DC and rust

[John Ross]

Make sure they are not using a non DC humidifier treatment. Some of them are 
corrosive.
A few years ago a Yamaha required a complete restringing, due to a corrosive 
humidifier treatment being used.
I do not have direct knowledge of the specific instrument, but that is what 
I heard. It is too long ago to remember where from.
The DC literature specifies that only theirs be used.
John M. Ross
Windsor, Nova Scotia, Canada
jrpiano@win.eastlink.ca
----- Original Message ----- 
From: "Geoff Sykes" <ivories.52@earthlink.net>
To: "'Pianotech'" <pianotech@ptg.org>
Sent: Saturday, April 23, 2005 3:34 PM
Subject: RE: DC and rust


> John --
>
> Don't think they will spring for the cover, but perhaps the humidifier 
> part
> of the system is overkill in this situation. I think your suggestion of
> just disconnecting the humidifier and leaving the de-humidifier might be 
> the
> best choice. Don't need to add moisture where there is already too much.
>
> -- Geoff Sykes
> Assoc. Los Angeles
>
>
> -----Original Message-----
> From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On 
> Behalf
> Of John Pasterczyk
> Sent: Friday, April 22, 2005 9:08 PM
> To: pianotech@ptg.org
> Subject: Re: DC and rust
>
>
> Geoff,
>
> I live about 1.5 miles from the ocean in L.A.  The
> dryest my house has ever gotten was 65% R.H.  (Once
> monitered and recorded 24/7 for an entire year for an
> unrelated film industry project, however I found the
> info quite relavent to our profession).  This, and
> stories from other L.A. technicians that they have
> removed more humidifiers than they've installed.  Do
> you really need the humidifier?  We don't have the
> bone chilling winters that cause us to turn on the
> heat and dry out the house.
>
> In my community the strings rust prematurely from the
> high relative humidity, and salt content from the
> ocean...my first recommendation to all new piano
> owners is an Edwards String Cover...even more so than
> D.C.
>
> John Pasterczyk
> Registered Piano Technician
> http://www.southbaypiano.com
>
>
> Forwarded Message
>
> Date: Fri, 22 Apr 2005 14:13:10 -0700 (GMT-07:00)
> From: "Geoff Sykes" <ivories.52@earthlink.net>
> To: pianotech@ptg.org
> Subject: DC and rust
>
> Plain Text Attachment [ Download File | Save to Yahoo! Briefcase ]
>
> Greetings all --
>
> About a year ago I replaced an old rusted out DC
> system in a clients
> grand with a complete new system and control box. The
> water tank support
> rails had literally rusted away and the tank had
> fallen out. Did I say
> it was old? Anyway, at the same time I also replaced
> two broken strings
> up in the high treble. The entire piano was on the
> rusty side and my
> guess is that age along with rust had caused these two
> strings to break.
>
> On a return visit last weekend I found another string
> up in the high
> treble had broken. I also noticed increased signs of
> rust, most notably
> on the new strings I had replaced only a year ago.
>
> The client lives in Los Angeles about three miles from
> the beach. She
> tends to be cold most of the time so the forced air
> heating system runs
> a lot. While the vent in the piano room is blocked,
> there is a sliding
> glass door that is infrequently open leading to the
> outside. All in all
> not what I would call an environment that would be
> rust promoting.
>
> Could the DC system be causing the rust? I'm open to suggestions.
>
> -- Geoff Sykes
> Associate Member
> Los Angeles Chapter
>
>
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