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Post by thevictrolaguy on Jan 19, 2014 0:20:45 GMT -5
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Post by dddave on Jan 20, 2014 7:56:23 GMT -5
I highly recommend these. I was surprised to see the price; I paid $25 a few years ago for the same one. Dave Jolley
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Post by wagnerian on Jan 21, 2014 6:21:20 GMT -5
I agree, I can highly recommend them and they seem to be getting cheaper by the day. Here in the UK we can buy them for about £9.99 including postage from various sources on E-Bay. They are brilliant and can adjust to any speed you require, so no more faffing around with stobe discs.
TW-W
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Post by refseries on Jan 29, 2014 4:38:16 GMT -5
Agreed. I have used mine for two or three years (and watched the price fall like a stone since I bought them!) and found them invaluable when setting up a phonograph but have found one issue with these things. If you make a sleeve to put on thbe madrel with one reflector on it, the tachometer will give a readout of the mandrel rpm. However this will wander quite a lot as the sampling time of the tach is being pushed a bit if it reads one pulse every 2.6 seconds. You will get a better result if you put ten reflectors on the sleeve, ie one every 36 degrees. This should give a reading of 1600 when the speed is right, but as the tach is now getting more samples the reading doesn't wander as much and is easier to use. The same idea can be used for a disc for checking turntables.
Hope this helps
Keith
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Post by nh4012 on Jun 4, 2014 12:56:30 GMT -5
I'm about 90% complete in my 21st century Edison phonograph construction project. As I was nearing completion I realized that I wouldn't be able to set speed by ear because I wanted 4 speeds: 120 & 160 rpm for 2 and 4 minute records and 60 & 80rpm for half speed operation to digitize out of round records for later digital speed doubling. A quick search of eBay turned up the $12.95 laser tach and it's just what I needed. That was about a year ago and I still haven't finished the project, mostly because I haven't found a source for 0.1mm ruby or sapphire balls for "stylus" tips.
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Post by nefaurora on Aug 17, 2014 23:40:19 GMT -5
I have two of these Laser tachometers and I highly recommend them! I think that I paid $25 for both of them off of ebay.. ) Tony K.
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Post by nefaurora on Aug 17, 2014 23:50:57 GMT -5
PS: I have found a great tip, When adjusting the phonograph speed to 160rpm, Make sure that when you do it that you adjust for 160rpm while the phonograph has a clean cylinder on it (make sure that it is a spoken voice cylinder, not all instrumental) and is playing the cylinder at the same time that you are adjusting the speed with knob or screwdriver, etc.. It takes everything into account, cylinder drag, slack, and it will play perfect every time! So actually, when the cylinder is off and the phonograph is playing.. It is actually running somewhere at 161/162 rpm's...believe it or not. ) Tony K.
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Post by n2wheelies on Aug 3, 2015 13:30:59 GMT -5
+1, these work great !! Thanks Benjamin
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borrilabs
Junior Member
"The Crazy ""Misguided Hobbiest"" who dared to make authentic cylinder records with spiral cores.
Posts: 57
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Post by borrilabs on Sept 9, 2015 6:04:02 GMT -5
These work great! I had used a digital tachometer as far back as the 1990s for setting the speed on the phonograph.
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Post by phonoboy on Sept 12, 2015 21:38:52 GMT -5
PS: I have found a great tip, When adjusting the phonograph speed to 160rpm, Make sure that when you do it that you adjust for 160rpm while the phonograph has a clean cylinder on it (make sure that it is a spoken voice cylinder, not all instrumental) and is playing the cylinder at the same time that you are adjusting the speed with knob or screwdriver, etc.. It takes everything into account, cylinder drag, slack, and it will play perfect every time! So actually, when the cylinder is off and the phonograph is playing.. It is actually running somewhere at 161/162 rpm's...believe it or not. ) Tony K. I adjusted mine by ear, using the introduction at the beginning of an Edison 2min.
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borrilabs
Junior Member
"The Crazy ""Misguided Hobbiest"" who dared to make authentic cylinder records with spiral cores.
Posts: 57
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Post by borrilabs on Sept 13, 2015 15:37:18 GMT -5
Phonoboy that is correct. Also when adjusting recording machines, a lot of drag on them, especially studio recorders that are much heavier than home recorders.
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