RCA Flybacks

[timmy]

What usually goes bad is the donut so when they go bad why not just use the solid state hv module there are loads of them on eBay. That unit takes care of the cart voltage as well as the focus voltage, IIRC .

[Findm-Keepm]

Originally Posted by timmy

What usually goes bad is the donut so when they go bad why not just use the solid state hv module there are loads of them on eBay. That unit takes care of the cart voltage as well as the focus voltage, IIRC .

I don't think that is all - the donut is the primary and the secondary, so what generates the HV?

Solid State HV module - care to elaborate?

[Arcanine]

Originally Posted by Findm-Keepm

I don't think that is all - the donut is the primary and the secondary, so what generates the HV?

Solid State HV module - care to elaborate?

I think what he means is why can't a modern fly back be made to work in antique sets? A solid state high voltage section instead of what the sets have now.

[Electronic M]

Originally Posted by Arcanine

I think what he means is why can't a modern fly back be made to work in antique sets? A solid state high voltage section instead of what the sets have now.

That would be quite a feat of engineering! SS yokes are quite different from tube ones, and the tube sets have things like dynamic convergence, and synch pulse windings that most SS flys lacked.....Making up for those differences and incorporating something like that into the existing circuits would be a challenge even for a team of the best of us.

[Electronic M]

Originally Posted by Findm-Keepm

I don't think that is all - the donut is the primary and the secondary, so what generates the HV?

Solid State HV module - care to elaborate?

By dough nut I believe he means the outer HV winding. On some sets where the HV winding has been fried (and all else is fine) I've heard of some success being had in disconnecting the HV winding and driving a trippler ('solid state HV module') off the H out tube plate to get HV.