Behringer EX-1 Edison schematic (looking for)

[clintrubber]

Before I might trace it myself, anybody knows where to find
the Behringer EX-1 Edison schematic ?

We've discussed it here before and we know Beh. won't give these out, but
I wouldn't mind any 'found info' or circuit-tracings that people might have done themselves.

Thanks,

Peter

 

[12afael]

I don`t know where you can find the schematic, but if you can take some pictures of the pcb I could help you to trace it.

 

[clintrubber]

[quote author="12afael"]I don`t know where you can find the schematic, but if you can take some pictures of the pcb I could help you to trace it.[/quote]
Thanks for the offer. IIRIC I've opened this box before and I thought there wasn't much inside, so tracing will be fairly quick & easy I expect. I'll take pics anyway when I open it (in a few weeks), will post.

Bye,

Peter

 

[Script]

Anyone has the schematics and could upload to the Technical Documents section?

 

[rascalseven]

BUMP on this. 

Anyone got the Edison schematic?  I got an early Chinese build that I'd like to upgrade with better IC's, bypass caps, etc.  Wondering what the two trim pots on the pcb are for and if I'll need to calibrate after the upgrade.

Schem, anyone?

Thanks,

JC

 

[analogguru]

BUMP on this. 

Anyone got the Edison schematic?  I got an early Chinese build that I'd like to upgrade with better IC's, bypass caps, etc.  Wondering what the two trim pots on the pcb are for and if I'll need to calibrate after the upgrade.

Schem, anyone?

Thanks,

JC

The IC´s aren´t that bad - they are NJM4580.  Trim pots are for the symmetry of the electronic output balancing.

analogguru

 

[rascalseven]

Thanks, analogguru!

Good to know about the trimpots, thank you!  As for the IC's, they no doubt used various models throughout production -- mine are BE037, which were apparently a Behringer rebadge of the LM348 (slew rate of 0.5V/us  ???) and 4558, so I'm gonna bump them up to something at least a bit more expected in pro gear (33079, TL074, 5532, etc.).  I stuck sockets in there, so I'll roll some IC's and see which ones make me smile the most.

Thanks again.

JC

 

[analogguru]

.... mine are BE037, which were apparently a Behringer rebadge of the LM348 (slew rate of 0.5V/us  ???) and 4558,....

Thats the typical bullsh*t rumour.... (spreaded by those type of corksniffers who claim that the Alesis 3630 will sound more "transparent" and "open" by [only] changing the opamps in the sidechain)

Both, the Behringer BE027 and the BE037 are specified as follows:

Output Current: +/- 50mA
Slew Rate (RL = 2 kOhm): 5V/µs
Input Noise (RIAA, Rs= 2k2, 30kHz LPF): 0,8 µV RMS

Compare it with the NJM4580 Datasheet and you will know, what it is.
www.bucek.name/pdf/njm4580.pdf

BTW, Neve Electronics used the Harris HA-4741 in their BA717 EQ (from the VR-72 console) which has a slew rate of only 1,6V/µS (see page 5 in the top middle):
http://www.technicalaudio.com/pdf/Neve/Neve_BA716-BA717_EQ.pdf
and nobody ever said, that the tons of music produced on this consoles sound sh*tty.

analogguru

 

[analogguru]

On April 10, 2012 Uli Behringer himself lifted the secret:

http://www.musiker-board.de/talk-feedback-bt/471811-fragen-uli-behringer-17.html#post5830425

The BE027 was a dual-opamp, which was a selected version of the original NJM4580, the BE037 again was a selected quad-opamp of the type NJM2060.  New Japan Radio produced them for us,...

So against all rumours of some wannabe-experts they were NO 4558´s, NO 4560´s,  NO LM348´s and also NO NJM2058´s.... And this was obvious from the above datasheet - released by Behringer in 1991.

BTW, the difference between the BE037 (NJM2060) to the highly-praised MC33079 is neglectable.

analogguru

 

[Michael Tibes]

Has the EX-1 schematic maybe surfaced anywhere meanwhile?