Hi all,
One suggestion for an arm pod that I am about to fabricate from a proto-type that I designed. I purchased a solid brass pivoting arm board manufactured from tw acustics of raven tables.
Using a pivoting arm board will allow you ease of flexibility during set up especially with 9 inch arms and any tables with a chassis top deck like the Technics SP 10 MKII.
Also if desired the added use of a tone arm heavy nut as used with some models of Micro Seiki, Fedility Research just to name a couple.
i plan on using laminated layers of B-25 panzerholz and a 30 mm thick length of brass tapped and threaded for the arm board.
The feet I have not settled on as of yet.
As for the platform which all this will rest on will have to be inert. I can forsee problems with out door variable climate change/ house hold humidity, the platform will expand and contract enough in some cases to throw out the tone arm and cartridge set up.
This is just my 2 cent contribution.
Cheers
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Hi Chris, Is Panzerholz effcted by humidity or dry conditions? Im assuming it would. Directions point out helpful guide lines , one being after cutting seal cut edges.
This being a product designed for multipal applications in heavy industry it being in your home used for delicate duties I so far found no issues over a year in use.
It is extremally dense stuff dulling high grade carbide cutting edges very quickly.
For use as arm pod or plinth material for sure. Is it like other material commonly used in audio, No.
Is a plinthless table a good sonic step forward, Yes
Is a table set into a panzerholz plinth a sonic step forward , Yes
Cheers |
What are your thought's on a pod utilizing a cantilevered pivoting arm board ?
Contimplating this myself the arm board would be robust using select material which easily configured to facilitate tone arms with multi point mounting base or single hole mount with free space under the board for a heavy fasening nut found with some tone arms.
Further thoughts using a heavy pod, hitting the target for pivot to spindle set up must be frustrating nudging that heavy pod fractions of a mm.
Just my thoughts of the virtues of a pivoting arm board. |
Halcro
I was not aware of Corby's work, thank's for bringing this to my attention.
As nice as Corby's design looks and is I find it overly complicated for my requirements and perhaps as you mention plagued with stability problems.
My design is as simplistic as your pods are though mass is the only thing they share in common. |
Halcro,
Pictures, I can do one better and send you a sample of my work to try in your own system if you like. I am familiar with your tables and some of your tone arms.
Briefly, my pod design is from the top down where most of my time was involved, mass loading is the second stage of the pod.
Henry I understand and appreciate the effects of solidity and stability has, however in my view regarding tone arms its not always a good thing to direct couple that arm to metal plates and hunks of metal.
Don I extend the same offer if you are interested.
Sorry for being vague I can explin in more detail with a p.m.I have to cut this short, road trip.
Regards Mark |
Lewm your comment on the cantilevered arm board pod was visualized completely.
It's just another design method that would be an easy build, fairly inexpensive and very convenient with use.
More importantly emphases are on further isolating tone arms from imposing colouration's including help reducing vibrations of all sorts by way of experimenting with arm board material type. |
In my current home, room and speaker interactions are a source of some real problems. When the gain is turned up i believe this excites the built material of the walls ,ceiling ,suspended floor causing many problems.
With my sources 13 feet away from the closes speaker i decouple my stand from the floor the best i can for now and then decouple the turntable from the stand, it's a job still under construction.
Our previous home listening room was so much friendlier and a real joy to listen music in, concrete slab on grade timber framed home with open vault ceilings.
The living / listening room simply had excellent acoustics.
One experiment listening for feedback problems in our previous home by placing an lp on the platter then resting the stylus on a stationary lp ,turning the gain up full i would be hesitant to try in our new home yet.
This may sound all bad however using a Placette active preamp with a Hell of a nice headphone section and Sony R-10 headphones immediately solved all my room related problems, I think.
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The brilliant force behind the marketing of the Onedof summed it up for me like a super nova with Oneduff's Youtube production, click on (resonances do not occur) in the suspension and damping section of this web site. |
Dertonarm states, audio could very well benefit from the legion's of aerospace engineers whom maybe looking for new careers, this one example turned his focus to building a record player. I'm curious why.
Has it Onedof truly have radically new thinking behind this product? Thuchan says no.
