[pianotech] Sun Protection

[Porritt, David]

Mark:

My recollection from High School Physics – 53 years ago – is that the light we see is all within 1 octave.  Any harmonics of visible light would be out of range of the human visual system.

dp

David M. Porritt, RPT
dporritt at smu.edu

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Mark Schecter
Sent: Monday, August 10, 2009 11:50 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Sun Protection

Greg,

The (invisible) UV rays are shorter than visible violet, the short end of the visible spectrum. Heat's wavelength is longer than red, the longer end of the spectrum. Both can coexist in the same blast of light/electromagnetic radiation, but one does not "contain" the other.

Matter of fact, that makes me want to ask: Is there a visible corollary in light to audible harmonics in sound, such that certain colors (wavelengths) can be seen to be related by (presumably) some measurable or calculatable factor? When colors "harmonize" do the wavelengths have a mathematically "harmonic?" relationship? Thanks for any thoughts.

-Mark

------- Original Message -------
From: "Greg Newell" <gnewell at ameritech.net<mailto:gnewell at ameritech.net>>
To: pianotech at ptg.org<mailto:pianotech at ptg.org>
Sent: 10-Aug-09, 19:36:55
Subject: Re: [pianotech] Sun Protec tion
Michael,
                The UV rays are the ones that contain the heat as I am told.

Greg Newell
Greg's Piano Forté
www.gregspianoforte.com
216-226-3791 (office)
216-470-8634 (mobile)
< /span>
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of ChicagoTuner at aol.com
Sent: Monday, August 10, 2009 10:06 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Sun Protection

I have always thought that protecting the piano from the temperaturewas as important as protecting from the UV rays. I agree with Joe, blinds, drapes and curtains keep the sun completely off the piano. All the time.
Michael
Chicago

In a message dated 8/10/2009 6:29:04 P.M. Central Daylight Time, joegarrett at earthlink.net writes:
All,
I've read the specs on the "UV Filters" for windows. That stuff only stops a small percentage of the UV/IR rays. For pianos you need to stop ALL the Sun on the piano, ALL the time. (PERIOD)!! Anything less and you are shortening the piano's life greatly. Of course this opinion is based on thefact that I had a client that refused to move a piano I had completely rebuilt. Within 5-6 years the piano was toast! He traded it in on a Steinway!![G] Probably has traded that in by now. He blamed all of the piano's problems on my work and that of the refinisher. I told him to take a hike! Haven't seen him since. Good riddance, IMNSHO!
Most of my clients who have a sun problem have been able to solve the situation with vertical blinds or high-end curtain systems. Most 'modern' homes are not designed with pianos in mind, so the problem is previlant! (More like rampant!!) It is solveable. For situations, where there is just partial daily sunlight, I suggest Asian style free-standing screens. This seems to satisfy a lot of the Interior Design freaks.<G>
Regards,
Joe

Joe Garrett, R.P.T. (Oregon)
Captain, Tool Police
Squares R I



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