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London
IPK London is a personal site, any software downloaded from here can be used but at your own risk. I accept no responsibility for any misfortune you may have.
IPK
Propagation
Ok so I won’t sit here and pretend I know all that there is about propagation, I know a fair bit I have to say. As with the rest of this site I put information out here that I think can help others, the same with my YouTube channel at https://www.youtube.com/channel/UCJWda3DWvCKJ01V_ZIdhe1g if I have anything I can help people with or I do something that others may not have thought of I will add it. anyway enough transgression for now. As I am sure you all know we are just starting out on Solar Cycle 25, or are we? Who knows? We had some pretty good Sunspots and Solar Flux levels a few weeks ago, then back to zero, I’ll say one thing for it, it’s pretty challenging to try to figure it out. Back on the 29th November 2020 there was 67 SN and 110 on the SFI, today as I type this we stand at 0 SN and 76 SFI (1st February 2021). Not exactly the figures that we want to be seeing but there is a long way to go. My HF radio operation is mainly performed outdoors as I have way too much noise around here, got the street’s telephone cables at the front of the house and Solar Panels on the house next door at the back, not an ideal situation at all. I do intend to keep this page as upto date as possible with possibly the occasional newsflash, after all, when it comes to HF Propagation and Tropo things can change within minutes, Quite litterally. Take a look at the video’s below especially the one to the right, Tamitha Skov she’s worth her weight in gold believe me, If there’s something this lady doesn’t know it can’t be worth knowing, trust me. I have a real keen interest in space weather so I am on her patreon and never miss an episode. Just seen, today the solar flux has hit 90’s yay, about time the sun played ball.
The weather here on Earth is also a major factor for propagation (Or should I call it Tropogation?). Certain times of the year we get what is called Tropospheric Ducting in area’s of High pressure, not always but quite often and if your signal gets caught within that duct it has the possibility of travelling a whole lot further. There are a couple of excellent tools you can use to tell you where (and sometimes when) these ducts will be around, okay so it doesn’t always work out but hey, what does? I have added links to these online tools below I was standing on Dover White Cliffs once using a Baofeng UV5R, you know the one, the radio a lot of people love to hate, and I was talking clearly to someone driving along in Holland, Okay not major but for a little handie that only pushes out 3.5W (well my one does) both our audio’s were 5-9 I have also worked Germany from my house near London on 5W on VHF and considering when I had CB the furthest my signal went was about 5 miles. Check out TX Factor Episode 13 (Left) and watch the interview with Jim Bacon his explanation of Sporadic E is excellent and really does give a greater understanding of what goes on. With Sporadic E it really is Sporadic, you never know where or when it is likely to happen and when it does happen it doesn’t hang around for very long. I have had one Sporadic E contact in Spain, one minute he was there, next minute gone (didn’t even get the chance to wish him 73s). Propagation should be one subject ALL amateurs need to have an understanding of. If you use VHF, UHF or HF this knowledge is (as Jim say’s) like Gold dust.
PROPquest | Es Blog For Sporadic E prediction see
For the upto the minute Tropo conditions go to http://aprs.mennolink.org/
Imagine sitting at home with an AM/FM radio that usually does upto around 100 miles and that’s when you’re allowed upto 50W of power as an intermediate licence holder. As a Foundation Licence holder is only allowed upto 10W of power you may think “I’m not going to get very far on that am I” well let me tell you, that’s where Tropospheric Ducting comes in to play. Under certain conditions you can get a layering in the atmosphere that can form an invisible duct, your transmissions can get caught in that duct and before you know it you’re talking to someone in Germany, Holland, Denmark, France, Belgium and possibly many others. I was talking to someone driving along in Germany and I was using just 5W of power, yes that’s right just 5W. Who needs the Internet? There are a couple of Tropo prediction web pages and these are listed below, obviously these are just predictions, the best thing you can do is take your radio out or use a home based radio with a good antenna and put a call out. I call on 145.500MHz and have programmed many European repeaters. If you want to know more about Tropospheric Ducting and Sporadic-E watch the video above (TX Factor - Episode 13) you’ll find it extremely informative. Jim Bacon explains things very well, One of the best repeaters to add to your memories is the Dutch PI2NOS repeater, Listen on 430.125MHz and transmit on 431.725MHz yes that’s an offset of +1.6MHz (Please Note, do NOT transmit within 100KM of London Charing Cross) I have heard that Dutch repeater many many times and it is the best way of knowing when tropo is in play.
