I am making a copper penny whistle from instructions I printed from the net and within it on one page hole 2 is an F and on another page she has it as an F#.Which is it ?
Thanx Brian
From the bottom of the whistle (assuming it’s a D), if the second hole up is uncovered it will sound an F#.
Have fun making,
Erik
I concur. A d whistle will have an f#. 
Good luck–Tom
Does it become F# (or F) based on distance from the fipple or the diameter of the hole?
just curious…
Both. The closer the hole to the fipple ende, the higher the pitch. The larger the hole lower the pitch, iirc.