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Leon Crampin · 3rd Feb 2023, 1:22 pm

It's quite possible that Philips supplied Siemens ferrite in their kits. The Philips group frequently ousourced and re-marked items from other suppliers if this was expedient. For instance, I have some Mullard IW4-350 rectifiers that are obviously MOV MU12 devices.

Ferrites for the kits may have been a very small production run compared with the needs of the radio industry.

One thing I found to be irritating concerning Philips and the supply of ferrites for production was that they didn't actually produce some ferrites listed in the data book unless there was significant demand. My application was a small run, and my chosen ferrite tube was not actually produced, despite the fact that they had submitted samples - hence a move to Siemens.

Leon.

3rd Feb 2023, 1:22 pm	#12
Leon Crampin Octode Join Date: Nov 2005 Location: Surrey, UK. Posts: 1,874	Re: Grundig Ferrite Rod design It's quite possible that Philips supplied Siemens ferrite in their kits. The Philips group frequently ousourced and re-marked items from other suppliers if this was expedient. For instance, I have some Mullard IW4-350 rectifiers that are obviously MOV MU12 devices. Ferrites for the kits may have been a very small production run compared with the needs of the radio industry. One thing I found to be irritating concerning Philips and the supply of ferrites for production was that they didn't actually produce some ferrites listed in the data book unless there was significant demand. My application was a small run, and my chosen ferrite tube was not actually produced, despite the fact that they had submitted samples - hence a move to Siemens. Leon.