| rbarna |
I'm looking for highres pictures of tonearms... I want to manipulate them digitally and print a giant poster to hang in my apartment.
If you give me the winning shot, I'll send you a copy of the poster... this is a big poster we are talking about here... approx value $300 to print.
Show me what you've got! artsy shots are appreciated!
Thanks,
Ross |
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| Bas Horneman |
Show me yours first!!!
Seriously now...can we send photo's we find on the net as well?
Or will only ones own photo's of ones own tonearm be eligble for the prize?
Regards,
Bas |
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| rbarna |
Both work for me! Go to it!
-r |
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| JasonL |
| How about this one. |
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| fdegrove |
Hi,
Here's my baby:
Cheers,;) |
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| Havoc |
| Think you need to check that link, the page has been eaten by a goat, no kiddin'. |
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| Daniel-A |
| how about this one! |
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| Variac |
| Is that some sort of computer goat-virus? ;) |
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| dice45 |
| quote: | Originally posted by fdegrove
Hi,
Here's my baby ....
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Hello Frank,
i had plenty of experience with this thing, i found that if i raise the air pressure to sonically desirable values then the slider tube tends to jam due to being pulled elliptical by the air pressure.
Otherwise i found it sounded quite good, better than i expected from the (weak looking) structure.
What i don't find alltoo desirable (as with any commercial tonearm) is that if you adjust one parameter (say .... VTA?) then you have to re-optimize a bundle of other parameters. |
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| fdegrove |
Hi,
| quote: | | i had plenty of experience with this thing, i found that if i raise the air pressure to sonically desirable values then the slider tube tends to jam due to being pulled elliptical by the air pressure. |
Hmmm...Not sure how much pressure you tried to pass but if pressure's too high than the airseal will start to leak.
How you manage to create an elliptical pressure field in the incredibly small space between a round rod and an equally round slider I don't understand.
AT warns against too much airpressure as it may damage the "assy" (their speak for assembly).
I've had no problems with the standard airpump they supply for the past ten years.
All it takes to keep it going is a little cleaning of the main carrying rod, airpressure takes care of the rest.
| quote: | | What i don't find alltoo desirable (as with any commercial tonearm) is that if you adjust one parameter (say .... VTA?) then you have to re-optimize a bundle of other parameters. |
You really surprise me here....
If there's one major reason I chose the AT over any other design then it's because it allows for VTA adjustment even while playing a record.
As it's a rack and pinion system, all it requires is being absolutely level.
If it's not then yes, all else will be off as well.
Logically, if you pull VTA too far upwards/downwards you'll lose tangency but then you can expect that with any arm of any type really.
All in all, I don't have any complaints about it.
Cheers,;) |
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| arnoldc |
| this is my friend's DIY tonearm mounted on a VPI turntable. hand made from Philippine Ebony wood. |
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| arnoldc |
and here is mine...
Eminent Technology ET 2.5 on Oracle Delphi Mk II |
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| peterr |
| quote: | | this is my friend's DIY tonearm mounted on a VPI turntable. hand made from Philippine Ebony wood |
It looks really nice!
But what is this thing in front of the headshell?? |
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| Brian Clark |
| quote: | Originally posted by arnoldc
this is my friend's DIY tonearm mounted on a VPI turntable. hand made from Philippine Ebony wood. |
Wow! Now that really is interesting :bigeyes:
Please tell us more. I would love one of those...covet covet....
Brian. |
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| arnoldc |
| guys, i'd rather invite the creator into this forum to further explain it. |
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| dice45 |
Frank,
| quote: | Originally posted by fdegrove
...Not sure how much pressure you tried to pass but if pressure's too high than the airseal will start to leak.
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did not experience that, back then. I did not know about an airseal so i presume it stayed tight.
My buddies and me tried out back then that the arm's low frequency performance (sonically) became better with increasing pressure. But too much and the slider's bearing tube would be pulled to an oval profile.
| quote: |
How you manage to create an elliptical pressure field in the incredibly small space between a round rod and an equally round slider I don't understand.
