Unlike more modern Peterson strobes, legacy models such as the Peterson 400, 420, 450 and 700 do require occasional calibration.

If you require service, please open a support ticket and return the tuner for repair.

Adjust your instrument until the pattern is as close to still as possible. Strobe displays are 'real-time' and extremely precise. They require very fine tuning adjustments to stop the display because the frequency/pitch of any instrument is never totally stable.

You'll quickly learn to read the display, make the most precise adjustments and appreciate the high resolution that only a Peterson provides.

Cases are available for the AutoStrobe™ line, the StroboClip HD and the StroboPLUS HD/HDC.

A Peterson TP-3 clip-on tuning pickup is a very versatile device with a 1/4" connector that can be clipped onto any portion of the instrument that vibrates, such as the headstock of a guitar or the bell or lead pipe of a horn.

A Peterson Pitch Grabber Mobile Tuning Clip utilizes a 1/8" connector for use in mobile phones or tablets with software tuners.

For instruments with a flat resonating surface, you can use a suction cup tuning pickup to reduce ambient noise interference.

If you have not registered your tuner, you must do so before opening your support ticket.

All products returned for service must have a support ticket number on the outside of the box as well as on the accompanying paperwork on the inside of the box.

We strongly recommend shipping with tracking information and insurance.
Peterson Electro-Musical Products, Inc., and subsidiaries thereof, are not responsible for lost packages in transit to our repair facility.

Include a description of your problem in both your support ticket and paperwork included with your product. Please be specific about the type of malfunction as well as the conditions under which it occurs. Include your name, address, phone number, and email address on the accompanying paperwork.

There is a minimum charge of $95.00 US plus return shipping charges for all Mechanical Peterson tuners received and a minimum charge of $48.00 US plus return shipping charges for all LCD Peterson tuners (unless subject to Peterson warranty). If you would like an advance estimate for service, you must include a request in writing with the product you ship. If you choose not to have your product repaired, there is a $48 diagnostic charge plus return shipping.

Payment options include PayPal, VISA, MasterCard, AMEX and Discover Card.

Any balance is due within 30 days of the completion of the repair. After 30 days, a storage fee will be charged. After 90 days, your property will be considered abandoned and will disposed of at our discretion.

For international (non-USA) repairs and for all Conn and Node tuner repairs, please open a support ticket as different procedures may apply.

For service of Peterson tuners:

Peterson Electro-Musical Products, Inc.
11601 South Mayfield Ave. Alsip, IL 60803 USA
TEL: 708-388-3311 (ext. 143) FAX: 708-388-3341
Email: techwest@petersonemp.com

Look at the LCD display directly over the button labeled 2. AUTO will automatically detect the note you are tring to tune. MAN (manual mode) will only respond to the note it is currently set to detect.

If your tuner is set to 'MAN', simply pressing the Auto/Man button again will toggle you back into manual mode.

If it still seems as though your tuner is having difficulty tracking in 'Auto' mode, there could be a problem with either the built-in microphone or the input jack.

If you usually tune with the built-in microphone, attempt to send a tune-able signal into the input jack with a standard guitar cable or a microphone with a 1/4" connector. If you are able to track a note using this method, then one of the following two scenarios applies: 1.) Your built-in microphone is malfunctioning and you need to open a Help Ticket to service your tuner. 2.) You do not have a loud enough signal for the microphone to pick up, and you may consider the use of a tuning pickup such as the Peterson TP-2.

If your tuner still does not respond to a hard-wired signal, please open a Help Ticket in order for us to service your product.

The following video shows this process using a StroboPLUS HD.