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I just saw my first correlation between Brians rx and Norman Lockyer. However, it is always noticeable that Brian's rx is lower noise and higher gain than the others. [image: Gb3MBA_rx.jpg] Tony

Hi Mark Yes, I did see that jump in signal strength which I initually thought was a reciever fault. I'll relabel my graphs.. -- -- Martyn

The Crowd funder site has recently released a YouTube video with an interview with the designer. It's a bit basic in places, but it's interesting to see the design process he went through. You can

Hello, ??? ??? I have seen a similar problem trying to separate 23.4kHz and 24kHz with that receiver. Adjusting the Q too high can cause it to oscillate, but that is easy to avoid. Having the

Hi Martyn, I use SpectrumLab with a b/w of 150Hz for each freq that I monitor and the spectrum plot still shows that HWU is off the air. It would be interesting to see if you trace for 24th November

Hi Mark A good point. I am using the UKRAA receivers, the tuning is mainly carried out by the loop aerial and ATU which? is quite High Q. The front end of the receiver also has a Q plus frequency

Just seen this on imo-news io group... https://www.imcce.fr/recherche/campagnes-observations/meteors/2023wir May be of interest. BTW enjoyed Monday's Zoom, really clear exposition of the black hole

Hi Mark - I don't think my magnetometer plots are very convincing.... I've attached the curtailed plot for the 03 Dec (we had a power outage affecting part of our property from 14:00 or so on). And

Martyn, That's curious, I haven't received anything on 22.6kHz since 17th October when the tx went off and disappeared into the noise. I wonder what your receiver bandwidth is? Cheers, Mark

My graphs from 20231203 I can see the oscillation on 22.6kHz as well, but not as pronounced. The magnetometer is still unsettled in By following the CME impact a few days ago but Bx may show some

Some time back Callum reported a rapid oscillation in the magnetosphere. I read that these ULF waves range in frequency from 1mHz to 5Hz. Yesterday (3rd Dec) we had a rapid oscillation on 22.1 and

Hi Mike I posted this image last year on the beacon discussion group. This was with a Moxon pointing up, and a 4 element pointing at the beacon - the two being fed into the cancellation system.

Hi The RAZoom Programme for 2024 has now been published and can be found here ( https://britastro.org/section_information_/radio-astronomy-section-overview/razoom-programme ) Kind Regards John Berman

Hi Radio Astronomy Section Zoom Friday the 1st Dec 2023 Prof Clive Tadhunter? 'Quasars, black holes, and future of the Milky Way' Video is now on YouTube here (

Re elements pointing at TX that’s the element ends of course

Tony In my now dim distance professional life I built a microwave anechoic chamber and used a phase shifter to balance out background reflections and I do know how sensitive the nulls are even under

Hi Mike I am even closer than Dave - Leicester, and get a strong direct signal. I have done a lot of experiments with a vertically pointing Moxon and secondary dipole antenna with phase shifter to

Hello Mike Dave's receiver system is using an indoor HB9CV type antenna in his apartment loft space. This is an elevated location with a good path towards the beacon hence the strong direct signal.

Comments please! https://astronomy.me.uk/first-light-on-additive-interferometer Andy

....that was my thought..! Sent from Outlook for Android -- ??? Paul Hearn ?? paul@... ?? RA Section Director ??