24-08-2017, 03:52 PM
First light!
EHT currently about 20kV with board being run from external PSU. LTB still on external PSU. All sorts of nasty intermittent effects but there's a picture. It's even fairly converged and purified.A quick degauss showed near perfect purity. It comes into focus, gives at least some brightness and the red doesn't bloom as you raise the brightness which was the classic problem with a failing CRT. So fingers crossed I've got a good tube.
EHT currently about 20kV with board being run from external PSU. LTB still on external PSU. All sorts of nasty intermittent effects but there's a picture. It's even fairly converged and purified.A quick degauss showed near perfect purity. It comes into focus, gives at least some brightness and the red doesn't bloom as you raise the brightness which was the classic problem with a failing CRT. So fingers crossed I've got a good tube.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
