Just make sure you disable "Fit to page" when printing it, otherwise it may not print at exactly the correct size, which will throw off the accuracy of the stroboscope.
A very good demonstration, thumbs up. I have recently bought a used harman kardon T25 turntable, semi-automatic belt drive from 1980s period. HOWEVER, I cannot see this speed! It comes with a stroboscope disc! I set up the hk T25, set tracking force, anti-skating number; bought all these tools from the Canadian Amazon; a couple I overpaid for shipping (USA). Anyway, I then checked Azimuth, VTA, cartridge alignment, all okay. Furthermore, I reset tracking force, a bit more, then anti-skating because the Neoteck force scale gauge indicated a bit more otherwise; set from 1.5g to 1.96g for Audio Technica AT70 phono cartridge. From the research I've done, there is no model number on cartridge like the Stanton cartridges. Going to buy a new stylus; bought an Audio Technica AT95E from ebay, plan on making a turntable, DIY project of accomplishment; a philosophy that I have. Anyway, I also reset the anti-skating, let platter run with stylus guard on. Got is to stand still. HOWEVER, I DON'T SEE THIS PATTERN OF BARS THAT ARE SUPPOSED TO STAND ALMOST STILL. I held a flashlight, LED flashlight, and during evening hours, and there is no actual bars to measure. What is going on? Maybe I'm doing something wrong, not looking carefully enough? There is this SPEED CONTROL dial to the right of the SPEED SELECTOR dial. To the right is a cut button. I got manuals from the vinylengine.com web site The hk T25 is belt drive. Thank you for any advice that can be given. And thanks for having the patience to read this long question.
Strobe disks are based on using a strobe light flashing at 120 hz or 100 hz for europe. A neon lamp, or fluorescent lamp operating on AC using a magnetic ballast is the only way to get this. Should be able to do it with an LED lamp that is driven with AC if you remove the filter cap, but not one that uses a high frequency pulsed supply like your flashlight.
@@12voltvids Thank you very much for your quick reply, and further instructions, and suggestions, 12voltvids. Yes, now I understand; thought maybe there was something dysfunctional with my turntable, besides myself. Thank you. I feel more confident; about playing back my records now. I am going to get a lamp shining at that small diameter stroboscope disc; and then completely have the turntable set up, ready to playback* some serious vinyl. *Playback; a term that I got from a book written, published in 2004 (?), that I borrowed from the public library several years ago. It explains the development, and business of recorded music.
These markings on the ION USBTT 10 platter are actualy strobe markings for 33.1/3 believe it or not. I calibrated mine with a strobe disc and its markings movement totally corresponded to those on the platter. Quite the discovery, it was just there in front of me all this time!
No it won't. You need the strobing of light at 120 hz, which is what only a plasma type of lamp can deliver as it pulses with the AC line frequency (100 hz for 50 cycle countries) You need to use an NE2 bulb, or a fluorescent lamp with a magnetic ballast. Compact fluorescent or LED will not work as they use an inverter which operates in the KHz range. An incandescent lamp is just a glowing wire so you won't see the strobe effect of the strobe disk. An LED can be used if it is powered by line AC through a dropper resistor so the bulb led will be flickering at line rate.
The result would have been much better if you had chosen Document Type as Photo instead of document. Also if you search for stroboscope in Google images there are a few ready to print out, that's how I made my own stroboscope disc, there are even images with both 50 and 60 Hz on the same disc.
I wish I could understand what you're looking at to say it's okay. What's stationary? What are you looking at and how does it register stationary? Thanks a lot.
James Bond first you need a light source that flickers with your ac line frqqency. a fluorescent lamp with a magnetic ballast works. you will see the lines appear to stand still when it it turning the correct speed. they will appear to rotate counter clockwise if slow and clockwise if fast. of course if you look under led light or incandescent or sunlight or a CFL or fluorescent lamp with electronic ballast it will just appear as a blur. it is the quickly strobing light that makes the image appear still like a timing strobe pointed at the crankshaft of a car engine to set the ignition timing.
Thats right. The other 2 were 2% faster and 2% slower than 33 1/3 so if it was fast the next band in would appear stationary, and if slow the outer one. A strobe light is what makes this work, so it needs to be done under a fluorescent lamp with a magnetic ballast or a neon lamp. Many turntables have the strobe ring engraved or printed on the platter itself, and have a neon bulb that shines directly on the ring so you can see at a glance if your speed is correct.
It doesn't come across on camera well due to the rolling shutter, but looking at it with the eye you will see it clearly. The low side will appear to rotate one way, and the high side the other and the correct speed the lines will appear completely still if going the correct speed or moving slightly if speed incorrect. The black and white stripes will be totally still as if it wasn't turning at all.
HI,, I realize this video is from a few years back,, but,, I was wondering if anyone has a circuit for the strobe that you need to shine on the strobe disk? Thank you.
@@terencekaye9948 yip neon bulb NE2 glow lamp and a dropping resistor. Perhaps I will make one up some day. I guess I better hang onto my old magnetic fluorescent ballasts.
Fantastic,, I have one of those.... I"m a big fan and Wanted to say,, Thank you for all your great(Amazing) Work and making videos,, I'm learning a great deal from you. :)
Never save any picture to jpg, it makes a mess of it. I use png or gif for schematics and png or bmp for pictures. If you use a paint program you can pinpoint the center before printing :-)
Picture format Compression is not like zip file compression, zip has to reproduce the actual file, every bit is like the original. A jpg makes the file smaller with mathamatical tricks and downgrading the photo in the process.
