17-10-2018, 01:29 PM
Howard came with his Aurora this afternoon. Again it's no fault found. Both he and John Wakely saw giving symptons that looked like jittery line hold. We saw nothing except a possibly dodgy power inlet connector which was a touch intermittent if you jiggled it. Howard's PSU was a switchable voltage wall wart. I took it down from 9V to 7.5V to minimise heat disspation in the Aurora. The minimum that reliably works is 7V.
I also put Stepehn Evans' Aurora back ont hebench and finally saw the slow boot problem that he's had. It's definitely the main 3.3V regulator. Ideally this should be changed but my bodge of a 1K pull-up from it's "power good " output to 3.3V works OK. So that's how I'll leave it.
Apart from my Prowest PM14/1A monitor having field collapse my beloved Tek 2465B scope has a problem. Channels 1 and 2 are crushing the waveform somewhat as you move them down the screen. Channels 3 and 4 are OK. I just hope it isn't one of the unobtanium hybrids that's failed.
I also put Stepehn Evans' Aurora back ont hebench and finally saw the slow boot problem that he's had. It's definitely the main 3.3V regulator. Ideally this should be changed but my bodge of a 1K pull-up from it's "power good " output to 3.3V works OK. So that's how I'll leave it.
Apart from my Prowest PM14/1A monitor having field collapse my beloved Tek 2465B scope has a problem. Channels 1 and 2 are crushing the waveform somewhat as you move them down the screen. Channels 3 and 4 are OK. I just hope it isn't one of the unobtanium hybrids that's failed.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
