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[Knobexploit]

I did, contacted Barco but number is dead, contacted Barco in Belgium but ended up in a buraucratic black hole.
I have seen the posted downloadables but i am not shure if its all i need.


Cheers

[Knobexploit]

David Kulka wrote on Fri, 23 September 2005 06:24

Ryan, what kind of files are those?  I DL'd them but was unable to open them.  I'm using a Mac, not that it should matter much.  Thanks.

Use preview.

[radardoug]

They are .JPG's.

[RMoore]

Stay tuned people - the full EMT244 manual /schematics may see the light of day scanned & online sometime soonish.

[David Kulka]

I too have been looking for 244 and 245 docs for a long time. Fingers crossed.

[Knobexploit]

Hi i called EMT Franz (what is left of it) and talked to their head engineer for a while and it does not seem to be that there are any schematics available for the digital board.
The have the algorithm under patent and say cannot hand out digital schematics period. They perform repair to the 244 for 125 eu per hour.

But talking to another former EMT pro seller i found out that the digital board was outsourced by EMT to a american company and he doubts that even EMT have the digital board schematics! He told me repair sequence by EMT was not a repair but a full digital/analog board swap!!

[David Kulka]

The American company was Dynatron, in Massachusetts. I believe the founder (Ralph Zaorski) is still around and was behind the short lived rack mount EMT 250 reissue that came out a few years ago.

[radardoug]

David, is this a board they rubbed the numbers off the ic's?

[David Kulka]

Doug, I haven't seen a 244 for quite a while so I really don't know but I would guess that most of the logic IC's will be missing their part numbers.

Someday I would sure like to see a timeline or history that covers the 244, 245, and 246. I always think of the 250 as "the first digital reverb" but maybe these models came first? The lower model numbers suggest that, but on the other hand they were all rack mount, so maybe they were more advanced, smaller package units that actually came later. Also, aren't all 3 reverb only? The 250 and 251 have other programs, most of which are silly and never used. People only use the reverb programs, and maybe delay.

Also, I wonder how the 244, 245, and 246 reverb algos sound, compared to the 250 and 251.

[zmix]

David Kulka wrote on Mon, 13 December 2010 23:29

Doug, I haven't seen a 244 for quite a while so I really don't know but I would guess that most of the logic IC's will be missing their part numbers. Someday I would sure like to see a timeline or history that covers the 244, 245, and 246. I always think of the 250 as "the first digital reverb" but maybe these models came first? The lower model numbers suggest that, but on the other hand they were all rack mount, so maybe they were more advanced, smaller package units that actually came later. Also, aren't all 3 reverb only? The 250 and 251 have other programs, most of which are silly and never used. People only use the reverb programs, and maybe delay. Also, I wonder how the 244, 245, and 246 reverb algos sound, compared to the 250 and 251.

Yes, all logic chip numbers are wiped (except the RAM, all 85kbits of it!)

From what I recall and have seen, the 244 was introduced as early as 1979 but probably 1980 is a safer bet.  It was supposed to be the reverb algo from the 250, wtth a reduced feature set ( for example there is no predelay, only one 6khz HF and one 100hz LF decay multiplication selection, no quad output)
13 bit successive approximation A/D, and 16 bit D/A,  18khz sample rate (IIRC the 250 was 26khz?).

[RMoore]

Knobexploit wrote on Sat, 11 December 2010 20:41

Hi i called EMT Franz (what is left of it) and talked to their head engineer for a while and it does not seem to be that there are any schematics available for the digital board. The have the algorithm under patent and say cannot hand out digital schematics period. They perform repair to the 244 for 125 eu per hour. But talking to another former EMT pro seller i found out that the digital board was outsourced by EMT to a american company and he doubts that even EMT have the digital board schematics! He told me repair sequence by EMT was not a repair but a full digital/analog board swap!!

Yes I too recall there being some lore about the digital section being designed by an American company where the technology was kept top secret apparently because of military contracts/connections (?).

In around '97 I saw a bunch of EMT/Barco factory repair bills for a couple of EMT244 units when I was at Eela Audio in the Netherlands & they were all around the same amount (expensive) - definitely could be consistent with a full board swap.

[David Kulka]

The EMT page on my own site (which I wrote some years ago!) has some further info on all this and may be of interest.

http://studioelectronics.biz/Services-EMT-13.html

It mentions "In 1972, EMT released the very first digital reverb, the rack mount 144." I'd forgotten that.  

Looks like the 244 was released in about 1979 or 1980, several years after the 250 which came out in '76.