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Old 20th Jun 2017, 3:21 am   #5
Maarten
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Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 4,185
Default Re: Philips EL3300/EL3301 oscillator coil

Philips used a rather complicated indirect index system for part numbers. As a general rule, numbers starting with 4822 are reserved for the service department while factories used completely different numbers, so 4822 numbers are rarely found on factory mounted parts and parts almost always have another number as well. The number you mention is probably even a bit more meaningless than normal 4822 numbers as it belongs to a short lived system that was only used in 1963/1964.

My working hypothesis at this moment is that the coil with 3 stripes is a bit older than the coil with 4 stripes and that the stripes correspond to the last 3 or second last 4 numbers respectively of the factory part code but they even could have used an entirely different coding system. I fully expect that it might take years to find this out in more detail, so it probably isn't of practical use for you (it is faster to find someone with the right measuring equipment and just measure the induction).
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