How Philips made RF & IF transformers 1937/48 ? (Algemeen)

door Robert Lozier @, 21.08.2015, 13:46 (3384 dagen geleden)

How did Philips make RF & IF transformers 1937 to ‘48?

First time posting on this forum…. I have three Philips radios that use a technique to manufacture the radio frequency and intermediate frequency transformers that appear to be unique to my American eyes. I refer to the parts as used in my D57AU, Mullard MAS24(Philips 660A) and Philetta 204U-19 (exported to Sweden).

Are there any articles (in any language) on how Philips manufactured these parts? Any photographs of the manufacturing process? I would like to gather enough information to write an article for one of the vintage radio publications here in the USA.

Thanks,
Robert – KD4HSH
Near Charlotte, NC; USA


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