OK, so C6 replaced with the correct value but no difference. I also pulled U62 in case that was bad, It wasn't, and also tried with one leg of C6 lifted, but still no output on Pin 6, so replacement CA3130's are ordered. Provided I then get output from that I can then start to chase down where the o...

Phew! :-) It's a good first step, but I'm not out of the woods just yet. I also need to get the cassette input working, and it isn't... Screenshot 2024-04-18 at 13.16.39.png So this is the first stage of the cassette in port, and testing is quite simple as it goes. First you jumper pin 9 (AUX) and ...

I think I read somewhere there is some sort of nose insert which can widen the inside of your nose to help you breathe better.. That may be something I could also try. There is one thing for me that is also of note for my sinus issues, and that is having wax in my ears. I suffer mostly in my right ...

Oxymetazoline is known to cause swelling of the mucous membrane when overused (typically longer than 7 days). I have some experience with this in the family. Ironically it causes the exact same symptoms that it is meant to counteract. Maybe this is some part of your problem. Possibly yes, but I had...

I've been getting a lot of great help from the folks at OSIweb.org, you can see the main post from over there here: My Klyball 600D build Based on what I'd been told over there, I went back and double checked and noticed something I'd missed earlier. Pins 2,4 & 16 of U64 were not starting out lo...

OK, so the parts arrived for the Switch whilst I was in the office yesterday: IMG20240418075814.jpg I'm going to leave the connector to the very end, as it'd be very annoying to fit it then damage it before I had a chance to reassemble the machine, and with the new charge chip installed we should be...

If you plug it in 'chips down' it'll definitely damage it. I don't know whether it's the ROM or something else on the board. Fair enough I have probably broken it. Didnt work either side up but the atari boots without it plugged in. Should really state which side up it goes as a lot of these cards ...

Today's fun has been organising hedge cutting at my Dad's house form 300 miles away at short notice. Yesterday I had a decorator visit the house and give a quotation for external redecoration and he gave an offer to start today, which I jumped at. This morning he texted me saying that to get to one...

Yout have got a 74LS76 and not a 74LS76A haven't you? The truth tables are quite different and with an A variant the K and J values are ignored by the second stage. Screenshot_20240416_121850.jpeg P.S. Putting a logic analyser onto U64 pins 6, 7, 8, 9 and 11 would be useful as the relative timing o...

Yout have got a 74LS76 and not a 74LS76A haven't you? The truth tables are quite different and with an A variant the K and J values are ignored by the second stage. Screenshot_20240416_121850.jpeg Hmm, it was actually an 74LSAN, I have swapped for a 7476 and no different. Will see if I have another...