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

ppppenguin · 8th Dec 2006, 8:03 pm

AFAIK Charlie Bradley is no longer with us and Display Electronics no longer exists. At present there is nobody in the UK or elsewhere in the world who can rebuild these early Pyrex CRTs. One of the big problems is the Pyrex. This needs specialist glassblowing skills which are not found at CRT rebuilders who haven't had to touch it for over 50 years. The glassblowers who do know about Pyrex and graded seals can probably only be found in university physics departments, assuming they still employ high grade technicians. Possibly also in organisations like CERN and JET where I'm sure they have to do a lot of work with vacuum in glass.

There is certainly one company in the USA which will, at a price, rebuild early CRTs but they won't touch Pyrex.

I hope that even the dud tubes will be kept. One day somebody may be able to rebuild them.

8th Dec 2006, 8:03 pm	#3
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: Pre war CRT photo AFAIK Charlie Bradley is no longer with us and Display Electronics no longer exists. At present there is nobody in the UK or elsewhere in the world who can rebuild these early Pyrex CRTs. One of the big problems is the Pyrex. This needs specialist glassblowing skills which are not found at CRT rebuilders who haven't had to touch it for over 50 years. The glassblowers who do know about Pyrex and graded seals can probably only be found in university physics departments, assuming they still employ high grade technicians. Possibly also in organisations like CERN and JET where I'm sure they have to do a lot of work with vacuum in glass. There is certainly one company in the USA which will, at a price, rebuild early CRTs but they won't touch Pyrex. I hope that even the dud tubes will be kept. One day somebody may be able to rebuild them.