All of them, with only two exceptions, those two being R54 and R55. But there is a middle ground that works almost as well and is less work.Resistors that drifted have been replaced. I'm now looking to replace the ones who are prone to make indesirable noises.
Based on this schematic, can you please point out the resistors or various components I should replace to minimise noises (Hiss in particular)
The nature of noise is that the noise/hiss of the first amplifier stage almost totally determines the hiss. So the other middle ground way is to start with the resistors at the input jack of the amplifier, and replace those first. In your schematic, this approach would start with R1, 2, 3, 4, 13, 14, 15, 16, 28 and 29. These resistors are all involved in amplifying up a quite-small voltage, so any hiss from them gets amplified with the signal.
Read http://www.geofex.com/article_folder...carboncomp.htmwithout loosing the "Mojo" factor of carbon comp and carbon film resistors
It's human physiology and psychology. Humans simply like soft even-order distortion.which for unknown reasons affects me quite a lot ...