Home made equipment isolation platforms.......?

I can just imagine one or both of may cats using it as a spring board

Will do

 

Cheers for the reading material

 

So where did you price it? I bought 4 feet (not a 4 foot by 4 foot square sheet )from a show at £10, which I thougt seemed steep for 4 squares of moulded black rubber, but had to experiment another avenue of disbelief, and relatively cheap considering some of the other iso gear available, and now look where that £10 has lead

 

I really don't remember now!

Have fun!

 

Agreed. Shoving various things under components is as I've said before, a bit half arsed. Wood cones and a ball bearing for example will have the same resonant frequency as a spiked wooden rack. Same materials, same result. Frictional losses and compliancy are way higher under compression too. The only things that'll work optimally under compression are a Vibraplane (including the DIY innertube method) and various density high-loss materials like Sorbothane. If you've got the skills IMO the SME design or a variant of is the best option to have a tunable system.

 

ARe you sure of this?

Would it be a problem if it WAS so?

???


How many oak hifi racks do YOU know of??

Like I say the inner tube method didn't work for me....

AS Is ay its certain ly worth thinking about but my present view is that its an overly complex design. Prove mme wrong by all means!

 

So 'wood' has the same properties no matter what it is then?

 

No not at all but are you gaining anything ?

True, not many. Doesn't the furniture chap on the forum use solid oak ? There isn't anything special about oak though is there ?

I don't really like it either.

I'll make an add-on to my current rack for the turntable when I can get my motivation back. I only finished my last rack two weeks ago

 

Well obviously they vary in density. If those densities vary enough to have an audible effect on the resonant frequency of different hi-fi components I'm not so sure.

I do however think that on looks alone wood is by far the nicest material to make a hi-fi rack from.

 

....ohhh, yes!





I can asure you wouldn't be wasting my timeif I didn't feel I was getting sonic benfits from what I am doing.

Mark uses a variet of woods I believe....which, as you observe, takes advantage of their differnt resnant frequencies.

(So, yes, Mark has the advantage on me.... )

I would say that Oak has good reputuation for general absorbtive properties (in conversation I agther that it is used in the bottom of my dads canal boat as an engine mount/damper......hes got an old twin cylinder russel newbury in there..or similer).

It is used frequently in many applications for this purpose, I beleive.

.....It didn't give me much sonic benefit.....agreed

pics??


(BTW factor in the odd winter cold re the motivation ...of which I have an example as I write )

pics, please??

 

I have alsoo used beech , hard as rock, difficult to work, + doesn't work as well!

Partly why I use it!

 

how does bubble wrap work then? ive tried this recently and it seems to work really well under my valve pre amp, but not the cdp...why is this? It seems to bring out vocals really well, but kills the bass a bit, though seems to clean it up...Am I having a mid-life? any thoughts

 

how high do you plan on floating it ? it could be as little as a cm or put some feet under it just incase it does fall if its a bit taller.

I doubt it , what does the engergy convert to ? heat ?
small vibrations are probably better controlled with 1 large heavy platform (say a 6" thick chunk of wood) than lots of loose fiddly bits that will just jangle along with the vibrations.

how hard could it be to make this...(sorry about my amazing paint skills)


imagine the black lines are the frame , the red lines the elastic and the grey block is the suspended platform.

would probably take someone about 30 mins with a nice chunk of wood tops.

 

"I doubt it , what does the engergy convert to ? heat ? "

......thats the word......or commonly held belief.

The balls (not "BASS", of course, above) vibrate, dissipating vibs away, in a similar manner in which spikes are said to.

Yes, my design is a little full of bits of jaggly bits, true. The fcat has been suggested....more work needed! AS a matter of interest I'm sure I've lost some top end frequencies, so some hthings not quite right soemwhere. I don't want to loose the bottom end though!

YOu design is interesting.....

Worth checking out!



(BTW in my experinece nothing ever takes just 30 minutes!! )

 

Hi JCL,
If you take a look at some really expensive guitars and look at what materials are used you can get some idea of the variation in properties between different woods.
Completely off topic I know but take a traditional Long Bow made from Yew, 2 different parts of the same tree and 2 radically different properties.
At one end of the scale you have soft woods like Pine, then things like Cork, all the way through to Lignum Vitae and Ebony.

A great variation to choose from.

Still I must say most choices are governed by looks and fashion, hence why pine isn't often used (although it's perfect for Hi Fi)

 

"pine isn't often used (although it's perfect for Hi Fi)"

is it?

why?







Quick note....I just adjusted my iso platform sot that....from cd player down

blutak

granit slab
3/4 inch wood (oak i think)
anther granite slab
blutak
wooden frame as in pic....but with just one set of down ward facing cones, glued to the frame.

sounds ok, though I say myself.

The top end (symbols (sp?) etc are back)


I was just looking...the next trick might be bubble foam between the frame and the granite mass. Could be interetsing.

No, I haven't done the frame Wickfut, I've been so full of cold today you wuoldn't belie. Its fluey actually.

 

Hi David,

It's a softwood which, in thick enough chunks, works in a similar way to cork. Soaks up low level frequencies nicely. The down side is it's easily damaged and well, it's pine.
Another wood to try is Tulipwood, somewhere between a soft and hardwood.

Have fun!

 

...interesting.....

must give it a go!






:beer:

 

Just stick the CD player on a solid surface. It will sound OK, though I say so myself.

 

I couldn't agree with you more Mike; its finding that solid surface!

Long time no hear BTW.........hows it going?