Go Back   Home > Forums > >

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

DIY linear tonearm
DIY linear tonearm
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools
Old 27th January 2021, 01:24 PM   #4241
2A3SET is offline 2A3SET  Canada
diyAudio Member
 
Join Date: Dec 2003
Location: Toronto
Good to see lenco and TA here, this is my third lenco and linear tonearm.
Thinking about the LC mkiii now hopefully to beat the rs-lab.
Attached Images
File Type: jpg lc.jpg (128.8 KB, 178 views)
  Reply With Quote
Old 27th January 2021, 04:04 PM   #4242
Mike56 is online now Mike56
diyAudio Member
 
Join Date: Apr 2020
Quote:
Originally Posted by 2A3SET View Post
Good to see lenco and TA here, this is my third lenco and linear tonearm.
Thinking about the LC mkiii now hopefully to beat the rs-lab.
Great to see you on the thread and to see what you are doing.
We look forward to seeing more as you move on.
I would reach out to Carlo and see what feedback he gives you as well.
He has done so much work and development he has surely forgotten more than i know and can guide you if you tell him what youre aiming for.
My experience is short and limited but theres great feedback to be had and it gives you the opportunity to check things through carefully rather than rely on intuition or just one experience.

I am just starting on the Lenco and will try to do that like the arm, work rather than cost!
__________________
PC, to Chordette GEM DAC or O.L. Aurora 4 with Home built Radial LTA or OL Onyx arm Rega Ania to Graham Slee MC pre, to Prima Luna Prologue 1. Troels Gravesen Fusion BAD with Hypex 151's high level input
  Reply With Quote
Old 27th January 2021, 04:20 PM   #4243
Mike56 is online now Mike56
diyAudio Member
 
Join Date: Apr 2020
Quote:
Originally Posted by jw67 View Post
This is an excellent article which might help in choosing materials if you havenít seen it already.
https://qualia.webs.com/plinthbuilding.htm
Interesting article and many thanks Jonathon for those various thoughts. i am going to read quite a lot before i start this one!
Quote:
Originally Posted by jw67 View Post
My mindset was if you could build a very good deck for almost no money, is it possible to build a massively high performing deck with a relatively modest outlay in comparison with spending £10,000 upwards.
A very similar thought process to mine, but i am much more stingy than you!
Of course that doesnt mean it can be done, but i will have a go.
I hope to test out the theory/guesswork on here so look forward to your feedback!

Quote:
Originally Posted by jw67 View Post

Itís all a journey and fun discovering. If you havenít discovered it yet lenco heaven is a great resource, there is also a fb group which is extremely good.
Jonathan
I agree with that, great fun, even making mistakes as often as i do!
Mike
__________________
PC, to Chordette GEM DAC or O.L. Aurora 4 with Home built Radial LTA or OL Onyx arm Rega Ania to Graham Slee MC pre, to Prima Luna Prologue 1. Troels Gravesen Fusion BAD with Hypex 151's high level input
  Reply With Quote
Old 27th January 2021, 07:25 PM   #4244
jw67 is offline jw67
diyAudio Member
 
Join Date: Aug 2017
Quote:
Originally Posted by 2A3SET View Post
Good to see lenco and TA here, this is my third lenco and linear tonearm.
Thinking about the LC mkiii now hopefully to beat the rs-lab.
Looks great. Is that a Diy ptp type thing or a real one? Have you split the plinth? Iíve always been intrigued by that rs arm and never heard one. How does it sound in comparison with the linear one? Last question. What bearings do you use?
  Reply With Quote
Old 27th January 2021, 08:10 PM   #4245
2A3SET is offline 2A3SET  Canada
diyAudio Member
 
Join Date: Dec 2003
Location: Toronto
Quote:
Originally Posted by jw67 View Post
Looks great. Is that a Diy ptp type thing or a real one? Have you split the plinth? I’ve always been intrigued by that rs arm and never heard one. How does it sound in comparison with the linear one? Last question. What bearings do you use?
That's a diy ptp on 4mm alu plate.
The motor is serviced, and on a separate island cut out from the main plinth.
RS-A1 is more organic and fluent even though can hardly get balanced.
I am using the SPH long bearing.
  Reply With Quote
Old 27th January 2021, 08:30 PM   #4246
jw67 is offline jw67
diyAudio Member
 
Join Date: Aug 2017
Thanks. If I were to build another one Iíd do a Diy ptp as well.

