI to composite converter then into the IC-905. I’ll probably post up on the VK-Spotter when we’re transmitting. I’m not sure how successful it’s going to be, it’s going to be a bit of a stretch, given the distance into Melb. But we’ll give it a shot.
So if you’ve got an IC-905, you will hopefully receive our video/audio signal and watch it on the front display of your IC-905 or if you wish to view it on an external monitor, grab one of these from Jaycar… https://www.jaycar.com.au/digitech-compo...r/p/AC1722 and an AV cable like this… https://www.jaycar.com.au/3-x-rca-plugs-...m/p/WV7345
As for the band to use, I’ll be guided by your ideas & recommendations and anyone from the Melb ATV group for a recommended frequency. Looking at the WIA bandplan, we’ve got a few options, but I don’t wish to clash with any VK3RTV DVB operations. Again, it’s a bit of a long shot…
Channel 1: Simplex or repeater inputs
FM Maximum bandwidth 18 MHz, centred on 1250 MHz
DVB Bandwidth 7 MHz, centred on 1246 MHz or 1255 MHz
Channel 2: Simplex or repeater outputs
FM Maximum bandwidth 18 MHz, centred on 1283 MHz
DVB Bandwidth 7 MHz, centred on 1278 or 1287 MHz
Channel 1 (secondary): Simplex or repeater output
FM or DVB Maximum bandwidth 18 MHz, centred on 2415 MHz
DVB Bandwidth 7 MHz, centred on 2411 or 2419 MHz
Channel 2 (primary): Simplex or repeater input
FM or DVB Maximum bandwidth 18 MHz, centred on 2439 MHz
DVB Bandwidth 7 MHz, centred on 2435 or 2443 MHz
Cheers,