OT: Organ Tuning

[Tim Hoover]

Thanks, Carl!

I spent many years as an Electronics Technician, and don't feel that I'll
have any trouble with the electronics side of things. Some of what I need is
to find out more about the various organ functions (vibrato, etc.). Sure
wish there was a good book on organs like Reblitz did on pianos!

Tim Hoover
Hoover Piano Service

----- Original Message -----
From: "Carl Teplitski" <koko99@shaw.ca>
To: <pianotech@ptg.org>
Sent: Wednesday, July 24, 2002 9:19 PM
Subject: Re: OT: Organ Tuning


> Complicated procedure on some organs, simple on others. Almost all
> modern Transistor
> organs don't require tuning, unless someone has messed with it and
> changed pitch accidently,
> or inadvertently. Most newer organs have one tuning slug on the
> generator pc board, which will
> align all 12 notes in the temperament, thus assuring that all octaves
> will be in tune, all the way down into the bass pedals. A 440, 1 octave
> lower is 220, etc.( not quite !!) E.T. has been done
> at the manufactures level, and doesn't need to be done manually by tech.
>
> Other organs require an adjustment of 12 generators individually. (
> strobe, also )
> The older units are more complex, and require a fair amount of work. If
> an organ goes out of tune all over, I would think that a power supply
> problem has occurred, and that must be addressed. Some organ co.s
> provided service notes for sequence necessary to effect a proper tuning.
> Generally, a strobe type tuning device is best suited for tuning organs
> where only 12
> adjustments are required, or some other means to assure that tuning is
> at A 440, or some other
> pitch to match an existing piano or other instrument.
> Pipe organs are a whole different matter and require the attention of a
> skilled tech.
>
> Carl
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