SSL Computer Service Manual.

[horizonsound]

Hey all,

Would anyone be able to sort me out with parts of the Computer Service Manual?
I have an opportunity to pick up a lot of cards and parts, and just need to check on compatibility.
In particular, there appears a few versions of the main Mother Card 82E120?

Thanks in advance.

[ULH]

Hi

To my knowledge it is not very clear in the G Series Computer Service manual but Keith @ Recucled Audio got you covered:

https://www.recycledaudio.co.uk/consoles/ssl-faq-info/e-g-g-whats/

The term “E series” means that it can only run on original E series software and 8″ floppies, the memory is too small for later versions. Early ones had a 430 processor, later ones had 490 processor which, with a memory upgrade, can handle G series software up to console sizes of 56 channels. Also if you can find a SASI card the 490 can be used with 3.5” drives making it a G+ computer.
The term “G series” means that it can run G series software. These computers have either a 490, 4100A or Forman Hart processor with 2mb memory card which can run on 8″ floppies and use 20mb Bernoulli deives for extra storage.
The term “G+” means that the computer either has a 4100C processor of a Forman Hart/490/SASI combination and can run on 3.5″ floppy drives.

And the first pages of this in general great computer overview also from keith:

https://www.recycledaudio.co.uk/wp-content/uploads/2018/01/computerconfiguration.pdf

Hope this helps. Maybe we should try to document this a bit more to stay on top of SSL computer maintenance in the future?

Cheers,
Uffe

[horizonsound]

Thanks there Uffe,

I have a full G+ computer on the way and a service manual, and will be building a PSU for the computer.

Does anyone have some schematics for the SL665E computer PSU?

On a side note, the PSU that I built for my console has been performing flawlessly over the past 2 months. Very happy with the results there.

Anthony.

[ULH]

Yes it is in this manual:

http://forum.sslmixed.com/index.php/topic,428.0.html

Regards,
Uffe

[ULH]

Could you send a link about your console psu? Sounds interesting. Thanks!

[horizonsound]

Hi Uffe,

Here are some pictures :-

[ULH]

Nice. I have made something very similar for a Euphonix controller including sense wires to the Mean Well supplies. Which mean well models did you use for the +-18v rails?

[ULH]

And have you done any measurements  on the noise floor vs a normal linear supply? I believe there should not be any switching noise components in the audible area? And these design are very price competitive

[horizonsound]

Hi,

The modules used were RPS-500-18-SF, RSP-150-7.5, and RSP-150-48.
Original fans in the 18v modules modded for Sunon HA40201V4-1000U-A99

I've not done any comparative tests as I have never owned a CF661E supply, but I can say that the noise is about 10 times lower than what is coming back off my Lexicon reverbs in the rack.

Anthony.

[ULH]

Thanks for the info