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Focus Diode · 11th Sep 2018, 8:45 pm

Indeed Dazzlevision. This modification also applied to the 1500 chassis.

In my case I don't know if I have any suitable 2M/2M2 pre-sets but would imagine uprating the feed resistor to 680K would be better than nothing.

Unfortunately Simon the focus is good at lower brightness levels which suggests the CRT is at self the cause of defocusing at high levels. We've all seen this before. I'll be doing more work to the set tomorrow.

John - Thanks. Gary's set clearly has the right knobs then.

A lot more work to do on the set. I'll get back to it tomorrow.

Picture taken on 625 lines.

11th Sep 2018, 8:45 pm	#27
Focus Diode Octode Join Date: Jan 2006 Location: Borough of Gateshead, UK. Posts: 1,420	Re: Stuck on a BRC 1400! Indeed Dazzlevision. This modification also applied to the 1500 chassis. In my case I don't know if I have any suitable 2M/2M2 pre-sets but would imagine uprating the feed resistor to 680K would be better than nothing. Unfortunately Simon the focus is good at lower brightness levels which suggests the CRT is at self the cause of defocusing at high levels. We've all seen this before. I'll be doing more work to the set tomorrow. John - Thanks. Gary's set clearly has the right knobs then. A lot more work to do on the set. I'll get back to it tomorrow. Picture taken on 625 lines. Attached Thumbnails