Typical pianos tuned: European - Aeolian, Allison, Ascherberg, Barratt & Robinson, bechstein, Bentley, Berry, Bluthner, Borg, Bosendorfer, Brinsmead, Bristol, Broadwood, Challen, Collard & Collard, Chappell, Cramer, Danemann, Duysen, Eavestaff, Erard, Fazar, Forster, Gaveau, Gors & Kallamn, grotrian, Hoopkinson, IbachKaps, Kempble, Kirkman, Knight, Lipp, Morley, Murdoch, Monnington&Weston, Petrof, Pianola, Pleyel, Rogerrs, Ronisch, Samick, Scheidmayer, Schiller, Schimmel, Seiler, Spencer, Steck, Steinbach, Steinway, Strohmenger, Weinbach, Zender, Aimmerman, Amerian-Baldwin, Chickering, Hamilton, Ivers&Pond, Kimball, Knabe. Eastern - Kawai, Yamaha, Young Chang, Pearl.
My aim is to tune pianos to A440hz which is commonly called 'concert pitch'.
Clients are asked to note that the total load on a tuned piano - all the strings added together - is said to be around 12-20 tons. So if a piano is grossly out of tune, the stresses introduced during tuning will make immediate stability unlikely. when an instrument is structurally imperfect, A440 may not even be possible. And like all stringed instruments, brittle or rusty wire may result in strings breaking.
When a bass string sounds dead or 'tubby' it is usually due to corrosion entering the copper coils. The only real solution is to have the string remade. Although it is possible to obtain ready made strings, I do not fit them as they differ in sound quality from bespoke strings.
All tuning is by ear.