[sdiy] aging transformer replacement

[jhno]

hello sdiy! it has been a while.

i come bowing and scraping to know:

is it straightforward to replace power transformers in aging synths?

several of my devices start to hum/buzz acoustically after being powered up
for a while - typically 0.5 - 2 hours, say. it is the transformers, of
course. i imagine they are just getting old.

the main offenders are:
eventide h3000
orig. nord lead
roland jx10
prophet 5 r3

some of the power supplies are more elaborate than others. if i measure
each winding utilized and find a transformer (or multiple units) that give
the same voltages with plenty of volt-amps to spare, is it safe to attempt
the replacement?

or, is there some other way to cure the hum? it can be quite distracting.


as an aside, i have bought a few 110 to 110 transformers for isolation and
power conditioning purposes. these have buzzed louder than anything. very
industrial.

jhno