#Peterson 420 strobe tuner how to#
#Peterson 420 strobe tuner pdf#
#Peterson 420 strobe tuner plus#
#Peterson 420 strobe tuner professional#

#Peterson 420 strobe tuner professional#

Construction is solid and professional quality, and the pedal has metal screw lugs that let you fasten it securely to a pedal board, a feature that should be standard on all stomp boxes these days.

#Peterson 420 strobe tuner plus#

It also offers 25 “sweetened” tuning presets optimized for electric, acoustic, alternate-tuned, 12-string, resonator, bass and guitars that feature the Buzz Feiten tuning system, plus it has space for your own custom tunings. Reference pitch can be calibrated from A=390 to A=490 (compared to the A=435-445 range of most competitors), which makes it ideal for the growing number of guitarists who prefer A=432 over A=440. Like Peterson’s high-end units, the Stomp Classic is accurate within 0.1 cents, making it five to 10 times more accurate than other pedal tuners (most of which are accurate to. Vintage Rare Peterson Strobe Tuner Model 420 298 48 price drop 250 Used Mint Peterson StroboClip HD High Definition Clip-on Strobe Tuner Bundle with Boss TU-10 Clip-on Chromatic Tuner 109.98 Brand New Free Shipping 30-Day Return Policy Peterson Strobe Tuners Strobo Plus HD Color Guitar Tuner Free Shipping in the USA 249. I'd hold the test until I got some protection in place if I were you, but maybe you like toast better than me.The heart of the Stomp Classic is its large, half-circle backlit LED, which provides exceptionally accurate and easy-to-use “spinning wheel” tuning feedback, even in darkness or direct sunlight. I've seen poor design before, and I would've put a zener across their power supply if this thing turns out to work at all.Įdit: the 470 ohm resistor will drop sufficient voltage at only 9mA total, and each IC draws an average of at least 10mA, so that's the explanation why it lasts. I doubt any other version or type would stand 25V (for very long).

#Peterson 420 strobe tuner pdf#

If you Google the IC and take a look at a pdf datasheet you'll see an image of the IC. If you connected those caps to ground or in parallell it could explain the overload. The resulting total capacitance is thus half of each section (5 uF) and it also becomes a bipolar capacitor (meaning it can stand Alternating Current). That makes it a series connection of the two 10uF caps. In the diagram the wires are only connected to the upper two terminals, nothing to the common terminal. If you disconnected the ground wire and measured infinite resistances to the frame then that (together with the other equal resistances) is a good sign that the motor is ok. i'd like to be able to confirm if the motor is alive or dead if anyone has any tips for that, or any other reccomendations. In any case, if anyone could point me in a good direction that would be great. i don't really know what it should look like or if it could be frying transistors.

on the scope the signal looks like a spike up and then down. The other thing i'm not sure about is the signal coming in from the tuning circuit.

#Peterson 420 strobe tuner how to#

however bot coils are not open and have the same inductance so i'm not certain how to confirm that its dead. What i'm considering now is either that the motor is dead. with the motor board removed everything is stable and seems good. i can't really make any voltage reading on the motor board because it seems like it would start a small fire. everything else on that board seems to be just fine (although i'm not too sure about how to test the flipflops properly but all three share the same resistance readings). tried replacing them but they just toasted again. the MJE711 was burnt out and the 3.3ohm resistors were testing high. Naturally i began looking at the motor control board.

the motor lookls like its trying to turn over but just moves about a quarter inch but does not spin.

the strobe lights are on and respond to an input. the power supply seems to be giving the right voltages. here's whats going on and what i know.Įverything seems to work except the motor. i'm trying to get a broken peterson strobe tuner model 400 working again and have hit a bit of a wall.