Poly's normally replaced

Just realised I have never included the pix of the poly's I normally replace e.g from the pre-amp sections, since they were the source of the off-tune reproductions.

"Bad"on left, acceptable on right

The ones I found to be "bad" (aka off-tune) are those on the left in the above pix e.g green and creamish poly.

The yellow poly's on the right are acceptable but I find them to be "warmish" with slight degradation to the higher frequencies. I normally re-use these as by-pass(s) with good results.