While I am in the process of making some changes to my K1, I will be moving
two Polystyrene caps from the bottom PCB up to the top. The two caps form
part of the VFO tuning circuit. The two bottom caps rest closely along the
steel cabinet and slight flexing of the cabinet noticeably alters VFO
stability and hence, my reason for moving the caps up to the top of the
board. I fully realize that flexing a cabinet while operating is not a
normal procedure, but I would nevertheless like to optimize VFO component
placement in the K1.
One end of Polystyrene cap C12 is connected to circuit ground. Polystyrene
caps offer the benefit in that one end of the cap represents the outer
foil -- thus allowing the designer to make use of its inherent shielding
abilities. Most Polystyrene caps have a red tracer on one end to designate
the outer foil lead, but the caps as used in my K1 have no such tracer.
Unfortunately, the K1 manual's part section does not list the caps'
manufacturer. Otherwise, I would refer to a datasheet.
So, my questions is -- can the shielding polarity of the Polystyrene caps as
used in the K1 be determined by looking at the orientation of the part value
(i.e., 1200J) as printed on the cap body? Tnx!
Paul W9AC
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