Radio and rails...

I recently acquired a 10Ghz / 144MHz transverter which should get me a little closer to the band. I do still have a kit to build but having this means I can eventually test that as well. It needs a 10MHz reference input and I was recommended one from an eBay seller in China. The unit arrived today and having had it sat on a 'scope and counter for several hours it does seem to produce a solid 10Mhz signal at a nice sine wave (it has TTL output too). Not bad for £12.

Looks like I am out of action for a few days. We noticed a bulge in the kitchen ceiling which is directly under the shack. There are two pipes that run across under the floor for hot and cold water to the taps and down from the hot water cylinder to the rest of the house. Yes, you guessed it, right under my desk. So, all the radios, screens, Mac and PCs, audio stuff and all cabling out and desk out. On lifting the carpet the floorboard I needed to lift ran right across the room, and right under the test bench! So, all the equipment had to move, including the allegedly portable spectrum analyser and the teleprinter. Fortunately GB7RVB and all the network gear is on shelving attached to the wall so that can stay. And there is was, one leaking lead to copper joint. Far too late to go and get the bits to fix it… and searching for the parts by smartphone is not amusing. Grumble.

Seeing as I closed my valve collection website down and removed much of my personal stuff before it got archived (valvecollector.uk) I suppose I had better keep my story somewhere… I started collecting when I was just a kid but only seriously from about 1999 when I set up my first collection website, initially on a bit of webspace at work. From there it moved about a few times, first to some commercial webspace provided free by a friend who owned an ISP, then to our house, then past three other ISPs to a dedicated physical server which I rented, and then on to a VPS where it stayed until closed down and archived at the beginning of 2024. I used to collect just about everything but it got out of hand when the collection reached 3,000 types,some of which were huge beasts. From then I settled on just CV types and almost all of the non-CV valves - about 1,500 went to the National Valve Museum, which has a website almost as old as my own. I first became interested in valves, and electronics in general when I was about 8. My grandad drew a sine wave on the wall to try…

All this packet radio progressing around the place reminds me of a time long ago, pre-Internet where dial-up BBSs became the new thing in town. Back then I had a BBC Micro and a modem that ran at two speeds - I forget which now (will edit later!) and I persuaded my mum to get BT in to fit a socket rather than the hard-wired phone we had then. This let me plug the modem in. I used to use a BBS called ‘More Summer Wine’ plus one other but I forgot the name. Much of the activity back then is lost in the mist of time (or rather I just can’t remember) but sending and receiving mail was fun. BBS systems were all a part of the wider FidoNet. Mail would be routed between the various BBS systems, many of which only had the one telephone line and so would be inaccessible while that was happening. Indeed, they were mostly single user anyway, although if the sysop was there you could message them via the console of the BBS which was probably sitting in someone’s bedroom. I am reminded of the many times I would set the BBC and…

Made some useful progress on packet radio today. I managed to access a node in Scotland and one near the south coast on 40m, 300 baud. This was using QtSoundModem on the Linux box connected to the FT450D via a Signalink, fed into the random length wire in the loft. Access was via EasyTerm running on the Windows PC at first, but then I managed to compile QtTermTCP so ran that on the Linux box instead. A bit of fun but it proves the possibility of using 40m to interconnect where there is currently no VHF or UHF paths here. Fingers crossed once I get some wire and metal in the air things will only improve.