Baldwin termination bars

[Overs Pianos]

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Dave and Fred,

I owned an earlier SD-10 (1975) which we rebuilt in 1988 (we have 
just sold the piano to a local enthusiast, and will be re-doing the 
piano again later this year when it will get one of our actions and a 
new key board). It has the one piece per section forged inserts as 
Fred described. The string noise problem with these pianos is two 
fold, the large radius of the bearing bars and the uniformly quite 
long length of the front segments.

The large radius is the most significant problem. We took to the 
inserts on our piano and reshaped them with an angle grinder, 
reducing the bars to a smaller radius. This involves cutting a 
considerable v into the 'joiner bars' adjacent to and between the 
capo and front duplex bars, but it works just fine. This will improve 
the tone very significantly. For those notes which remain noisy, the 
problem will be that the front duplex length is very close to that of 
a partial of the speaking length. You can detune any offenders by 
placing a drop of glue onto the front duplex length segment. This 
will increase the mass of the offending duplex to push its frequency 
down to detune it, reducing its propensity to vibrate sympathetically 
with the speaking length.

I use the glue-on-the-duplex trick quite regularly during the course 
of tuning on the road.

The later SF-10 Baldwins used individual inserts with varying 
lengths. This enabled an insert to be selected, for each note, with a 
string segment length which was detuned to the speaking length 
harmonics. It is a very nice idea.

Best regards,
Ron Overs

-- 

OVERS PIANOS - SYDNEY
      Grand Piano Manufacturers
      _______________________

Web http://overspianos.com.au
mailto:ron@overspianos.com.au
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