Had one of these from new for 20 years, wore the tube out until it arced one final time. Was a TV and RGB monitor for a Spectrum +2, amazing picture for a portable. Great video.
The metal in the transformers is "soft" ferrite, a mixture of iron, nickel, zinc and manganese (not always manganese) which has low coercivity. TBH I didn't know all this, I looked it up - I just knew it was some sort of Ferrite which got me curious to find out. I think it's dust particles of these metals which are bonded together somehow. Shango66 has worked on a few Sony sets with cracked ferrite cores or rather the metal clamp which holds the core together - this causes big problems apparently. This set has a really good tube in it - great picture. Enjoyed watching.
These are standard Ferrite cores, used by all line output transformers and chopper power supplies. Straightaway I could tell there is a gap in one of the cores, due to crack. One way to solve this is to coat the component in insulating varnish. I would have removed that damaged transformer and repaired it off the board for a more thorough and stronger repair.
Not so standard materials, after being abandoned by other television engineers, I thought I’d share how I repaired this. I’ve come across 3 different sets which have completely crumbled away. It was clamped, and JB weld used. It’s held up this long. I can’t see how removing the transformer would improve gluing. You must have fantastic eyesight, catching a hairline crack, which is disguised as a seal, or weld, plus added compression from the video.
Had one of these from new for 20 years, wore the tube out until it arced one final time. Was a TV and RGB monitor for a Spectrum +2, amazing picture for a portable. Great video.
The metal in the transformers is "soft" ferrite, a mixture of iron, nickel, zinc and manganese (not always manganese) which has low coercivity. TBH I didn't know all this, I looked it up - I just knew it was some sort of Ferrite which got me curious to find out. I think it's dust particles of these metals which are bonded together somehow. Shango66 has worked on a few Sony sets with cracked ferrite cores or rather the metal clamp which holds the core together - this causes big problems apparently. This set has a really good tube in it - great picture. Enjoyed watching.
Nice indeed!
That hissing sound around near the flyback sounds like it is most likely moisture from being stored away for a long time.
Someone didn’t watch the whole video!
@@The_Studioworkshop Yeah my bad 🤣, glad to see how you fixed it in the end.
These are standard Ferrite cores, used by all line output transformers and chopper power supplies. Straightaway I could tell there is a gap in one of the cores, due to crack. One way to solve this is to coat the component in insulating varnish. I would have removed that damaged transformer and repaired it off the board for a more thorough and stronger repair.
Not so standard materials, after being abandoned by other television engineers, I thought I’d share how I repaired this. I’ve come across 3 different sets which have completely crumbled away.
It was clamped, and JB weld used. It’s held up this long. I can’t see how removing the transformer would improve gluing. You must have fantastic eyesight, catching a hairline crack, which is disguised as a seal, or weld, plus added compression from the video.
Damp