![]() Conversely, if you set the vernier to 12 cents low, when you play your not a major third below and see the ring stop moving, you'll be playing the note in tune with equal temperament. This is an artifact of equal temperament and the harmonic series, so if you play your note 12 cents sharp, that ring will stop moving, because you will be fitting in the just intonation of the major third. Interestingly, when playing the major third below the note the selector is set to, you will see one ring telling you that you're playing flat, even if you are playing the correct pitch. Because the motor speed has to be precisely controlled to measure against a fixed reference, you have to change the note dial (centermost large dial) when tuning other notes, but because the harmonics show, you can still get good tuning information on the perfect fourth and fifth of whatever note the tuner is set to - the patterns will still be visible and will stop moving when the note is in tune. The rings on the disk match up to different sounding octaves, so the higher the pitch being measured, the higher up on the disk the pattern will seem to slow or stop moving, and because the tuner measures all of the incoming audio, you will typically see multiple rings looking active - higher harmonics in the sound will show, usually more faintly, on the other rings of the tuner disk. If the markings are moving to the left, your note is flat, if they are moving right, your note is sharp, and if they appear but are not moving at all, you are perfectly in tune. You set the note you want to play, make sure the vernier knob is set to the right reference pitch, and then play your note - when close to the right pitch, you will see some of the markings on the disk get darker. It sounds complicated, and I suppose it is, but the circuitry involved is comparatively much simpler than other electronic tuners, so when electronics were comparatively primitive, it could be an extremely accurate instrument without too much electronic complexity. This is the same sort of effect you can see watching a video of a driving car's wheels, where the wheel seems to rotate quite slowly, but in this case, the designers have done all the math needed for the speed of the motor and the patterns on the disk to look like they stop moving when the incoming audio frequency is in tune. When the rotation speed of the disk, which has its speed precisely governed by a separate circuit, and the speed of the flashing of the light match up in the right way, it looks like the markings on the disk are moving very slowly, or not at all. What that means is that a strobe tuner converts an audio input into a blinking light - neon lamps in this one - and shines it on a wheel with patterned markings that a motor is spinning at a constant speed. How a strobe tuner works: A strobe tuner, at least traditional ones, is an electromechanical tuner that relies on the strobescopic effect (surprise surprise!) for its display. I replaced a few parts, made a couple modifications, and added an internal mic to make it quicker to setup and use. I hope just memories sake Petersen will bring it back in it's original Conn format.let the ego goon who made what just bring us back this quality instrument known as the Conn st11 remade by Petersen tuners for the generations to come.when a product was proven great many will still follow and support and believe in just like a iconic brand story of Indian motorcycle company.Both should be treated as a pho enix that rose from it's ashes with the love of man kind to lift it up to rebornagain to serve the masses as a cheerish brand.In developing my own precision tuner and being interested in strobe tuners, I found a working-but-needs-refurbishment Peterson Model 400 inexpensively on ebay, so I bought it with the intent to fix it up, calibrate it, and use it. ![]() Headstock strob tuners are portable but not on spec mark of complete tuning.Conn is legendary IAM happy the right company Petersen took it over. Growing up see it on stage and reharsal spaces as well as guitar repairmen benches. ![]() First of it's kind for this strob method of tuning. If working properly a most effective tuner very right on the mark. This unit was damaged but will be reworked.
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