2. analog
  3. 1298008759

ca 640p + thorens TD-160 +at150MLX+ Revox A720

Hello everyone
I have a Thorens TD-160 mark II and a cambridge audio 640p . I have done quite a bit of research for the right cartridge and when I listened (on the net only unfortunately) to the AUDIO TECHNICA AT-150 MLX I was really impressed ! Different class this cartridge ...I would like to get it and although I tried to calculate stuff for compliance I am not quite sure I know what I am doing .At the moment the 640p is connected to my sl1200 mark II with a ortofon nightclub s cartridge which is 6.0mv output .With this combination through my Revox preamp is very loud ,I only have to put the volume at 1 or 2 and it produces quite a loud and full signal .What would happen with the thorens and at150?Thorens has a light arm.Thank u
hungrygorilla
johnnyb53
3,510 posts
 
You can view the cartridge/arm chart for the AT150MLX here. It looks like with the 8.3g AT150MLX on an arm with 7.5g effective mass, the resonant peak is 13 Hz, which is a little high. If you could increase effective mass by 4 to 5g, it would lower the resonance to 11 Hz which is more in the ideal zone. If you combine this 3g headshell weight with these special 2g headshell screws it'll take your arm's effective mass into the sweet zone and lower the resonant frequency to 11g.
hungrygorilla OP
5 posts
 
Thank you once again johnnyb53 for your advice ! I studied what you said and now I understand your initial figures ! The figure of 13hz which would be too high is the average mass between the arm and the cartridge . I am happy that with a little weight the thorens should be ok with the at150 ! So I guess before I get the stuff you suggested I could just put a 5pence coin which is exactly 5gr place it on the headshell and it would meet reasonance of 11Hz ,right ? Thank you for your help .
johnnyb53
3,510 posts
 

02-21-11: Hungrygorilla
...I am happy that with a little weight the thorens should be ok with the at150 ! So I guess before I get the stuff you suggested I could just put a 5-pence coin which is exactly 5gr place it on the headshell and it would meet reasonance of 11Hz, right ?
Yeah, that should pretty much work the same. You could use some Blu-Tack to secure the 5-pence to the headshell. You will want to center the coin as well as you can. If it's too off-center I'd think that the uneven pressure could strain the bearings a bit or affect the azimuth alignment.
hungrygorilla OP
5 posts
 
Yes ,thank you johnnyb53,I will place it in the carefully in the middle . The cartridge should be here in a couple of weeks , the only thing that worries me is fitting the cartridge myself ....I can balance the tonearm and adjust the weights well but this is gonna be a first to do the protractor alignment .Does the AT150 come with protractor ? I checked online and it does seem too difficult to do but being a gorilla you know ...do you think I should take it to be done professionally ? Thank you all !
hungrygorilla OP
5 posts
 
Yes ,thank you johnnyb53,I will try to place it right in the middle . The cartridge should be here in a couple of weeks , the only thing that worries me is fitting the cartridge myself ....I can balance the tonearm and adjust the weights well but this is gonna be a first to do the protractor alignment .Does the AT150 come with protractor ? I checked online and it does seem too difficult to do but being a gorilla you know ...do you think I should take it to be done professionally ? Thank you all !
More to discover