Few keys sound problem

[guvech]

Hi guys,
Can you help me with this issue? There is some sound like on metal. It's most of these three keys Eb,F and F#. The tone bar grommets  and springs were replaced (new). The strike line seems to be OK too. The escapement is good as well.
i made a video in you tube with the sound:
https://www.youtube.com/watch?v=-zr-OJpCjig

[Tim Hodges]

That is the sound of the damper felts "kissing" the tine when dampening. Try adjusting them by bending the damper arm up to give it a bit more force.

Only bend the arm just in front of where the bridal strap holds the damper.

[rhodesjuzz]

I think it might be more than just the damper arms. Sometimes with mixed tines you can have a striking line issue. Try playing around with the harp (start with right side only) and notice what happens with the metal like sound. I had the same issue with different tines and I found a setting that improved the suspected tines without affecting the other tines or at least not too much.

I have found the era right tines that I still need to install....

Hope this helps

--Roy

[Ben Bove]

Just to clarify - are you talking about the sound on attack, or the sound on release?