Turbo Tuner, Guitar Tuner, Chromatic Strobe Tuner, Musical Instrument Tuner

 

ST-200 Stompbox Strobe Tuner

ST-200 Strobe Tuner

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Table of Contents

 

Control Panel

Quick Start

Tuning Modes

Tuning Tips

Features

Flat Tuning

Reference Pitch

The Clear Key

Editing an Open Tuning

Temperaments

Specifications

 

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Turbo Tuner Model ST-200 Owner's Manual

Rev. 0d June 17, 2008

PRELIMINARY - Check Back Often for Updates

The PDF version is up to date. Download here ->

 

Control Panel

   

Stroboscopic Display

Direct Analog Drive for

instant response and

extreme accuracy

 
 

Indicates note is more than 50 cents flat

ST-122 Turbo Tuner Front Panel

Indicates note is more than 50 cents sharp

 
 

Note Display - shows note name in chromatic mode, string number in guitar mode

   
 

Drop tuning indicator - can drop up to 6 semitones.

Lights when A4 is not 440.0

A4 range is 300.0 to 599.9 Hz.

 

Mode indicator. Six modes total, fully programmable

 

True Bypass, Muted Output

 

Mode change button. Hold during power on to change the A4 reference frequency

Mode change button. Hold during power up to change number of flats

       
             
 

 
 

Quick Start

 

  1. Plug the ST-200 into your signal chain.

  2. Optionally connect a 9 Volt external power source. The ST-200 will run for 12 hours continuous on an alkaline battery, enough for about 1,000 tune ups.

  3. Stomp on the switch. When the tuner is on, the output is muted. When the tuner is off, the signal is passed straight through with absolutely no load on the signal. It is 100% true bypass.

  4. Play a note and observe the pattern in the LEDs. The direction of rotation indicates whether the note is sharp or flat. The farther out of tune, the faster the pattern will rotate. When stationary, the note is perfectly in tune.

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Chromatic/Guitar Modes

 

Chromatic Mode

 

In chromatic mode, the tuner responds to all 12 notes of the chromatic scale. The note display in the center of the LED ring will show the letter of the note.

Guitar/Bass Modes

 

In guitar mode, the tuner only selects notes that are defined for the particular tuning. For example, standard guitar tuning has six notes, E4, B3, G3, D3, A2 and E2. The note display in the center of the LED ring will show the string number instead of the note name.

The table below shows the settings pre-programmed into the ST-200. These can be modified for any tuning with up to 9 strings, and can also be set to chromatic mode, with offsets for each note for special tunings. This will be described in a later section.

Guitar

 

Bass

 

CST1
(Standard)

 

CST2
(Drop D)

 

CST3
(6 String Bass)

String #

Note

String #

Note

String #

Note

String #

Note

String #

Note

1

E4

1

G2

1

E4

1

E4

1

C3

2

B3

2

D2

2

B3

2

B3

2

G2

3

G3

3

A1

3

G3

3

G3

3

D2

4

D3

4

E1

4

D3

4

D3

4

A1

5

A2

5

B0

5

A2

5

A2

5

E1

6

E2

 

 

6

E2

6

D2

6

B0

 

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Tuning Tips

The Turbo Tuner is designed to respond quickly to the notes from your guitar without resorting to adjusting the volume or plucking the string differently than you normally would when playing.

The single most important tip:

Mute the strings not being tuned by resting your fingers on them. This will eliminate sympathetic vibrations and give a quicker response and a cleaner pattern in the strobe display.

The Turbo Tuner's true strobe display responds to all the harmonics of the note as well as the fundamental, and the more harmonics, the more complex the display. This does not affect the operation of the tuner. There are several things you can do to reduce the harmonics and get a cleaner looking display:

  1. For electric guitars, selecting the pickup closest to the neck will give the clearest pattern. You can also back off the tone control for even greater clarity on the bass strings.

  2. Plucking away from the bridge gives a clearer pattern than right next to the bridge. Also, try plucking the string with the side of the thumb rather than a pick.

 

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ST-200 Features

 

  • True Strobe Display

Easy to read display instantly shows the slightest difference in pitch of the note played from the indicated note. The ring of LEDs is a true stroboscope, driven directly by the analog input signal and a precision internal frequency reference. This gives zero latency and instantly shows the slightest tuning error.

