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TURNTABLE SETUP Questions thread - don't start a new thread, ASK YOUR QUESTION HERE! - Page 116

post #1726 of 2542
Quote:
Originally Posted by penmarker View Post
 

 

I read about this somewhere in the speakers section. One fellow has a musician friend, and his speakers are suspended from the ceiling with piano wires, and they're one of the best setups he has ever heard. Maybe not in the speakers section, but definitely somewhere here in head-fi.

 

Please post pix, if you happen to recall... thanks!

post #1727 of 2542

Idea is as old as the hills. You can use fishing thread, piano wire, rope, etc,etc . The material affects vertical resonant frequency and damping, in horizontal sense it is always the same given the same lenght of the thread(s), being the physical pendulum which has its resonance defined by lenght alone. Resoant frequencies in the region of 1 ( in word : one ) Hz are possible with careful selection of variables. The lower the resonant frequency, the better the isolation. The lower the cross section of whatever material between the supporting surface and object suspended, the better the isolation. 

post #1728 of 2542

Anyone want to provide us with dangling pix for examples? This is interesting...

post #1729 of 2542
Quote:
Originally Posted by Silent One View Post
 

Anyone want to provide us with dangling pix for examples? This is interesting...

 

It is in my "future projects" - for at least 20 years...

 

Since I use 4 "absolute spirit levels" ( linear tracking air bearing ET2, Transcriptors Vestigal, Well Tempered and an unique unipivot arm, all of which rely on gravity/perfect levelling ) on my research/development table, it HAS to be level. Spring subchassis suspended table would be too much asking for trouble with so unforgiving setup.

 

As I live by the railroad, entire BUILDING vibrates - to the point that first time visitors are liable to in panic ask if there is an earthquake going on. I got so used to it that my threshold of "earthquake" has diminished. Once, when there WAS the real thing, Vestigal arm had to alert me to the above average movement - it started skipping -  I was among the last persons that fled outside...Fortunately, earthquakes here are far and in between.

 

I plan to record at least better vinyl to DSD ( at least 1K LPs )  - and within one side of an LP there can be 4 "earthquake" train passings with no or lesser supports. Lacking funds to get an air support proper, dangling the TT is the only real answer to the problem - short of moving.

 

Hopefully soon enough...until then, I can not post any pics, can I ?

post #1730 of 2542

Out here in Cali, when tremors wake and quakes shake, we just kinda roll with it. Will try a search engine (G?) after lunch to see some images of audio suspension. Hate to hear about your location challenges. On the bright side, I bet it made you a better recording engineer.:wink:

post #1731 of 2542
Quote:
Originally Posted by Silent One View Post
 

Out here in Cali, when tremors wake and quakes shake, we just kinda roll with it. Will try a search engine (G?) after lunch to see some images of audio suspension. Hate to hear about your location challenges. On the bright side, I bet it made you a better recording engineer.:wink:

 

this is why i really really really like linear turntables, in particular the technics linear turntables. they're heavy, don't skip, even when i slam on the table.

post #1732 of 2542

That is why I am working on Technics linear trackers for the past decade or so. With SL10/15/7, you can lift the thing while it is playing +18 dB 300 Hz tracking test off HFN test record, rotate it in the air in any position connecting cords would still allow, with nary a hiccup - let alone skipping. That 115 mm effective lenght arm must be one of if not THE most stable tracker in the world.

 

Other than that, Technics linears share all the teething troubles with the rest of Technics gear. Where they saved a couple of cents in order to make production cheaper, made lots of $$$$ to be burned down the drain in order to make them behave like they should from the start.

 

If you go to my Sleeping Beauty post, you can see use of squash balls as a pretty decent decoupling/suspension for Technics decks. It should also work with 1210. It nearly passes my "earthquake train" test.

post #1733 of 2542
Quote:
Originally Posted by analogsurviver View Post
 

That is why I am working on Technics linear trackers for the past decade or so. With SL10/15/7, you can lift the thing while it is playing +18 dB 300 Hz tracking test off HFN test record, rotate it in the air in any position connecting cords would still allow, with nary a hiccup - let alone skipping. That 115 mm effective lenght arm must be one of if not THE most stable tracker in the world.

 

Other than that, Technics linears share all the teething troubles with the rest of Technics gear. Where they saved a couple of cents in order to make production cheaper, made lots of $$$$ to be burned down the drain in order to make them behave like they should from the start.

