Jelco heavy counterweight

[Ammonite Audio]

Marco uses the heavy counterweight on his SA-750D and I have found that, to balance my heavier MC cartridges, the standard weight has to be wound back almost to the end of the stub. So, I find myself interested in the heavy weight too, but does it really cost £75? That seems an awful lot of money for a lump of metal. That's more than a Tecnoweight, FFS!

[Stratmangler]

It does seem expensive for a lump of metal, even though it has been machined.

You could try a washer or two attached to the rear of the counterweight, that way the ugly add-ons would be better hidden from view.
I did this once on a Linn Basik Plus LVX to great effect.

[Marco]

Shuggs,

Don't forget the AOS discount (and the fact that you're a good customer), so speak to Dave ;)

Marco.

[pure sound]

I just acquired a 750L from Dave which he kindly supplied with both sizes of c/weight ie 100 and 150g. Having said that, because of the extra length of the arm, even the heavier weight is at the limit for my cartridge (22g) and for the SPU I intend to use (33g), I expect it may not be enough. However I found an OL rega weight (100g) which seems to fit nicely on the stub & this in conjunction with the smaller Jelco weight may give the right amount of balance. We'll see.

[Marco]

Hi Guy/Shuggs,

I use the heavy Jelco counterweight (reversed) to balance out the M3D, which combined with the AT LT-12 headshell and brass spacer (to add extra mass) weighs 30g, and the c/w resides halfway along the stub of the SA-750, so no problems there. The heavyweight Jelco c/w really is a beast! :)

Marco.

[pure sound]

The trouble is that the heavy weight is intended for the 9" arm. Hang all that mass 12" out and then see how much heavier still the counterweight needs to be

[MartinT]

I use a 750 heavy weight on my 250 arm for the AT33PTG. This means the counterweight is very close to the limit of travel forwards and keeps the effective mass down.

[Ammonite Audio]

I use a 750 heavy weight on my 250 arm for the AT33PTG. This means the counterweight is very close to the limit of travel forwards and keeps the effective mass down.

Will you sell your heavy weight to me when you get your new arm? :)

[MartinT]

I don't think Hamish will be needing it (he will be using an AT OC9) so I'll reserve it for you :)

[Ammonite Audio]

I don't think Hamish will be needing it (he will be using an AT OC9) so I'll reserve it for you :)

Ooh! Thanks!

[jonners]

The cheap and easy way to get the exact weight needed is to use lead strip with a sticky backing wrapped round the stock counterweight. It doesn't look too bad either: http://theartofsound.net/forum/showpost.php?p=39916&postcount=14

You can find the lead on eBay: Search for 'lead flashing for dolls houses'.

[blake]

The trouble is that the heavy weight is intended for the 9" arm. Hang all that mass 12" out and then see how much heavier still the counterweight needs to be

There is a 170 gram heavy weight specific to the 750D but there is also a 216 gram heavy weight suited to the 12" version.

http://shop.ebay.com/?_from=R40&_trksid=p3907.m38.l1313&_nkw=jelco+counterweight&_sacat=See-All-Categories

[Dave Cawley]

They are all listed half way down here!! http://www.soundhifi.com/jelco.html

Dave

[pure sound]

Having double checked, Dave has supplied me with the 161g and 215g weights but it'll be handy having the extra 100g rega weight to use with the 161g if need be.