Problems with repetition

[alkan]

Hi folks!

There seems to be a problem with the action of my 3-months-old Kawai K-5 ATX that happens when I repeat a note in a way such as with the very first notes of the famous Hungarian Rhapsody No. 2. The second strike would often deliver a much softer tone or even no sound at all. On the other hand, fast repetitions work well as long as I don't lift my fingers off the keys. So the "dropouts" only happen if I release the key very quickly between the strikes.

As far as I can judge the cause lies in the hammer rest rail that makes the hammers bounce back towards the strings too much. During the "bouncing back phase" it seems to be impossible to produce a (normal) tone. When I don't let the hammers hit the shank or put my fingernails between them (which prevents them from bouncing back) everything is fine.

Last week my dealer sent a tuner (technician?) to check and tune my piano. Unfortunately, he wasn't able to solve the issue. Instead, he assumed I had to live with the problem as it might stem from the the fact it is a hybrid piano.

Is that really true?

(Please forgive me my other post: http://www.pianoworld.com/forum/ubbthre ... ost1904274.)

[Barrie Heaton]

As you have an Hybrid piano the setoff (letoff USA) bit has been pointed out to you on the other forum. However, sometimes the checking is also set back again to accommodate the silent system. This will effect reception on soft double strike as the hammers notch (nucle USA) is held as a less steep angle so the jack struggles to get fully under the notch. Teflon powder on the Notch can help with this but the piano regulation need to be spot on all the time with that type of system.

You need to get in a Kawai Tech or a tech who has done the Kawai course, if you live in the USA then contact Don Mannino (Goggle him) he will direct you to a suitable tech if you live in the UK contact Kawai

Barrie