tuning lower notes

[Alpha88x@aol.com]

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Greetings, 

              I find that tuning lower notes on some pianos (the wire wound 
ones) I dont always get clean octaves. There seems to be, and this is only on 
some pianos, these extra fast beats.  I try to block out the faster beating 
frequency(ies) and tune using the (the octave's) fundemental, and even when I get 
that low fundemental "in" there's this annoying faster beating. I am tuning 
the bass mostly by ear!  Am I doing something wrong, or is it just cheap wire 
wound strings? What is causing this? 
It seems to only happen on the cheaper spinets and consoles, occasionally an 
upright or grand will have this problem too, but not as often.

Julia, 
Reading, PA

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