Electronics > Projects, Designs, and Technical Stuff
Power Supply Line Filter with Trifilar Windings
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JDW:

--- Quote from: duak on March 10, 2020, 12:37:41 am ---Welcome to production land.
--- End quote ---

I follow you about paperwork, labeling and part numbers.  But you must admit that is still speculation in terms of what we are talking about.  Indeed, I too can speculate that the part number on the label could in fact refer to the windings, yet I could speculate the windings differ due to an error at the coil manufacturer.  An "error" is not outside the realm of the impossible since I have never seen a bifilar LF2 on any Macintosh 128k to Plus Analog Board except this one board.  Assuming the bifilar was a mistake, I wondered if it could have negative repercussions if not swapped out for a trifilar.  But the consensus in this thread seems to be "a bifilar would do just fine."
Mulligan:
I have a Macintosh Plus that I purchased new in December 1988. (It still works perfectly, having recently been awakened from a 25-year slumber in my closet.)

LF2 is bifilar on my analog board, so that suggests yours wasn't a mistake.

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