Project: Neumann VAB-84 and more....

[messdroide]

Hello trolls,

with this thread I want to throw a quick question in the round regarding the need for Neumann special cassettes for the Neumann SP-79, as well as for all other vinylcutting Studios without an SP79. It's a great chance to complete your VMS-70, VMS-80 Setup. Together with a Neumann development engineer we are planning a small Edition of following cassettes.

Neumann VAB-84 (size: DannerA2 or 1U)
Neumann SK-A (size: DannerA2 or 1U)
Neumann SK-E (size: DannerA1 or 1U)

the peculiarity is these devices will be built in two versions !
Version-1:Danner cassettes (original size) for the Neumann SP79
Version-2:1U RackUnit device without an Neumann SP79

The Danner version is fully compatible to the original Neumann produced cassettes! (with the original Tuchel/Amphenol T2701 connectors!). So put the cassette into the SP79 and enjoy .

As soon as the first units are finished, I will post some pics from the devices here. We hope in about 2-3 months to introduce the first finished devices.

These cassettes needed?

[Nickou]

It is very interesting ,
can you decribe those modules ?
I don t know those references of modules

Thanks

Y.

[TotalSonic]

The Neumann VAB-84 was found in some of the SP-79 consoles and was included mainly for the use with the VMS-82 for Direct Metal Mastering. It is a vertical amplitude limiter used to control depth of cut to within specific limits, especially useful for DMM since the copper blanks don't have as much of a possible range for depth as cutting into lacquer does. From my understanding (and it's possible I don't have this quite right) it would matrix the signal to a Lateral (aka "Mid" or "Sum") and Vertical ("Side / Differential") components and whose threshold could be set by changing a low pass crossover that sent to its side chain - and then applied a VCA limiter to the Vertical signal only - and decoded this back to L/R in order to send back signal back to the cutter head. As such it provided tool that could be used to deal with uncorrelated low end similar to the way that an Elliptical Equalizer does - but unlike an EE it's action would be somewhat dynamically variable with the program material. fwiw - at Europadisk we had the VAB-84 in line most of the time but would set the threshold most of the so that it wasn't triggering very much. It definitely saved the day on a few occasions dealing with some really out of phase material though.

Best regards,
Steve Berson

[TotalSonic]

The SK-A was a selecter/routing module - you can see one example of it at http://www.vintagetools.de/Vintage-Modules/Pan-Aux-Routing/Neumann-SKA.html

I'm not sure what the SK-E was - I'm curious to know the answer to that as well.

Best regards,
Steve Berson

[Nickou]

Thanks for the answer .
Best regards
Y.

[messdroide]

Hi guys,

it was poorly described from my side. Neumann has called all "Non-standard" cassettes as SK-A (SonderKassette = SK). Now in the annex some information. In the picture you can see left the SK-A and right a partially reconstructed SK-E.

In the PDF, i have some informations regarding the Neumann VAB-84.
many regards
Felix


German: http://www.vinylcutting.de/fileadmin/user_upload/pdf/Neumann-VAB.pdf
English: http://www.vinylcutting.de/fileadmin/user_upload/pdf/Neumann-VAB_EN.pdf

[TotalSonic]

Thanks for the pdf! So - the SK-A you have shown here is for the advanced pitch control options for the VMS-8x. As far as I know these controls wouldn't work with the stock pitch/depth computer of the VMS-70 or earlier.

Best regards,
Steve Berson

[messdroide]

hmm,
i think this is a good question for flo kaufmann. I don't know exactly but the VMS-70 supports only the Relative Disc Level Encoder that's right. After some searching I found a another version of the SK-A in my archive and as well a picture of an original SK-E.

Our reconstructed SK-A will look like as it is to see in the last post, the SK-E can be seen in this post.


cheers
Felix

[Bonati]

Very interesting, please keep us informed. Pictures are always good. You'd probably get more orders for the rackmount style in the US.

[tubefan]

I have the original EE77 and SK-E module with my VMS80 but if you look at the manual for the Prism Sound MDC-70, they have used ms matrixing on the preview channel with attenuators to achieve similar adjustments on lathes besides the VMS80 and VMS82. The other knob, for land economy, is not implemented as far as I know.