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Quite simple: the AT i tried out back then had a row of nozzles at 12:00 and one at 6:00 clockwise. So -- considered that the slider tube is thin-walled as well as precisely manufactured and with quite a narrow gap towards the cylindrical rail -- if the pressure exceeds a certain value, the air pressure deflects the formerly cylindrical profile of the slider tube to an oval profile tending to have a bigger inner dia (measured from 12:00 to 6:00 position) and a smaller inner dia (measured from 9:00 to 3:00 position) . If the pressure exceeds another value, the smaller elliptical dia will become so narraow that it clamps on the rail. | quote: |
AT warns against too much airpressure as it may damage the "assy" (their speak for assembly).
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see above: ifthe pressure exceeds a 3rd value, the oval deformation may become permanent.
| quote: |
I've had no problems with the standard airpump they supply for the past ten years.
All it takes to keep it going is a little cleaning of the main carrying rod, airpressure takes care of the rest.
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understandable that AT supplies a pump keeping within safe limits, pressure-wise :)
| quote: |
You really surprise me here....
If there's one major reason I chose the AT over any other design then it's because it allows for VTA adjustment even while playing a record.
As it's a rack and pinion system, all it requires is being absolutely level.
If it's not then yes, all else will be off as well.
Logically, if you pull VTA too far upwards/downwards you'll lose tangency but then you can expect that with any arm of any type really. |
For small VTA deviations you are right.
But vintage 1st pressings, like RCA Victor shaded dog or Mercury Living Presence may not do you the favor to have about 20° VTA, they rather may reside at 15°.
An old friend reported that on his Fidelity Research FR 66S (that's a 12" arm) he needed to lower his arms vertical pivot by about 20mm to get the VTA right for Mercurys -- that is 3.81° from level.
Opus3 or certain other modern pop labels OTOH are noticeably above level.
And with this vertical deviation a linear reack and pinion won't do, regardless if you adress tangentiality, offset angle (corrections if the cartridge's generator system is rotated towards the mounting flange) or whatever.
Now we have to add what the cartridge deviates from level, VTA-wise, plus or minus. For this reason i designed my linear trackers
for a VTA rage of minus 5° to plus 4° from level.
I don't believe i ever will need the +4° but with-5° limit, i don't think i have alltoo much headroom.
I cannot tell from daily life if my friends measurements are paranoid as i cannot adjust my SME V to such low VTA angles - the arm tube would crash into the vinyl edge, make that the platter edge. But to get it confirmed, i borrowed a 12" pivoted arm mounted an MC cartridges with a sharp stylus into it and made some plausibility tests with RCA shaded dog, Decca UK, Mercury, EMI. I found the Decca below level, RCA to be noticeably below level and the Mercury noticebaly below that.
So .... either i am as paranoid as my friend :) .... or his statements do describe reality. |
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| jackinnj |
| this was a memorable cover -- I have been subscribing almost since the beginning of AudioXpress and have every issue: |
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| Duck-Twacy |
Its not mine, but looks funny
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| hybris |
Today I saw the picyure overthere at the give directory. Look for something jellow and silver in front of a red background. Th e arm is hanging upside down, with the counterweight stub on top.
Jan. |
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| arnoldc |
How i wish i could have this turntable
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| planet10 |
| quote: | Originally posted by dice45
For this reason i designed my linear trackers for a VTA rage of minus 5° to plus 4° from level. |
How is your arm coming along Dice?
dave |
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| planet10 |
| quote: | Originally posted by jackinnj
in action: |
The ERA it is playing on was a great little budget table.
dave |
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| planet10 |
That looks like a well done 3D model/render as opposed to the real thing?
dave |
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| user510 |
Hi.
Yeah, that's a 3D 'virtual' tp16. Geometry in Rhino, Render in BMRT. I'm a little weak on the render part of things hence the telltale clues.
