[pianotech] Wurlitzer tuning stability

Jeff Deutschle oaronshoulder at gmail.com
Tue Feb 3 05:04:57 PST 2009


Chuck:

There is a Baldwin spinet that I tune that has pins and rendering like
this.  Since the pins are very tight, it is hard to know just where
the pin should be and also hard to get it there. But also, it is
possible to put a twist in the pin that does not break the static
friction. The pin block is tight enough to hold this twist. So, I jerk
the pin as close as where it belongs as I can. Then I flex the pin
back and forth to see if neutral torque on the pin results in the
proper pitch. If it does not, I put additional torque on the pin to
put a twist deep in the block without breaking the pin free, check to
see if the new neutral torque position results in the proper pitch,
and repeat if necessary. I tune this piano regularly and the unisons
are very stable, (as long as the dampchaser doesn't go dry…)


On Tue, Feb 3, 2009 at 5:38 AM, Chuck Raynor <diggeray at comcast.net> wrote:
> Hi group,
> I was called to tune a ten year old Wurlitzer spinet yesterday and arrived
> to find the piano almost 100 cents flat. Performed a pitch raise and fined
> tuned to 440.  My question is, I found the tuning pins to be EXTREMELY tight
> and VERY "twisty", with very little resistance to movement of the string
> over the upper termination point.  That is, once I could get the pin to
> move, I could vary the pitch 5-10 cents either way by just a gentle pressure
> on the tuning lever (I am using a Fujan hammer).  I'm not comfortable that I
> left the piano in a stable condition.  Any suggestions on how best to get
> this beast tamed?
> Thanks,
>
> Chuck Raynor
> Raynor Piano Service
> Beaufort, SC
>
>



-- 
Regards,
Jeff Deutschle

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