Knowledge Base
Frequently Asked Questions
How do I read a strobe display?
Adjust your instrument until the pattern is as close to still as possible. Strobe displays are 'real-time' and extremely high definition. They require very precise 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.
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Is the accuracy the same for all Peterson tuners?
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Does my tuner require calibration?
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.
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What is my tuner’s Sweetened Tunings feature all about?
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Is there a carrying case available?
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Which Peterson products work with Peterson Connect?
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I often tune my acoustic instrument in a loud environment. What's available to help with that?
For instruments with a flat resonating surface, you can use a suction cup tuning pickup to reduce ambient noise interference.
A Peterson TP-3 clip-on tuning pickup is a very versatile device 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.
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How accurate is my tuner?
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How do I send my product in for repair?
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. If you have not registered your tuner, you must do so before returning it. Include a description of your problem. Please be specific about the type of malfunction as well as the conditions under which it occurs.
There is a minimum charge of $80.00 US plus a shipping charge for all Mechanical Peterson tuners received and a minimum charge of $40.00 US plus a shipping charge for all LCD Peterson tuners (unless subject to Peterson warranty). Payment options include PayPal, VISA, MasterCard, AMEX and Discover Card.
NOTE: For international (non-USA) repairs and for all Conn tuner repairs, a different procedure may apply. If you would like an advance estimate for service, you must include a request in writing with the tuner you ship.
Contact and Shipping Details:
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
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What should I do if my new Peterson product doesn't seem to work properly?
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What is the range of Hz calibration or Concert A calibration of my tuner?
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How do I find out how far out of tune my guitar is in cents?
The following video shows this process using a StroboPLUS HD.

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Not finding an answer? Open a support ticket for personalized support of your Peterson product.
Product Manuals
Not finding an answer? Open a support ticket for personalized support of your Peterson product.
Firmware History
StroboStomp LE Version 1.0.33
Wednesday, July 20, 2022 9:05:00 PM EDT
- Official Production Release