nagra Sela 2880-BTS

[Tony]

hi all Dear. i'm a very new on these Nagra stuffs, could any one help me how to hook this SELA  2880-BTS mixer, how to hook to the amplifier? i do have some Nagra cables. i'm really looking forward on all dear friends in this room? please, thanks 

tony. 

[dela]

I have a Sela 2880-BT that has been modified to have a stereo output, but I don't know if it is a factory modification (turning the 2880-BT into a proper 2880-BTS), or if it is just something that somebody came up with. If you could post a photo of the two sides of your 2880-BTS, I can check if the Tuchel connector that has been added on mine, is standard for the 2880-BTS. In that case I can check the pin configuration and post it here.

 

One thing to look out for is that on my stereo version the output is unbalanced, high impedance with a 100 kOhms series resistor. This was made to accommodate the Nagra IV-S input that was current driven, not the usual voltage driven input. If you want to use the 2880-BTS to anything else than a Nagra, I would advise you to remove the series resistors on the output. That will give a better sound quality on a "normal" high impedance input.

 

https://www.filmsoundsweden.se/backspegel/start2.html

 

The link here Is a link to a very fine swedish website with a lot of info on historical stuff. You probably can't read swedish, but if you look for the 2880 articles, there are some schematics for the different versions.

[The Immoral Mr Teas]

filmsoundsweden

 

Cheers Dela,

 

what a fascinating site to browse through

 

and I've already found some interesting vintage stuff there in English:

NAGRA RECORDER

 

 

[Olle Sjostrom]

If anyone needs a translation that’s not Ai, hit me up. Otherwise I think at least Google does a half decent job

[dela]

 I just dug out the SELA and I checked the internal cabling on it; it seems that it should be modified to being a standard 2880-BTS. The connectors on the right side are for a mono Nagra (with two line out Tuchel connectors in parallel). On the left side (on mine at least) there is a single Tuchel connector for connecting to a Nagra IV-S. The mixer line out connector has the same corresponding pin configuration as the line in connector on the IV-S:

 

Pin 1: Ch. 1 out

Pin 2: -10 V supply voltage (Observe that it need a supply voltage negative with respect to ground)

Pin 3: Ch. 2 out

Pin 7: Ground

 

I bought it some years ago, but I never got around to actually testing it at the time. So now I have checked it, and it works fine and with quite low noise. I got it with cable for both mono recorders and the IV-S (there are two different cables).