Richard. D.H. Baldwin

[Roger Jolly]

Hi Richard,
                Just serviced a D.H. Baldwin with similar problems that you
encountered.
Friction was between 14.5 to 15gms through out after quite a bit of centre
pinning.
The fast and nasty budget touch weight correction. 
Strike weight was 13.7 #1 bass, tapered and tailed hammers, and loss
1.2gms. The hammer tails are now square with the shanks. The back checks
were replaced, chewed right thro' to the felt. Those ugly checking grooves
just ate them up.
The keys.  Removed all leads from behind the balance rail. about 40 of them
in random positions, go figure.

With springs disengaged DW was just over 90gms in the bass.

Install a 13gm weight 2 3/4" from key front up to C7
Draw a line from AO  4 1/4" to C6 8" back from key front on top of keys.
install a 13gm weights along this line. 

Sorry forget to measure the sharp positions. but similar idea.
Top octave,  one weight per key from about 3 1/2" back to 5"

After reconnecting the springs, and adjusting them. Touch weight went from
56gms to 50grams. nice and evenly across the keyboard.  UW all going from
24 to 21 gms.  The wippen rail was moved forward 1mm to correct the magic
line at the bass end.

The springs only have to support between 5 to 10gms, and are now assist
springs.

This customer could not afford the full meal deal, but what an improvement,
and the customer was delighted.

Punch out all the weights in the C's if there are any. <G> Use a 62gr
weight and find the balance point with the 2 weights draw a line across the
octave for positioning. the job goes very quickly this way.
This particular action worked out well with the first weight in the same
position across the keyboard.
A crudeand quick approximation of strike weight. Mark and remove the hammer
rail, place on the bench.  You can now go from note to note and just place
the tail of the hammer on the scale and check for and strange anomilies.
Measure the width of the hammer with  a set of calipers when you find  any
strange readings, and compare them with adjacent notes. I found a few extra
wide hammers that were trimmed down on the disc sander.
This brought them in line with it's neighbors. 

This 3 different sizes of springs in this model.
You will find the same problems in Samick pianos FWIW it may help you in
Norway.
Regards Roger


Roger Jolly
Saskatoon, Canada.
306-665-0213
Fax 652-0505