Magna Audio's custom-made counterweight balance and armboard service!

[jandl100]

Jerry ... Without wanting to lumber steve with loads of milling, have you thought about asking him to make you a big heavy weight/clamp?

I certainly have!

.... see my reply to Steve above.

[jandl100]

Good idea, Chris!

I'll measure my own kit up properly this time before I send it back to Steve!

[John]

Jerry how r u finding the new speakers

[jandl100]

Jerry how r u finding the new speakers

Well, this is a bit OT.

They are satisfactory so far. On 30 day trial - 2 days in. A fair bit of running in on these brand new speakers I should think, but they seem satisfactory so far. To say the least.

[jandl100]

Moral of the story: Never believe what you read on the internet!

[DSJR]

The sad thing is that you couldn't give LVV arms away not that long ago, and the base plate was the same as the Ittok one. I don't know why, but the LVV now sells for more than the LVX quite often - £100 or so.. Madness IMO

[jandl100]

Herewith & attached a recent pic of my Techie 1210 with special heavy brass c/weight by speedysteve for my massive re-bodied Denon 103.

I've had the c/w a while and it does an excellent job .... but the brass colour just increasingly irritated me! ... such a sharp contrast with everything else on the deck.

So for a couple of £ on good ol' fleaBay I picked up a small jar of silver chrome paint .... ah, that's better!
[Ackcherly - the silver paint job hasn't come out well with the camera flash - the actual beastie looks better than that].

[Magna Audio]

Mr Coco being a clever sort of chap who needed a big CW for his Alphason / IO lump did some research as to metal densities and came up with Tungsten being good and dense. Bit hard to work Tungsten perhaps so a Tungsten / Copper alloy was found.

According to the Coco metal density bible, densities are:-
75% Tungsten 25% Copper – Density 14.75
Tungsten Alloy – Density 16.9
Tungsten 99.95% - Density 19.3
Molybdenum 99.95% - Density 10.22
Steel is 7.8ish and brass is 8.5ish. So the copper/tungsten is about twice as much.

Here is a first weight made up for my arm (12" wand on PL-71 arm base & SPU Silver Meister cart).

Here is the comparison with the lash up I was using before - moves the mass much further in!


Slightly pink copper look that will dull as it slowly oxidises.

Moving the mass in is apparently a good thing to do - reduces the inertia and looks better not having a lump hanging over the end...

[Alex_UK]

Looks great Steve. I'd forgotten you are doing these - I need to sort something for my SME 3009 S2 Improved now I am running a Sumiko headshell, currently lashed up with two 50p pieces and some white-tack - it should be a fairly straightforward job, just a cylindrical weight with a thread and then a threaded piece:

Basically this is the standard one, and it needs to be heavier. Is that something you would be able to do? (And rough cost - PM if you like.) Cheers!

[Magna Audio]

Here is a CW for Mr Coco. He wanted 240g which would be rather large in brass or SS.
This is to balance his IO electromag cart...

He found Tungsten - I said isn't that rather hard to work? So Tungsten copper alloy was the trick, being pretty heavy - just 10cm of it at 41mm dia weighed 2.4kg!

Here is the new weight vs the Alphason ~ 100g one.

Note the inner nylon sleeve which presumably acts as a dampening. The grub actually presses the nylon tube onto the
CW arm stub.



The slight salmon tinge is quite nice and fades away a bit with some weathering.