Its funny how the tiny, inexpensive and humble Phoenix Roadrunner is embarrassing the industry’s Emperors....it should come with the warning: Do not use ... for your peace of mind ...
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The necessity for absolute tt speed control
- Thread starter spiritofmusic
- Start date
Yes Bill is very talented, i did consider VPI and Walker solutions but finally decided on Phoenix.
https://sotaturntables.com/product-category/eclipse-series/
Bill has licensed his products to SOTA, ask him why
For once Lagonda has a hot picture that has to do with audio
It’s a Mongrel TT with inspiration from Walker and add -ons stolen from DDK and Micro-Seiki
he has licensed his products to SOTA at no charge because he wanted to see the state of the art advanced in turntable motor control and SOTA was the only mfr he had spoken with, that had the competence - according to him- to further his vision (Although he was approached by several others).https://sotaturntables.com/product-category/eclipse-series/
Bill has licensed his products to SOTA, ask him why
Mike,
Do you realize you are also describing the intrinsic "problem" of the control system of your isolation active tables or of our reel to reel tape decks?
It's a shame that this tt drive system can't be modified to rim drive. I'd have certainly been very interested.
Just purchased a couple of Studer motors for potential TT upgrade. One is a real freaky version made for Phillips test department.
Most Studer capstan motors are Papst three phase synchronous motors with an integral tachometer - plenty of choices for the drive electronics!
Yes, and this is all your idea Fransisco ! I will contact you again once it lands. Looked at the diagram for the Studer A 80, you where right it’s running on 130 V. I had already purchased A 810 motor from Israel when i found this beast in Holland. Luckily the seller let me cancel the sale. Where did you get the special lubrication for the capstan bearing ?Please don’t say Nagravox in Australia ! I ordered but, the 70$ purchase was to small, so they refunded and canceled
I have tried these motors for a turntable. As they all have external rotors I found them quite noisy with a constant whooshing sound. This is OK in the depths of a mastering machine but not really in a turntable.The bottom left motor was used by the manufacturer in one of my broadcast turntables. I have had 4 of these motors fail, all in the same way. They are really old so the varnish on the coil wirings cracks , causing the motors to burn out. Just my experience. You may get different (hopefully better) results.
Also note the failed motors were all the Papst model bottom left. The others are from various Studers and virtually indestructable-provided you don't attempt disassembling one!
These are from the failed experiments box, hence the dirt.
There are a number of oil suppliers on eBay. Google sintered bearing oil.
Also note the failed motors were all the Papst model bottom left. The others are from various Studers and virtually indestructable-provided you don't attempt disassembling one!
These are from the failed experiments box, hence the dirt.
There are a number of oil suppliers on eBay. Google sintered bearing oil.
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That sounds scary, i should have waited for Micro to finish his experiment ! The noise is not a problem, i sit far away from the TT.I have tried these motors for a turntable. As they all have external rotors I found them quite noisy with a constant whooshing sound. This is OK in the depths of a mastering machine but not really in a turntable.The bottom left motor was used by the manufacturer in one of my broadcast turntables. I have had 4 of these motors fail, all in the same way. They are really old so the varnish on the coil wirings cracks , causing the motors to burn out. Just my experience. You may get different (hopefully better) results.
These are from the failed experiments box, hence the dirt.
There are a number of oil suppliers on eBay. Google sintered bearing oil.
What did you use for power control ? Thank you for the advice on the oil
Found and ordered !
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Yes, and this is all your idea Fransisco ! I will contact you again once it lands. Looked at the diagram for the Studer A 80, you where right it’s running on 130 V. I had already purchased A 810 motor from Israel when i found this beast in Holland. Luckily the seller let me cancel the sale. Where did you get the special lubrication for the capstan bearing ?Please don’t say Nagravox in Australia ! I ordered but, the 70$ purchase was to small, so they refunded and canceled
If it is a later ball bearing motor it does not need lubrication. Otherwise it can be the famous Isoflex PDP65 - cheap and easy to get in Europe. https://www.reelresilience.co.uk/product-page/isoflex-pdp65-lubrication-oil-10ml.
I have tried these motors for a turntable. As they all have external rotors I found them quite noisy with a constant whooshing sound. This is OK in the depths of a mastering machine but not really in a turntable.The bottom left motor was used by the manufacturer in one of my broadcast turntables. I have had 4 of these motors fail, all in the same way. They are really old so the varnish on the coil wirings cracks , causing the motors to burn out. Just my experience. You may get different (hopefully better) results.
Also note the failed motors were all the Papst model bottom left. The others are from various Studers and virtually indestructable-provided you don't attempt disassembling one!
These are from the failed experiments box, hence the dirt.
There are a number of oil suppliers on eBay. Google sintered bearing oil.
Sorry, fortunately I have to disagree on all you said.
If the capstan motor produces a whooshing noise it would result in miserable sound and poor measurements. Well cared Studer capstan motors (something that happens less frequently than people think) are completely silent - happily Fred Thal is not reading this thread ... BTW, poor mecanical adjustment of the tachometer assembly will result in the type of noise you refer, we need a scope to adjust it properly.Surely the quality of the movement also depends a lot on the controller,
You describe motors that seem to have been taken from waste and two of them look like reel motors, not capstan. And the Studer capstan motors can be disassembled provided we know how to do it and no one with proper knowledge has tried to it before.
It is a Maplenoll Ariadne Signature with extra SS platter added to the original lead platter for a total of 100lbs. Original it comes with the air bearing LT arm with silicone trough in front of the cartridge, i have added a SME 3012R on a MicroSeiki type attachment custom made by my local toolmaker. It is currently controlled and monitored by Phoenix Tach and power supply, what is going to happen in the future is still unknown. Maybe i will get help from Bill Carlin of Phoenix Engineering
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