  • True Bypass / Muted Output

The output of the ST-200 is muted when the tuner is on, and when off the input signal is passed directly to the output. It is completely disconnected from all internal circuitry and the tuner puts zero load on the signal.

  • Extreme Accuracy

The internal timing generator is calibrated at the factory to maintain a precision of ±.02 cents.

  • Chromatic Mode

Permits tuning to any of the 12 notes from C0 to C8, in any temperament.

  • Open Tuning Modes

Tunes to preset or user defined tunings. In this mode the tuner only recognizes notes that are defined for the specified tuning. The tuner comes with a number of pre-defined tunings for stringed instruments. These can be edited by the user.

  • Power On Restore

The ST-200 remembers the settings for mode, drop tuning and A4 changes. No battery is necessary.

  • Flat Tuning

Lowers all pitches up to six semitones.

  • Reference Pitch Change

By default, the tuner uses A4=440Hz as the reference pitch. This can be changed in increments of .1Hz, over the range of 300.0 Hz to 599.9 Hz.

  • Temperaments

The ST-200 can operate in the equal temperament or any 12 note temperament the user desires. The ST-200 can store a total of 5 different temperaments, in addition to the equal temperament.

  • Battery or External 9 Volt Operation

The Turbo Tuner ST-200 can operate for 12 hours continuous from a standard alkaline battery. This is enough for about 1,000 tune ups. It also works with any 9 Volt adapter designed for stomp boxes.

  • Low Battery Indication

When there is about a half an hour of battery life remaining, a low battery warning is shown on the note display every 2 minutes.

 
 

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Flat Tuning


Flat tuning lowers the pitch of all notes below the regular tuning from one to six semitones. To change the number of flats, hold the FLAT button while turing the tuner on. The Flat LED will flash, and the note display will show the number of flats. Pressing the FLAT button will advance the number of flats. Pressing the CAL key will save the number of flats and return to normal operation.

When the number of flats is anything other than zero, the Flat LED will be illuminated.

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Changing the Reference Pitch


The default reference pitch is A4=440 Hz. This can be changed in .1Hz increments to any value from 300.0 Hz to 599.9 Hz.

To change the reference pitch, press the CAL button while turning the tuner on. The A4 LED will flash, and the current setting of A4 will scroll through the note display.You then press the CAL button to scroll through the current setting, and use the FLAT button to change each digit.

After the desired value has been entered, press the CAL button until the note display is blank, and press the FLAT button. The tuner will now resume normal operation.

Whenever the A4 reference is set to anything other than 440.0 Hz, the A4 LED will be illuminated.



The Clear Key


Holding down both buttons while turning on the power will have the following effect:

  • The A4 reference frequency is set to 440Hz.

  • Any flats are cleared.

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Editing A Tuning


You may edit the notes of any tuning except Chromatic. A tuning may have up to 9 strings.

This section is under construction. Please check back later.

Please refer to the PDF manual available here ->

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Temperaments

 

Any of the five modes other than Chromatic may be set as an alternate temperament. When set to a temperament, the tuner will respond to all 12 notes of the chromatic scale, and each note may be offset by up toe ±50.0 cents in .1 cent increments.

This section is under construction. Please check back later.

Please refer to the PDF manual available here ->

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  Specifications

Dimensions

4.4" (11.2cm) x 2.4" (6.1cm) x 1.4" (3.4cm) HxWxD

Weight

246 g / 8.7 oz (including battery)

Output

True bypass, muted output. Zero load on signal when tuner is off. Output muted when tuner is on.

Tuning Range

C0 (16.35 Hz) to C8 (4,186.0 Hz)

Accuracy

+/- .02 Cents (calibrated crystal oscillator)

Reference Pitch

A4 = 300.0 Hz to 599.9 Hz in .1 Hz increments.

Jacks

Input, Output (1/4") and external 9 VDC

Power Supply

9 Volt Alkaline Battery(included), or external 9 Volt DC adapter (optional).

Power Consumption

43 mA typ. Gives 12 Hour continuous operation with alkaline battery.