 

If you go to my Sleeping Beauty post, you can see use of squash balls as a pretty decent decoupling/suspension for Technics decks. It should also work with 1210. It nearly passes my "earthquake train" test.

i never managed to find those posts, could you direct me?

post #1734 of 2542
Quote:
Originally Posted by CH23 View Post
 

i never managed to find those posts, could you direct me?

Starting with http://www.head-fi.org/t/549616/post-a-photograph-of-your-turntable/1410#post_9241645

post #1735 of 2542

Alas, my intermittent high-pitched hum has returned, as random and maddening as before.

Bought new cables in case my old ones were the problem. Turns out they were not, but I did notice the turntable's left-channel RCA plug offered a very loose fit.

Could the cable slightly slipping off cause my intermittent hum? I did notice fiddling with it seemed to help.

Any way to deal with the plug's loose fit that doesn't involve sending the turntable back where it came from?

post #1736 of 2542
Quote:
Originally Posted by Mrtn77 View Post
 

Alas, my intermittent high-pitched hum has returned, as random and maddening as before.

Bought new cables in case my old ones were the problem. Turns out they were not, but I did notice the turntable's left-channel RCA plug offered a very loose fit.

Could the cable slightly slipping off cause my intermittent hum? I did notice fiddling with it seemed to help.

Any way to deal with the plug's loose fit that doesn't involve sending the turntable back where it came from?

Ever heard of pliers? You can practice on some cheapo RCA, best to use is some thin rubber/plastic between RCA minus and pliers, so that cosmetics will remain unscaved.

 

I hate the godamm RCA connetors, they are not spec'd tight enough and specially with phono CAN cause erratic behaviour like you describe.

 

With RCAs, there is an infinite possibility of either minus (screen connected to ground ) or plus (signal) being either totally "in the air" or have much higher resistance than it should have. Reason is dimensions of males and females are simply too  loosely specified. Now if anyone will bring WBT Next Gens up - it will simply show he/she has money to burn. With over 200 $/Euro per MONO connection (male + female) that is simply out of reach for the vast majority. Simply count the RCAs on the back of your (pre)amp, mulltiply by the above price, add labour - not exactly appealing proposition.

 

No wonder few manufacturers recently started to offer DIN terminated cables for phono - much better executed than vintage DIN monstrosities that gave them bad name. They also by default are well shielded - NOT like RCAs having minus/ground totally exposed. No conductor is without resistance and that minuscule resistance can (and DOES) lead to hum pickup, RFI, and other things you would like to omit at all costs.

 

Everything above is especially critical with low impedance low output moving coil carts. I use Ortofon MC100/200/TMC200 cart with 0.09 mV (correct, less than 0.1 mV ) and 3 ohm internal resistance for both turntable wiring as well as phono preamp testing. If it is quiet with this one, it will be more than quiet with more normal setups.

 

Now imagine Audio Note IO Limited cartridge  ( with electromagnet instead of permanent magnet of its lesser versions ) - 0.04 mV and IIRC 2 ohm ...

post #1737 of 2542

I went to turn on my turntable the other day and to my dismay the motor no longer works! :( It's a Music Hall MMF 7.1 turntable. I googled for a replacement and the only thing i found was from Needle Doctor for $165. Yeah...that's not going to happen. So the DIYer in me pulled the motor apart and found this nomenclature (pic below). Does anyone by chance happen to have one of these lying around I could buy off you, or could someone direct me to where I could buy one? Thanks in advance.

post #1738 of 2542

:( That's some bad luck right there! I know you were just fixin' to spin some vinyl, as you stretched that solid core cable from listening room to the door knob down the hallway. I'm still looking to bust my MMF-7 outta the closet!

post #1739 of 2542
Quote:
Originally Posted by Silent One View Post
 

:( That's some bad luck right there! I know you were just fixin' to spin some vinyl, as you stretched that solid core cable from listening room to the door knob down the hallway. I'm still looking to bust my MMF-7 outta the closet!

Yeah, it's always something isnt it? :(

post #1740 of 2542

Hey everyone been reading through the thread and am sort of interested in getting a starter vinyl rig.  My only concerns at this point are the costs of new albums and finding music in general.  I don't want to spend a chunk of change on a setup to find I can't find music that interests me on vinyl.  Did anyone else have this concern before getting into vinyl?  

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