Reference data for CRT line-output transformers (flybacks / LOPTs), triplers and related EHT components, centred on the HR Diemen range and extended with cross-references from other manufacturers' catalogues. The catalogues that carried it are out of print or offline, and the same transformer is usually listed under several different part numbers.
Search by any part number, by the TV or monitor a part was fitted to, or by electrical characteristics. Where a part is unobtainable, the site lists others of a similar design to consider.
This database draws on a number of legacy sources, including the use of OCR. It may contain information which is ambiguous or wrong — corrections are welcome via the source repository on GitHub.
Most of these transformers have not been manufactured for decades. What is left is old stock, parts pulled from scrapped sets, and whatever happens to be listed on a given day. Cross-referencing widens the search — a part unobtainable under one number may be sitting on a shelf under another — and the substitute suggestions widen it further. There is still a large element of pot luck, and nothing here tells you the condition of any particular part.
Every part page carries ready-made searches across all of its codes at once, on the general search engines and on the marketplaces, including in German, Spanish, Italian, Portuguese, Russian and Chinese — the trade terms for these components differ by country, and stock listed under ТДКС or 高压包 never appears in an English search.
A published cross-reference means a manufacturer sold one part for another's application. It is not a measurement, and neither are the substitute suggestions: inductance, DC resistance and inter-winding capacitance decide whether a flyback works in a given circuit, and none of those values appear in any of the sources.
Much of the reference data originates with HR Diemen, a Spanish manufacturer of replacement flyback transformers. HR Diemen is a trademark of Efiter S.L. This project is not affiliated with, endorsed by, or connected to Efiter or HR Diemen in any way, and makes no claim to their marks. Other sources are credited on the records they appear in.
Corrections, particularly bench measurements, are welcome via the repository.