[CAUT] temperature and pitch

[Ron Nossaman]

Fred Sturm wrote:
>I don't like the idea of a bunch of people thinking 
> "Dampp-chaser systems cause pianos to be hot and unstable in pitch" or 
> similar nonsense. 

And I didn't say anything to that effect at all. These are 
fine systems. I said after the strings cooled to room 
temperature, the pianos were stable and very close to pitch.


>There is a discrete reason for a particular set up to 
> produce this result. I described it. It is unusual, I think.

Yes, it's an unusual setup. It's not unusual at all, however, 
to have the pitch drift slightly for a few minutes in any 
piano with a D/C when it's first opened up. It might also 
benefit all the readers to be aware of that effect, which is 
why I mentioned it.


>     For my part, as I said earlier, I would not put a D/C system in a 
> piano with a cover that is mostly impermeable to moisture, nor would I 
> put such a cover on a D/C installed piano. 

The effect I spoke of is temperature related, not moisture. 
The pianos stay in tune vastly better than they did before the 
D/C installation. Incidentally, the cover over the grand is a 
standard quilted cover, nowhere floor length, and quite 
moisture permeable. Just like most all the other covers out 
there. It does the same thing the verticals do, just not to 
the same degree.


>What you do and how you deal 
> with the situation is your business. If it causes you no pain, hey, no 
> problem to me.

Then why are you so intent on pounding it and trying to give 
the impression I'm being negative about D/C and negligent of 
my customers' interests? I offered information I thought was 
interesting and potentially useful to a number of techs out 
there. If you find such information of no value, fine.
Ron N