Onno PA3AKP verteld over Passive Intermodulation, kortweg PIM.
Passive Inter Modulation, oftewel PIM, is een probleem waarmee ze in de professionele telecommunicatietechniek, maar OOK wij zendamateurs, steeds meer mee te maken krijgen. Op een begrijpelijke manier wordt er door Onno uit Leiden ingegaan op de achtergronden, de fysica en hoe PIM gemeten kan worden met dynamische meet bereiken van >200dB. Met een zelf in VB.NET geschreven simulator wordt inzichtelijk gemaakt wat de effecten van PIM zijn in het spectrum bij Multi Carrier systemen. Denk hierbij aan GSM zenders/antennes maar ook aan Multi-Multi contest stations zoals PI4CC in Hoek van Holland of een repeater. Tevens zal de opbouw van de simulator besproken en uitgelegd worden
Voor meer info kan je ook contact opnemen met secretaris Jan PA0SIM (A31@veron.nl).
The story of Jodrell Bank –
Ian G0DMU.
Professor Ian Morison, G0DMU will give a review of the history of Jodrell Bank, one of the world’s premier radio astronomy observatories; from its founding in 1945, the completion of the Mk I (now Lovell) radio telescope in 1957 – still the third largest fully steerable telescope in the world – and the building of the MERLIN array in the 1980s and 90s.
The MERLIN array has the same resolution as the Hubble Space Telescope and many collaborative observations have been made over the past 30 years. Its seven telescopes also link up with others across Europe to provide an instrument whose resolution far exceeds that of optical telescopes.
Some of its most exciting discoveries will be discussed in the context of how radio observations are made – many of which can complement those made by optical telescopes.
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As part of the national “Get on the air to care” campaign with the NHS, the RSGB Tonight @ 8 series of live webinars cover a range of topics and help you gain more enjoyment from amateur radio.
Tonight @ 8 webinars are live-streamed, allowing you to watch the presentations and ask questions online. They can also be viewed on a later date on the RSGB website and YouTube.
Info : https://rsgb.org/main/tonight-at-eight-live-webinars/
CANCELLATION RF-webinar ELF en RF-stralingspreventie door Pedro Wyns, ON7WP
Vanwege onvoorziene organisatorische omstandigheden kan het RF-seminar van morgen 12 juni 2022 helaas geen doorgang vinden. Wij betreuren dit zeer. We kijken er naar uit om iedereen weer te treffen bij het volgende RF-webinar.
vy 73,
Het organisatieteam RF-seminar/ RF-webinar
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Programma RF-webinar
| 12 juni 2022 | ON7WP | *** CANCELLED *** ELF en RF Stralingspreventie – impact van de nieuwe technologiën op de mens in zijn leef- en werk-omgeving. |
Eerder gegeven webinars dit jaar
| 9 jan 2022 | Antennetechniek ON9CVD |
Het gebruik en de toepassing van Antennetuners, en waarom enige achtergrond kennis daarbij onontbeerlijk is! |
| 23 jan 2022 | Actualiteit PA0HKZ + PA0EHG |
Open discussie over de invloeden van de Tonga vulkaanexplosie op de HF banden. |
| 13 feb 2022 | Meettechniek PE1FOD |
Ruisfactor meten met een Spectrum Analyzer |
| 13 mrt 2022 | PA1EJO | EMC problematiek en oplossingen voor PV installaties |
| 10 apr 2022 | Meettechniek PA3A |
Smith Chart “Booster” , (een herhaal-lezing over de Smith Chart). |
| 8 mei 2022 | Meettechniek PD0EK |
Tiny SA |
Het Nederlandse elektriciteitsnet, door Roy PA2RY
Wat er na de meterkast gebeurt, weten de meesten wel. We maken er dagelijks gebruik van en menigeen heeft er aan geknutseld, met of zonder succes hi. Maar wat gebeurt er voor de meterkast? We kennen ze wel, de trafo-huisjes, hoogspanningsmasten en diverse soorten centrales. Roy gaat ons vanavond haarfijn uitleggen wat er allemaal nodig is om bij jouw thuis de lamp te laten branden en wil je na vanavond nog meer weten, dan ben je altijd bij hem thuis welkom om met een kop koffie eens door de boeken te komen bladeren!
