[CAUT] Undercover (install notes)

[Mark Cramer]

Hi Barbara,

the last time I tuned this piano (December), the lowest tenor note (B2
perhaps?) was 10 cts (9. something) flat, with following notes less and less
so, until about D4, where everything was pretty much on pitch all the way to
the top.

Prior, the lowest tenor would be 25 - 30 cts sharp or flat, depending on the
season, with pitches falling or rising incrementally well into the 5th and
6th octaves. It was also common to find the bass 4 or 5cts flat during dry
seasons.

So I'll call this a success, though I've had more dramatic results with
other installations.

Yesterday I tuned a GS-30 with the same installation. Nearly the same curve
(15cts flat at B2  rising towards octave 4) though I suspect in both
instances, if the humidifier was never allowed to run dry, the pitch
would've been held to within 4 or 5 cents at B2.

(Tattle-tale humidifier pads turn "cardboard stiff" all the way down, if
allowed to run dry. Re-wetting them won't change this... and "they" think
I'm clairvoyant ... ;>)

thanks,
Mark C.





-----Original Message-----
From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org]On Behalf Of
Barbara Richmond
Sent: Friday, February 23, 2007 11:30 AM
To: College and University Technicians
Subject: Re: [CAUT] Undercover (install notes)


Hi Mark,

OK, I'd like to hear the "rest of the story."  How much of a change did the
undercover make? (in cents if possible, please).  I don't doubt that it made
a difference, I just want to know how much.

Thanks,

Barbara Richmond, RPT


----- Original Message -----
From: "Mark Cramer" <Cramer at BrandonU.ca>
To: "CAUT" <caut at ptg.org>
Sent: Thursday, June 23, 2005 11:12 AM
Subject: [CAUT] Undercover (install notes)


> Thanks to everyone who dropped by the Dampp-Chaser booth in KC to see our
> install demonstration.
>
> Roger asked for feedback regarding the "heat and bond method," so here's
> some of my own, from an install completed this just twenty minutes ago:
>
>
>
> KG-3c / Church Piano / G6PS-50 system plus 2-25w bars / still swings 25
> cents @B2 seasonally!
>
> Arrived in the sanctuary at 11:15, finished and submitted my bill at
> 11:50.
>
> Thirty-five minutes to fit and trim the undercover... perhaps sooner, if
> the
> caretaker had taken my hint(s).
>
> Pre-stapled the bonding-tape around the rim for convenience. (feeling a
> bit
> shaking today, too much coffee!)
>
> Made sure to use the Heat n Bond product marked "SUPER" or "SUPER WEIGHT."
>
> Started fitting/ironing at the corner of the bass rim and belly rail, to
> take advantage of two straight sides.
>
> Saved loads of time, as only the treble and tail sides required trimming.
>
> Second pass all the way around with the warm iron, just to be sure.
>
> Done!
>
> Notes for next time:
>
> 1.) Bring fleuro-trouble light, makes it easier to see where the bonding
> is
> and where to trim.
>
> 2.) A dull knife isn't a knife!
>
> 3.) Send the caretaker on a long errand while I'm working! ;>)
>
> best regards to all,
>
> Mark Cramer,
> Brandon University
>
>
> _______________________________________________
> caut list info: https://www.moypiano.com/resources/#archives
>