-Steve |
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| dice45 |
| quote: | Originally posted by planet10
How is your arm coming along Dice?
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Planet10,
as i am still intending to make it a product, i am not even sure if i should loose any word about it before the thing is ready for manufacturing. |
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| planet10 |
| quote: | Originally posted by dice45
as i am still intending to make it a product, i am not even sure if i should loose any word about it before the thing is ready for manufacturing. |
Bernhard,
Probably not... just good to know it is still progressing. I hope that one day its availability and my ability to buy one cross. :)
dave |
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| stereobass |
Here's my diy tonearm, minus the wiring. & finish. Arm is bloodwood, clamp is purpleheart, base is maple. Cart is junk:xeye:
Early test are very promising. |
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| Roger Waters |
Here mine, completely DIY !
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| sonyacer |
Roger Waters ,
Could you share the experience of diy tonearm( skill and method)?
I wound like to diy tonearm.
What is the material of your tonearm?
Could you give me some information by e-mail of your diy tonearm?
It is very great. |
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| lpd |
SME IV with Koetsu Rosewood Signature....
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| Ropie |
| Some beautiful work :cloud9: |
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| barossi |
Here's mine:
Greetings Barossi |
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| barossi |
another one:
Greetings Barossi;) |
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| Roger Waters |
| very nice !!! |
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| janils |
Hi all - I'm new here, but could not thank no to this opportunity.
Here is my DIY TT with double carbon fiber armtubes, Ruby cartridge. Internal wiring is Audio Note silver.
The deck is also DIY, but totally taken apart at the moment. I await my DIY Platine Verdier (a friend makes the platter and bearing). The base will be either granite or black glass in some kind of CLD.
Here's another picture:
The arm features adjustable VTA during playing. The thin silicone rubber hose on the back of the arm is normally sitting in an arch behind the arm with the cabling twisted around it. On this picture the arm is disconnected.
This arm will be mounted on my new deck along with my trusted 3012 SME/Ortofon SPU. |
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| livemusic |
Hi Jan,
Very nice! Clever solition with double tube arm!
Could you provide some more details about your slider: air pressure, distribution holes, manufacturing?
Regards,
Michael |
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| janils |
Hi Michael,
The two tube construction is quite clever (if I have to say it myself). The top clamp on the base can be loosened which makes it possible to twist the arms to change the azimuth. You can also change the lengt of the arm this way.
Each tube is made with two carbonfiber tubes with a thin layer of paper between them. This makes it much easer to get the thin internal cables through the tubes and gives some kind of damping. The inner tube is filled with cotton to hold the cabeling tight.
Air pressure comes from a big Wisa pump. This is a double chamber pump and very efficient. The pump as well as a big air "capacitor" (a big plastic bottle) are placed in another room and conneted with a 30 feet hose through the walls into the listening room. Air pressure is quite high as the construction works with pressure rather than flow.
My first TT arm had a bearing rod wiht laser drilled holes. But this gave a lot of problem with noise and lack of stability. The next one was based on the Versa Dynamic with a very short 3" arm placed just above the platter. The short arm gave big problems with wow, as the pivot point was way above the surface of the platter.
The "sled" has just one hole beneathe the fastening of the silicone tube. Internally there is a thin cavity to distribute the airflow all along the surface. The bearing rod is precision steel approx 22 mm external diameter, and the outer sled has been made to fit this very precisely. In fact is is allmost impossible to move it without any air-pressure.
All parts except the cabonfiber and the bruyere housing for the cartridge has been made by my brother who is a precsion mecanics and has the machines to tool aluminium, steel and such things (I just do electronics and speakers!).
I plan to fit the armlift with a motordrive and make some kind of stopping mechanism to lift it when it reaches the endgroove. Another mod is to increase the mass with leadweights so it will fit better with my Ruby.
Regards from Denmark, |
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| Audiofanatic |
Here is my tonearm.
Audiofanatic ;) |
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