[codefox1]

schematic here: http://www.nostalgiaair.org/PagesByModel...013205.pdf

I'd stick with the value of R19 found in the set, provided it is original, and measures the same as indicated on the part; probably wouldn't make much of a difference in this case - certainly not a show stopper. From what I've seen, minor changes were made all the time depending on what parts were on hand, or to improve reliability/performance, and documentation for non critical stuff just wasn't done with regularity.