TechDAS vacuum hold down strength

rockitman

Member Sponsor
Sep 20, 2011
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How does it work with dished 200 gram classic records single sided 45 rpm lp's ? In the case of dish with the outer edges raised, does one need to press down the outer edge of the lp in order for it to hold it down tight during the vacuum hold down process ? I'm still a couple weeks away until I can try this for myself.
 

Johnny Vinyl

Member Sponsor & WBF Founding Member
May 16, 2010
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Is this peculiar to CR 45 single-sided discs only? I've not noticed this on any of my CR's.
 

JackD201

WBF Founding Member
Apr 20, 2010
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Hi Christian,

The outer vacuum collar is inside the raised LP perimeter. The central platter is a bit higher than the outside edge. No problems.

No need to push the LP down. The vacuum power is strong but it takes a few seconds to suck that baby down. It isn't instant. If you set the cart immediately after activating the hold down you will see the cart go steady in 15 seconds or so granted there isn't much eccentricity. In which case, the only "wobble" would be horizontal.
 
Last edited:

JackD201

WBF Founding Member
Apr 20, 2010
12,318
1,427
1,820
Manila, Philippines
Is this peculiar to CR 45 single-sided discs only? I've not noticed this on any of my CR's.

Hi John,

It's only a bit more pronounced on CRs. As far as I can tell practically all LPs have raised edges. I was told that they are designed in to protect the record surface when they are laid down. Unfortunately the side effect is that they cause ring wear on jackets if LPs are not stored vertically.
 

rockitman

Member Sponsor
Sep 20, 2011
7,097
414
1,210
Northern NY
Hi Christian,

The outer vacuum collar is inside the raised LP perimeter. The central platter is a bit higher than the outside edge. No problems.

No need to push the LP down. The vacuum power is strong but it takes a few seconds to suck that baby down. It isn't instant. If you set the cart immediately after activating the hold down you will see the cart go steady in 15 seconds or so granted there isn't much eccentricity. In which case, the only "wobble" would be horizontal.

Thanks Jack. I should not of expected anything less. Nishakawa-San execution perfection ! ;)
 

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