Amateur radio (256)

M0RVB

More QO100 progress...

After ages I finally made a rain cover for the POTY and led cables into the garage. Big delay there because the garage was a tip. It still is a tip, but the mess has been rearranged so I have access to the air brick where the cables come in! It's nice that when they built the house in the 1930's they put an air brick right there knowing it would be needed for a satellite dish... The rain cover is made from a sheet of plastic that came out of a smashed LCD monitor. I bent it round a bit of 110mm drain pipe using a hot air gun. it didn't quite come out as intended but it's near enough. The front is from the same piece of plastic and is epoxy glued on - yes there is a gap where the glue was less gluey, I'll fix that later. Nylon threaded bar and nuts hold it in place. And it rained an hour after I made it so it does actually work. After all the messing about everything still works. There is a nice box on order to take the gubbins - ok, the Pluto, bias tee, Leo…

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M0RVB

More QO100 work

I finally mounted the dish. It's been cluttering up the workshop for months now. My original plan was to mount it on a pole by the workshop which would have needed a concrete base and regular trimming of the apple tree and hedge. So, it's mounted on the garage wall with a TK bracket. Aligning it wasn't too bad except I managed first to find the Astra satellite at 19.2 degrees thinking it was the one at 28.2. After I found the second one it was not too difficult to find a satellite carrying Qatar TV using the GTMedia V8. With bolts tightened a bit and after rigging all the gubbins up I found the beacon via an SDRPlay SDR and SDRUno but the levels were well down. The Pluto and SDR Console did a far better job so there will be some setting I overlooked. I copied a couple of QSOs but working outside on a Sunday with the whole estate doing gardening made it rather hard, even with headphones! Anyway, the Pluto is the one that will be used so good to see the whole RX chain working. I have some decent WF100 cable for the LNB feed…

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M0RVB

Minitioune progress

Well I finally got some WF100 cable (CT100 replacement) to get a feed from the now unused Astra dish to the shack. My remaining CT125 is about 10 feet long and would get me nowhere. So I can finally test the Minitiouner on air and it works. No luck with trying to receive GB3YT though, it should be close enough and I have a small 23cm Yagi but our neighbours house is in the way. I will have to go mobile one day and see if it works, which is going to be hard given the rather old Windows laptop has a battery that lasts about 5 minutes and the XYLs laptop is locked down to a work image so no installing Minitioune. Anyway, for now at least it all works. It could us a switch maybe to switch the 12V feed to the antenna socket on and off. Yes it is indeed in a box. This must be the second project I ever built that ended up in an actual decent box looking finished.

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M0RVB

QRP Labs CW transceiver

I finally got round to starting to build the QRP Labs CW txvr kit which I've had since the 2018 Hamfest. Well, no sense in rushing things. I mentioned before the quality of the kit and the really excellent documentation PDF. I think I'm up to page 25. The documentation is all step by step and easy to follow, with a drawing on each step showing what goes where. The one I got is for 40m - the kit comes with a low pass filter and components specific to the band you request. Of course I do still need to learn Morse! That's still on my list of things to do which includes finish the QO100 project which now has two more kits of parts to build, and read up on the full licence for when, hopefully they release the online exam. Here is a shot of the wound components which, although time consuming was actually quite fun. And finally the completed board with the LCD in place. I went through the alignment process which all went according to plan using the built-in menus. The first pic is of the board powered and aligned and the second a bit of…

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M0RVB

Wet string effect

My bit of wet string in the loft, or rather, my fan dipole has been doing quite well of late, albeit only on FT8 and FT4. By fan dipole you are no doubt thinking of a dipole made up of several, i.e. more than two, dipoles cut to various bands and all terminated on one coax. Well, yes, but I only ever got round to making it for 20m and 6m. But even there it has been doing well these past few weeks with all of Europe in easy reach and forays into USA as far as the west coast, Canada, South America, the top of Africa and the Middle East, plus occasional contacts in Turkey, Russia, Oman and Kazakhstan. Not too bad at all given the 20m wires are far from straight, being bent at the ends to fit and not straight horizontally either. I mean it's sort of an inverted vee with a level bit in the middle and does seem fairly omnidirectional, probably by accident but hey. It will tune on all bands from 40m to 6m thanks to the YT-1200. Since I passed the Intermediate I've set the FT450D to 30W, the maximum for the tuner,…

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