Bummer Old Upright

[Farrell]

> I think that it probably relates to the pin block being shot.
> Pins driven to the plate by the last person should have
> been a good clue. :)

Yes, it was a rather obvious clue, but my point was that although the
particular pins probably had perhaps only 20-30 in-lbs. torque it was enough
to hold the pin and when moving the pitch up and down, the motion was
smooth. After shimming nearby pins the motion on the 20-30 lbs. pins was
jerky.

> What are you shimming pins with?

On old pianos with pins of generally low torque, I will use 120 grit regular
aluminum oxide sandpaper. If the piano has generally good torque (maybe
above 60 or 70 in-lbs.), I might use 100 or 80 grit. I find 120 grit will
get you in the 50 to 80 in-lbs. range, while 80 grit will usually get ya up
over 100 in-lbs. Obviously, it all depends on how big the hole was to start
with. I really like the feel that the sandpaper gives (when turning the
tuning pin - not rubbing it on my nose!).

Terry Farrell
Piano Tuning & Service
Tampa, Florida
mfarrel2@tampabay.rr.com

----- Original Message -----
From: <Ritchiepiano@AOL.COM>
To: <pianotech@ptg.org>
Sent: Tuesday, April 10, 2001 10:24 PM
Subject: Re: Bummer Old Upright


> Good Day-  Terry
>
>  IMHO - I think that it probably relates to the pin block being shot.
> Pins driven to the plate by the last person should have
> been a good clue. :) What are you shimming pins with?
>
>
> have worked on bummers
> Mark Ritchie RPT
>
>
> In a message dated 4/10/01 8:36:45 PM Eastern Daylight Time,
> mfarrel2@tampabay.rr.com writes:
> Snip
> <<
>  What puzzled me was that I went quickly through the pins in the center of
>  the piano and they seemed weak, but good enough for now. After shimming a
>  number of the pins, I noticed that a bunch of tuning pins that had not
been
>  identified as being loose, now had the characteristic of jumping about a
>  half step down when trying to just move the pitch down a hair. Could this
be
>  related to the fact that the coils were squished up to the plate?
>
>  Terry Farrell
>  Piano Tuning & Service
>  Tampa, Florida
>  mfarrel2@tampabay.rr.com
>   >>