601 platter on a 701?

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T68
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601 platter on a 701?

Post by T68 » 18 Sep 2019 19:50

I know I don't need another turntable, blah, blah, blah...
But I cannot help sniffing around a 701 that's up on an auction service here. Price is really tempting and it has been listed for some time without any bids. But it got issues. Broken dustcover is one. A hideous white base another. But more serious is that it's sold with a 601 platter. Seller claims it works but strobe is barely visible.
Is this a working combination? If I get it, of course I will look for an original 701 platter but who knows when it will turn up.
Having a 601 in the stable already this would be a nice addition.
Hmm. What to do, what to do...

Legrace
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Re: 601 platter on a 701?

Post by Legrace » 19 Sep 2019 14:21

The white bases are relatively rare and I have always preferred the appearance they lend over the wooden finishes. Seems classier somehow, of course each to his own in this respect.

T68
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Re: 601 platter on a 701?

Post by T68 » 19 Sep 2019 16:00

Haha, yes - true that! I don´t know why I don´t like white gear.

T68
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Re: 601 platter on a 701?

Post by T68 » 19 Sep 2019 18:45

...but with that said, I like the looks of my Garrard Zero 100 that has a white top. So maybe I'm coming around :-)

GuidoK
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Re: 601 platter on a 701?

Post by GuidoK » 20 Sep 2019 03:41

If I look at Dual's technical specs, the 701 platter is much heavier than the 601 platter:2,9kg vs. 1.3kg.
So thats a 1,6kg difference (most turntable platters dont even weigh that much)

I wouldn't go for this offer. The 701 is a subchassis turntable, which means the stiffness of the springs is tuned to the weight of subchassis. If there's a 1,6kg difference, I don't think thats beneficial.

Also the height of the platter is important, as it effects the VTA of the cartridge. I don't know if thats the same of both platters.

Actually I'm surprised it works. The strobe scales on the underside are also different
701 platter:
https://i.pinimg.com/originals/56/70/5e ... 55b460.jpg

601 platter:
https://img.canuckaudiomart.com/uploads ... 601-tt.jpg

You can also see that the construction on the underside is different.

I think, unless you can get a genuine 701 platter, it's better to look for a complete 701

Actually you might be in luck:
https://www.ebay-kleinanzeigen.de/s-anz ... 3-172-1110
(note that the side of this platter is painted black but you probably speak/read german, being swedish)
Don't know what postage would be from germany to sweden though.

I like the white base on 701's. Dustcovers are available on ebay and such, both in newly made clear as in smoke.
https://www.ebay-kleinanzeigen.de/s-anz ... 1-172-3830
https://www.ebay-kleinanzeigen.de/s-anz ... 0-172-3830
https://www.ebay-kleinanzeigen.de/s-anz ... 4-172-9049
https://www.ebay.de/itm/DUAL-721-704-60 ... 3173169034
https://www.ebay.de/itm/Haube-und-Zarge ... 4013234185
https://www.ebay.de/itm/Original-Dual-7 ... 3665672756

Most germans will ship abroad if you ask them is my experience

Edit: I saw the 701 you're talking about, the one with the damaged cover.
I'd say go for it, that might be a steal! (first ask if that german is willing to ship that platter to sweden)
I'm tempted to snatch that thing from right under your nose :mrgreen:

T68
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Re: 601 platter on a 701?

Post by T68 » 20 Sep 2019 08:54

Thanks for your reply Guido!
...me and my big mout. I know should not have mentioned this potential find ;-)

DSJR
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Re: 601 platter on a 701?

Post by DSJR » 20 Sep 2019 10:16

Here we go and I'll try to be gentle with you - I'm not as diplomatic as Dualcan Klaus...

The entire motor performance of the 701 motor is geared to the servo and platter relationship. I dare say a 701 platter on the 601 may well improve rumble (motor harmonics and so on) performance and with proper lubrication the main bearing thrust assembly shouldn't be overloaded, but no idea at all how well or not the 701 EDS1000 motor would run with a lighter platter.

*****DO NOT BUY!!!*****

(you'll still ignore me, but I say it anyway)

I've just put my 601 platter on my 701 and although the ride-height is OK, the servo on the motor, so gentle with the proper platter, overshoots like f**k with the lighter 601 platter as badly as the cheapest nastiest direct drives we slagged off in the 70's and 80's. This WILL have a deleterious effect on music reproduction in my opinion (it's called dynamic wow, but since many audio people seem to be tone deaf it possibly doesn't matter). It was so bad I put the 701 platter back immediately.

Maybe a proper 701 platter will come up for sale, but it's the only way the motor will run properly.

End of lecture - as you were chaps...

GuidoK
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Re: 601 platter on a 701?

Post by GuidoK » 20 Sep 2019 14:42

DSJR wrote:
20 Sep 2019 10:16
This WILL have a deleterious effect on music reproduction in my opinion (it's called dynamic wow, but since many audio people seem to be tone deaf it possibly doesn't matter).
Good comment, I hadn't even considered this effect.
Indeed the direct drives of the time are driven by pulses, and the inertia of the platter dampenes these pulses to a fluid rotation.
I have an old pioneer directdrive with a motor that maybe only pulses 3 or 4 times per rotation. Really weird to see that motor spin without platter.

So definately get that german 701 platter.

Tinkaroo
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Re: 601 platter on a 701?

Post by Tinkaroo » 20 Sep 2019 14:55

Perhaps a 704-721 platter could be an option?

GuidoK
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Re: 601 platter on a 701?

Post by GuidoK » 20 Sep 2019 15:10

Those are also not as heavy, and I have my doubts it'll fit. For sure it misses the strobe ring on the underside so thats an issue too.
But as I showed in my first post, a 701 platter is (was? he probably already bought it?) for sale in germany for cheap so I don't think the TS will have trouble to source the 701 platter.

T68
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Re: 601 platter on a 701?

Post by T68 » 20 Sep 2019 15:54

Good input, DSJR! Definitely gonna give this one some thought before I decide to go off to bidding war or not.

Legrace
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Re: 601 platter on a 701?

Post by Legrace » 20 Sep 2019 16:24

If you can get the proper platter for it a white plinth 701 is definitely a collectable.

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