Re: Sigh... the K notation again.
Things like capacitors are now often marked as 4u7 (using the letter as a decimal point as well as a scaling factor), something I didn't realize until I started using miniature bead capacitors and surface mount components.
Having said that, I'm looking at the schematic for a NAD7020 HiFi reciever (circa 1977-1984), and I see C421 having a value of 2n2 (2.2nF), and R425 as 4K7 (4.7K Ohm), so I guess it has been used for a while. But it looks like different parts of the schematic were prepared by different people, because it's not consistent!.