I sent a reply to your message and it was rejected. I have no idea why. Anyhow --- nothing unusual about the jack spring. A cord goes through a hole in the upper part of the jack and connects to a vertical spring with a hook in the top. Pretty standard I would say. Thanks for your reply. Ted ---------- >From: Robert Goodale <rrg@nevada.edu> >To: pianotech@ptg.org >Subject: Re: Challen Grand Information >Date: Wed, Apr 12, 2000, 12:35PM > > Does this action have a unique type of jack spring? I worked on something that > sounds similar several years ago. The spring was a pull coil type connected to > a separate rail. Very weird. I just faked it as best as I could because it > was in pretty awful shape. I wish I had taken some pictures. I had never seen > anything like it, nor since. > > Rob Goodale, RPT > Las Vegas, NV > > Ted Simmons wrote: > >> List: >> >> Can anyone tell me anything about a Challen 49" grand, S/N 82740? The >> action is primitive, having only a jack with it's associated let-off button. >> There's no repetition lever at all. I've made the action regulation >> adjustments as I would do on an upright, figuring the hammer rail is a rest >> rail and not a rebound rail. The piano is in pretty good condition, no rust >> on the strings, and only about 6 cents flat. >> >> How old is this piano and are there any special regulation specs that I >> should be aware of? >> >> Ted Simmons >> Merritt Island, FL > >
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