Yamaha Jack issue

[Scott Jackson]

Whip assist springs? I've not encountered those on an upright.

swj

  ----- Original Message ----- 
  From: Fenton Murray 
  To: Pianotech List 
  Sent: Saturday, March 22, 2008 3:06 AM
  Subject: Re: Yamaha Jack issue


  Oh yea, Yamaha's from the 60's and early 70's had this problem. 
  Regarding the non returning jack in an upright with all regulation and friction proper in the action, do not forget the key. It must not have excess friction and must be balanced correctly. Also check hyper active whip assist springs.
  Fenton
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