Propquest is a propagation forecast program that is quite interesting esspecially for Sporadic E, click here to take a look
Take a look at Voacap Click Here
Or Take a look at Proppy Click Here
London
IPK
Propagation
Ok so I won’t sit here and pretend I know all that there is about propagation, as with the rest of this site I put information out there that I think can help others, the same with my YouTube channel at https://www.youtube.com/channel/UCJWda3DWvCKJ01V_ZIdhe1g if I have anything I can help people with or I do something that others may not have thought of I will add it. anyway enough transgression for now. As I am sure you all know we are just starting out on Solar Cycle 25, or are we? Who knows? We had some pretty good Sunspots and Solar Flux levels a few weeks ago, then back to zero, I’ll say one thing for it, it’s pretty challenging to try to figure it out. Back on the 29th November 2020 there was 67 SN and 110 on the SFI, today as I type this we stand at 0 SN and 76 SFI (1st February 2021).
Propagation Propagation Tropo
The weather here on Earth is also a major factor for propagation (Or should I call it Tropogation?). Certain times of the year we get what is called Tropospheric Ducting in area’s of High pressure, not always but quite often and if your signal gets caught within that duct it has the possibility of travelling a whole lot further. There are a couple of excellent tools you can use to tell you where (and sometimes when) these ducts will be around, okay so it doesn’t always work out but hey, what does? I have added links to these online tools below I was standing on Dover White Cliffs once using a Baofeng UV5R, you know the one, the radio a lot of people love to hate, and I was talking clearly to someone driving along in Holland, Okay not major but for a little handie that only pushes out 3.5W (well my one does) both our audio’s were 5-9 I have also worked Germany from my house near London on 5W on VHF and considering when I had CB the furthest my signal went was about 5 miles. Check out TX Factor Episode 13 and watch the interview with Jim Bacon (above his explanation of Sporadic E is excellent and really does give a greater understanding of what goes on.
For the upto the minute Tropo conditions go to http://aprs.mennolink.org/
PROPquest | Es Blog For Sporadic E prediction see
Imagine sitting at home with an AM/FM radio that usually does upto around 100 miles and that’s when you’re allowed upto 50W of power as an intermediate licence holder. As a Foundation Licence holder is only allowed upto 10W of power you may think “I’m not going to get very far on that am I” well let me tell you, that’s where Tropospheric Ducting comes in to play. Under certain conditions you can get a layering in the atmosphere that can form an invisible duct, your transmissions can get caught in that duct and before you know it you’re talking to someone in Germany, Holland, Denmark, France, Belgium and possibly many others. I was talking to someone driving along in Germany and I was using just 5W of power, yes that’s right just 5W. Who needs the Internet? There are a couple of Tropo prediction web pages and these are listed below, obviously these are just predictions, the best thing you can do is take your radio out or use a home based radio with a good antenna and put a call out. I call on 145.500MHz and have programmed many European repeaters. If you want to know more about Tropospheric Ducting and Sporadic-E watch the video above (TX Factor - Episode 13) you’ll find it extremely informative. Jim Bacon explains things very well, One of the best repeaters to add to your memories is the Dutch PI2NOS repeater, Listen on 430.125MHz and transmit on 431.725MHz yes that’s an offset of +1.6MHz (Please Note, do NOT transmit within 100KM of London Charing Cross) I have heard that Dutch repeater many many times and it is the best way of knowing when tropo is in play
Take a look at Voacap Click Here
Or Take a look at Proppy Click Here