UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

ppppenguin · 27th May 2006, 9:55 am

The earliest pre-war sets were dual standard 240/405. A very few may even have the switching still present. 6kHz line scan may be possible on a modified 405 set but on most sets with flyback EHT you may well have trouble getting both width and EHT right at the same time. The frame rate should not be a problem. The sync separator may need to be modified too. Otherwise you could use a 'scope as discussed in a thread many months ago.

I'm sure that Darryl will give you the details of the 240 line standard that he used to when designing the original Aurora. Just PM him and ask. I wouldn't be surprised if he got the details from David Boynes (Fernseh in the forum).

27th May 2006, 9:55 am	#3
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: Baird 240 line standard details wanted The earliest pre-war sets were dual standard 240/405. A very few may even have the switching still present. 6kHz line scan may be possible on a modified 405 set but on most sets with flyback EHT you may well have trouble getting both width and EHT right at the same time. The frame rate should not be a problem. The sync separator may need to be modified too. Otherwise you could use a 'scope as discussed in a thread many months ago. I'm sure that Darryl will give you the details of the 240 line standard that he used to when designing the original Aurora. Just PM him and ask. I wouldn't be surprised if he got the details from David Boynes (Fernseh in the forum).