goatbreath wrote:I have a copy of HiFi News from 1959/60 where they use a ballpoint pen tip to make a uni pivot.It's one of the home constructor type articles.If they thought a needle etc..was better they probably would have recommended it..So I think the ballpoint is a great idea..Also as said on here earlier,,respect for your DIY attitude..
josephazannieri wrote:Yo JosM:
This arm looks really COOL in a futuristic, slightly evil way. What are measurements? I like the ball point pen bearing, and the balancing method where the arm is stabilized by having those additional weights below the arm.
Have you thought about how to wire it? You will probably need really fine wire so as not to impede the motion of arm. What are materials? Arm wire is available from many suppliers . You can make an antiskate device by using a weight and tying it to arm so that it pulls arm toward outside of turntable. I have replaced missing antiskate devices this way, and added it to arms that don't have it. Fine monofilament fishing line (6 pound or finer) with a clamp on weight will work and you can either add weights or change leverage to make it work right. Starting point is just enough weight so arm does not move in or out on a blank record when playing. You can adjust to minimize distortion.
I think it's cool, and you have more guts that I to attempt it. May you achieve something really cool looking, with an appropriate component of menace, that works great.
And good luck from that gutless old guy,
Rothwellaudio wrote:That tonearm looks great and it's inspired me to have a go at some point in the future (when all the other projects I have in mind have been completed).
Oracle_309 wrote:Guys, don't be so smitten. I've used something similar for over 2 years. This is a refinement of the Altmann DIY tonearm. A pen nib provides a very easy to get (and something that may cost you absolutely nothing to get hold of if you use pen that has run out of ink). The headshell is but another of Frank Schroeder's designs which Clearaudio basically "knocked off".
If you go to http://www.diyaudio.com and do a search for "Nanook tonearm" you'll find a few pix as well. I'm not trying to take anything away from JosM, just that this is far from original.
The turntable however appears to be nicely built and is a thing of beauty.
BTW, I use no dampening what so ever with no issues. It does require careful attention to detail determining the correct height for the CofG of the counter-weight. I will guarantee one thing: the use of good 75ksi tubing is essential. There is a liveliness that is great and it requires no dampening. Better than my SME 309 or a hot-rodded Rega RB250.