Interesting re the arm. They are quite a rare thing.

Bw
  Reply With Quote
Old 27th January 2021, 08:42 PM   #4247
warrjon is offline warrjon  Australia
diyAudio Member
 
Join Date: Feb 2011
Location: Terang Vic
@jw67,

Bearings are a good point. My first LTA used 623's and found the arm miss tracked with the Stanton 881s, I made a lets call it a tyre from 316 stainless to increase the OD of the wheel to 19mm even though it added mass it stopped the miss tracking once I got the wiring sorted.

The larger the diameter of the wheel the lower the starting torque required to get the carriage moving.

Magnet wire works well I buy mine from RS Components as it not much more expensive than eBay.

I also like the way your LTA is mounted both sides which add stability. I measured the Pyrex rods and found them to vary in thickness and they were not concentric.

You can buy HSS or linear rails in 6mm these are far better than the glass and for the price IMO better than carbide. The carbide rods I bought were expensive and not straight.
  Reply With Quote
Old 27th January 2021, 10:25 PM   #4248
jw67 is offline jw67
diyAudio Member
 
Join Date: Aug 2017
Very interesting about the bearings. I think earlier in the thread niffy had mentioned inside 3mm outside 10mm and a width of 4mm. I am going to order some of those but I was worried about the width with the 2 6mm rods. A company sent me some 5mm width ones by mistake and they had nowhere near enough the right vertical movement, maybe 4mm is ok.

I spoke to a company that produced quartz glass rods yesterday . The MD asked me to call him as he was interested in the project and talked me through the different types of glass...none are round and all have a deviation(maybe not synthetic quartz but prohibitively expensive) The only way to get it completely straight is to grind it but then you have to flame glaze it to get it smooth and then youíre back to not straight. He picked me out 4 rods with a 0.2mm deviation and sent them free. Iíll see how they go but they feel a lot better than the current rods.

I havenít come across hss linear rails, Iíll definitely look into that thanks. I had thought of carbide but your experience rules that one out.

The magnet wire came today, it is thin. They apparently sell it to audio companies to make transformers, chokes, speakers etc. 99.99 we shall see. It looks like the right thickness though and it sounds like the quality is ok. What a cheap way to get Tonearm wire..bargain.
  Reply With Quote
Old 28th January 2021, 02:19 AM   #4249
warrjon is offline warrjon  Australia
diyAudio Member
 
Join Date: Feb 2011
Location: Terang Vic
Linear rail - I bough these to try them, they have not arrived yet but they do spec for straightness.

Dia 4mm-22mm Cylinder Rail Linear Shaft Smooth Rod Optical Axis Various Lengths | eBay

6mm rail with 4mm wide bearings are correct according to Niffy's research. This is what I used for my first rail. Current rail uses pin bearings 4mm carbide rods and 2mm wheels.
  Reply With Quote
Old 28th January 2021, 02:52 PM   #4250
Mike56 is online now Mike56
diyAudio Member
 
Join Date: Apr 2020
Quote:
Originally Posted by jw67 View Post

The magnet wire came today, it is thin. They apparently sell it to audio companies to make transformers, chokes, speakers etc. 99.99 we shall see. It looks like the right thickness though and it sounds like the quality is ok. What a cheap way to get Tonearm wire..bargain.
Did you find niffy's "instructions" ok?
I solder it around 400c to make sur that the enamel burns off at the joint, i soldered up one set at 370 and got no connection, very disappointing .............
__________________
PC, to Chordette GEM DAC or O.L. Aurora 4 with Home built Radial LTA or OL Onyx arm Rega Ania to Graham Slee MC pre, to Prima Luna Prologue 1. Troels Gravesen Fusion BAD with Hypex 151's high level input
  Reply With Quote

Reply


DIY linear tonearmHide this!Advertise here!
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Linear tracking tonearm vs. Pivoting tonearm Don Nebel Analogue Source 5 31st May 2015 04:55 AM
Another DIY Tonearm johnmarkp Analogue Source 0 22nd April 2008 12:07 AM
my DIY Turntables and DIY tonearm Roger Waters Analogue Source 57 22nd January 2008 07:05 PM
Magnetic suspension linear-tracking tonearm? Shaun Analogue Source 5 4th June 2003 11:21 PM


New To Site? Need Help?

All times are GMT. The time now is 10:07 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki