ACCU TUNER

[Dick Beaton]

Hi Frank....
I took the tuning lever switch off and epoxied it to a small magnet.  I park
the magnet on the plate or anywhere convenient. I couldn't stand the foot
switch thing.  Best
Dick RPT N7RB
----- Original Message -----
From: Frank Cahill <fcahill@erols.com>
To: <pianotech@ptg.org>
Sent: Sunday, January 09, 2000 3:50 PM
Subject: Re: ACCU TUNER


> These devices are very sensitive to static discharges.  I own two of them
and
> both do it.  Are you using a switch on the tuning hamer?  One of my tuners
> tends to destroy the op amp inside that amplifies input from the
microphone if
> I use the swijtjch on the tuning hammer.  It's never a problem in the
summer,
> only the winter.
>
> To prevent this, 100%, get a grounding wrist strap from a computer supply
> store. Put the band around your wrist and connect the other end to the
> strings.  Because the strap has 1 million ohms of resistance, you can't
> electrocute yourself even if the plate of the piano were grounded.  What
the
> strap does is allow static discharges on your body to be dissapated by the
> plate.
>
> I now use the foot switch, held in my hand, and do not use the tuning
hamer
> switch. It usually works.  If you use just the switches on the tuner, it
will
> seldom turn off.  However, it does sometimes. The strap technique is the
only
> thing that seems to work.
>
> I tried to get Sanderson to give me a copy of the schematic diagram for
the
> unit. A friend of mine is an expert in noise abatement, and offered to see
what
> he could do. Unfortunetely, Sanderson declined...seems he's very afraid of
> people cpoying his work.  Too bad! The only complaint I have with the
accutuner
> is it's poor design in regards to sensitivity to electro static dishcharge
> (ESD).
>
>
>
>
>
> Tuner1956@AOL.COM wrote:
>
> > Hello Friends,
> > I recently have had some trouble with my ACCU TUNER shutting off during
> > tuning.  I have never had this happen before if any one has any
information
> > why this would do this please let me know what is going on.
>
> --
>
> Frank Cahill
> Associate Member, Piano Technicians Guild
> Northern Va
>
>
>