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WEBSDR - IO82LW
Neil Smith G4DBN
I just tried from IO93NR but there's a load of fog and sogginess over Derbyshire and Staffs (I was there today in the fog above Darley Dale) so despite all efforts, no sign of my 10 watts of carrier even on a very long integration with the Chrome audio from the openwebrx looped into Spectrum Lab. I'm reaching Mow Cop OK, but that's a slightly easier path. Too late for any decent low planes for A/S I think. I'll keep trying when I can get a few minutes to operate and think. Not many of those available at the moment.toggle quoted message Show quoted text
On 30/11/2022 21:43, Rob Johnston - G7MHF wrote:
Rob Johnston - G7MHF
I decided to have a crack at a WebSDR for 3cm over in IO82LW to help people who go out /P when there are limited contacts available.
Peter G3SMT who lives close by generously offered me a slot antenna and I have that currently on an Octagon LNB, which I've modified to take external 27Mhz Oscillator.
I'm using a LeoBodnar mini GPSDO, with an external low pass filter to supply the 27Mhz and so far it seems to be working reasonably well, previous attempts with a TCXO Bullseye LNB were very poor.
I had originally intended to use WebSDR as the software but having received no replies to the 3 emails I sent asking to be considered for it, I decided to carry on using OpenWebRX hosted on an RPI4 which I quite like as an alternative.
The software is currently configured for 5 concurrent sessions to give the RPI4 a chance to perform, if there is a reasonable take up in usage, I'll consider a change of hardware to cope with demand.
I 3d Printed a cage to allow the LNB/Slot antenna to mounted on the top of a pole, see attached pictures.
It's currently set to the beacon section of the band and has tags for closest beacons, default RX is GB3OSW.
During the testing period signals have been heard very well locally and even from GB3LEX over in IO92.
I'm planning in the future to add 1.2cm to the SDR having just received a slot antenna from Bert which I'm hoping will perform OK with a Wavelab XN module for RX only.
Address should you want to have a look: -
NB. As it's listening on port 8073 it may not be accessible via web proxies
Happy to receive comments good or bad.
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