CP80s Yamaha

[Elian Degen]

Jim, and List

I am presently servicing several CP´s  (70´s and 80´s), they are very
popular between musical groups for playing on stage. I have not voiced any
yet. The ones I service, (about eight) once the the action is regulated
sound very even. I did have problems with one of them with several pick up
coils in the treble part, but it was not the Yamaha´s fault, but it seemed
someone spilled something and corroeded it out (they used to play with the
lid off)

Since I have been servicing the CP´s, I also wander, what would have
happened if Yamaha used a lower diameter in their strings. Second The lower
bass is very confuse, and very difficult to tune. I agree with you about the
sound, once it is tuned and amplified it sounds nice.

Of course it stays in tune quite well, Has a small cast iron plate, no wood
at all except for the tuning block, no wooden soundboard/bridge system which
changes with humidity,  that makes it very stable.

Now that you mention it I am also curious on the proper voicing for these
hamers, even though I never needed to for the CP. I also found some pianos
with the (correct me if I am wrong) the so called Viena action, also with
leather covered hammers. I had to partialy rebuild one several month ago.
The leather (actualy is buckskin) was in pretty good shape. I don´t know if
I did the right thing, I used a commercial leather cream, and brushed it
lightly with a stiff brush. It worked well enough, considering that the
people who has that piano almost don´t use it.

That is my comment

Elian Degen
-----Mensaje original-----


>Dear List,
>        I have recently purchased a Yamaha CP80. Since it has leather on
the
>hammers,I was curious to know if any techs out there have any scoop on the
>proper (voicing) procedures for these hammers. I might add it plays
marvelous
>and seems to stay in tune quite well. Just searching for some interested
>input.  PS I do have the regulating manual  for the unit (came with my
Randy
>Potter Course). Thanks. Jim Love rct.sat. PTG Associate,James Love Piano
>Services, Midland, Tx.
>