My view it's over priced and that's an understatement, the web site is generally poor, has pictures of jets, helicopters and space vehicles , a list of career education and projects he analyzed and worked on and if he were alive at the time and worked on the Hindenburg design, that unfortunate disaster would never have had happened. Anyway I'm sure the Chinese would hire him, he could take his skis with him.
As goofy as I found some things on Onedof site, I pictured in my mind Jethro and Granny of The Beverly Hill Billy's pitching his product.
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Dear Henry
Re: your thoughts on suspended tables designs is not true. In the 1980s through into the 90s I was quite content with a Sota Star Sapphire more so then anything before and after.
As the new decade approached my perception at this time was that buying new would have to be better. At least this is what the audio press was pushing of course.
This past decade saw a SME 20 including some TNT tweaked variants to a TW Acoustics AC from a couple or three years ago all ending with a dark sound I couldnt get rid of.
For the used going price of a sota sappire i'm thinking of a re-visit.
Pods,....for the sake of comparing your turntable solutions with experimenting with damping, rigidity and stability, put your Victor 101 in a well designed plinth with attached arm boards and attached adjustable feet, keep it all in the loop.
There are some clever ideas from some high profile members here on Audiogon that go beyond just mass loading with whatever seems heavy-ist.
Finally, some of you challenging the likes of Jonathan Carr , Dover and Lewn to name a few, on this subject of going plinth-less with pods as opposed to a solid grounded plinth really makes me wonder what you as a collective group of believers know what they do not. |
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Syntax A.J. Conti's technical papers on his over all design are very forward thinking.
However what stopped me from pursuing his Signature model a few years ago was the acyclic material he used in its construction, a material which is relatively inexpensive and easy as pie to mill.
Sure there are differant types of acrylic material but it turn me off anyway for the price of this table and my thoughts were is it a material choice just to keep cost's down?
Conti's innovative designs through out the 2800 could be entirely focused on the neutral side of things and perhaps were not effected so much by his choice of using acrylics, but i'm only guessing.
Reading Conti's papers and the reviews his tables should be crowned as a benchmark for most other tables out there including frequent mention everywhere of A.J.Conti's innovative thinking behind his designs, however this is not the case.
Dertonarm with his up and coming arm and table may find himself in the same boat with his own innovative thinking behind his products, appreciated by a few and misunderstood by many.
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Thuchan,
Holy smoke was your question answered in a big way !, does this mean a trip to Japan soon? |
Thuchan, would you need to make room if the Techdas lives up to your expectations?
I ask because I just completed a new panzerholz wall mount shelf with extreme bracing and damping built inside the wall.30 inches wide by 26 inches deep.
Henry, notice the arm on the Techdas? It really is a fabulous tone arm, have you tried it with your Victor yet? |
Henry
The first few months I also wondered about the Phantom set up on my Raven AC.
I also had various cartridges including a Dyna XV1S mounted on that arm.
However I could not understand why it did not perform as expected.
Previously before the Raven I had the Graham 2.2 and liked it very much.
I acquired my first direct drive in around this time and installed the raven arm board with the Phantom on it to that dd and really was surprised at the performance.
Conclusively I say the Graham Phantom is not a good mate with a Raven table, and further I really don't understand the fan club of this combination???
You sold it, OK. |
Thuchan I have a little Micro Seiki table and thought of a bigger one from time to time, but reality, that's as far as it would go.
It is a very rare thing to see any component in this hobby actually shoot up in value as opposed going the other direction. That retro mechanical look of some of the models I find quite attractive even with the model 1500 that I have.
Halcro
I can only specilate why this would be, maybe some sort of interaction the arm did not like at all, however sure enough with switching back and forth the Phantom and Dyna cartridge jumped to life on a dd table in a panzerholz deck.
No question what I was hearing between the two tables, it really did disturb me and that prompted me to sell the Raven asap.
If this fluke of an experiment wasn;t done most likely I would of looked at evrything but the table for this dark , border line listless music being played.
Not a very nice thing to say is it?, but I did spend a fare amount of money on it and my wife's reaction to selling it only after less then a year is another story.
Anyway I was quick to make that decision and thinking about it now as I type I wonder of a defect of sorts that was missed at the factory possibly? Well that was three years ago and I never did hear back from the buyer.
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