Voor meer info kan je ook contact opnemen met secretaris Jan PA0SIM (A31@veron.nl).
Radio waves and antennas … and all that – Peter G3XJE
This presentation covers a range of antenna-related information so there should be something for everyone:
What makes a radio wave? Some mysterious properties of radio waves which you might not have appreciated. How do you launch radio waves? Antennas. Radiation resistance. Radiation patterns. Antenna gain. Transmitting and receiving. Getting power into, and from, your antenna. Resonance, or lack thereof. Feeders. Feeder impedance. Matching – does VSWR really matter? Why can’t you make a monopole? Multi-element antennas. Phased antennas.
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As part of the national “Get on the air to care” campaign with the NHS, the RSGB Tonight @ 8 series of live webinars cover a range of topics and help you gain more enjoyment from amateur radio.
Tonight @ 8 webinars are live-streamed, allowing you to watch the presentations and ask questions online. They can also be viewed on a later date on the RSGB website and YouTube.
Info : https://rsgb.org/main/tonight-at-eight-live-webinars/
Back to the keyboard – Mike G4WNC
Now that we’ve filled our logbooks with FT-8 contacts, maybe it’s time to move on and start communicating again!
In this illustrated talk, Mike Richards, G4WNC introduces you to the best data modes for keyboard QSOs.
In addition to explaining their operation and configuration, Mike will run through some operating techniques to take the strain out of keyboard QSOs.
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Tonight @ 8 webinars are live-streamed, allowing you to watch the presentations and ask questions online.
They can also be viewed on a later date on the RSGB website and YouTube.
Info : https://rsgb.org/main/tonight-at-eight-live-webinars/
Thema avond: de Shack
Aan de hand van foto’s kan toegelicht worden hoe je de shack ingericht hebt.
Tegenwoordig is er meer in de shack te vinden dan alleen een zender en ontvanger.
Maximaal 3 foto’s kunnen opgestuurd worden naar de secretaris.
Voor meer info kan je ook contact opnemen met secretaris Jan PA0SIM (A31@veron.nl).
HF on Holiday – considerations and ideas – Daimon G4USI
Have you ever considered operating while on holiday? In this presentation, Daimon covers the things you might wish to consider if taking a small HF station with you, either at home or abroad. From family, licensing, mode and other considerations, Daimon will focus on some practical examples of antennas and small stations that he uses himself to be QRV, wherever he is.
This presentation will focus on practical aspects of leisure operating as an aside to your holiday, rather than being the main component – this is not a presentation about planning DXpeditions.
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Tonight @ 8 webinars are live-streamed, allowing you to watch the presentations and ask questions online.
They can also be viewed on a later date on the RSGB website and YouTube.
Info : https://rsgb.org/main/tonight-at-eight-live-webinars/
LET OP !! deze bijeenkomst is dit keer NIET in Haelen,
maar bij cafe/zaal “de Ster” , Raadhuisstraat 13, Roermond.
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“JW0X en JW100QO QRV vanuit Spitsbergen” door Marc ON6CC
The first DX-Adventure project is therefore immediately ambitious:
The Arctic Archipelago – Svalbard – IOTA EU026 from April 19-26, 2022.
The setup is to be active with 5 stations on all HF bands in different modes (CW, SSB, RTTY, FT8-FT4). In addition, we have the ambition to be the first to activate EU026 on QO-100. Three team members take on the challenge of driving a snowmobile all the way to Kapp Linné, about 100km east of Longyearbyen.
This is the only location that allows a “line of sight” on the QO-100 satellite. In addition, Kapp Linné is also on the edge of the satellite footprint – speaking of a challenge…
Log4OM : the first decade – Terry G4POP
Terry will talk about the popular free logging software Log4OM. Suitable for all levels of expertise, Terry’s talk will look at the history of Log4OM, its developers and the in-built features of the software. There will be a live demonstration and a chance for Q&A.
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Tonight @ 8 webinars are live-streamed, allowing you to watch the presentations and ask questions online.
They can also be viewed on a later date on the RSGB website and YouTube.
Info : https://rsgb.org/main/tonight-at-eight-live-webinars/
