Recent Posts

1

Sell-Buy / 611 cards - EQ, DYN and Preamp

« Last post by Badlybusted on September 30, 2025, 04:08:36 AM »

I have cards for 4000, 6000, 8000 611 channels:

Five (5) 82E292 Pink knob 292 EQ cards $500 for all four as a lot
One (1) 82E292 Pink knob 292 EQ card $150
Four (4) 82E02 Brown knob 01 EQ cards $500 for all four.
One (1) 82E10 Dynamics card - recapped tested and calibrated $250
One (1) 82E149 Transformerless Preamp card - recapped tested and calibrated $250

All cards are operationally ready. 

2

4K,6K,8K Series / 4000E - Multiple issues

« Last post by mike_signo on September 27, 2025, 06:22:47 PM »

I’ve run into a few hurdles with a 4000E I was working on and would appreciate any suggestions.

• LF issue – On one slot, I can’t send to main/quad bus LF. Swapping channels doesn’t move the issue, so it seems slot-related.
• Multitrack 15 – Channel 15 with direct works, but any channel routed to multitrack 15 via the routing matrix gives no output. Looks more like a backplane issue than a channel issue. Haven’t swapped 15 with another yet.
• Noisy pan pots – 3 of them are noisy when turning them. I tried Deoxit F100 through the shaft, but no improvement. Is there any option besides replacing them?

3

4K,6K,8K Series / Re: 50 way IDC connector in console panel!

« Last post by Dave Dicson on September 25, 2025, 09:58:22 PM »

On a small connector, I just used a hammer. The bigger connector, I add a strip of wood and use a hammer. Never had a problem.

4

4K,6K,8K Series / Re: Noise from 688?

« Last post by horizonsound on September 25, 2025, 09:35:27 PM »

That's standard on the 6000 consoles. The mix bus amp is not used on the E26 cards.

Instead, there is effectively the same thing on each of the six E256 cards in the 688V section.

Anthony.

5

4K,6K,8K Series / Re: Noise from 688?

« Last post by Alex J Kramer on September 25, 2025, 09:16:32 PM »

Greetings,
You could try and float every channel to remove them from the A,B,C buss.
This will just verify that it is not a problem with one of the channels.
Float is the only way to remove the channels from the master busses.
Also, mute and turn down the level of the reverb returns.

When I mix, I float any channel that is not in use.
It reduces the noise floor significantly.

Good Luck.

Thnx a lot, tlamix!
I did that but the problem is still there.

Here's one possible reason(see attachment).
Is that some kind of mod?
Both '26 cards without c1 and c2

6

4K,6K,8K Series / 688 purpose

« Last post by jimlfixit on September 25, 2025, 08:12:55 PM »

I have read these comments and regardless of any noise problems, the 688 early or later versions were not rarely meant for normal recording studios. The three stereo mix buses were designed for Music, Effects and Dialog for film and/or broadcast.
I built all the early ones at SSL (was there from 1980-87) with just a 681 sized panel and 3 big pcb's hanging off the back and also the later ones on the 6K consoles with the rack, a bit like the 651 centre section rack but smaller.
Both were designed by Trevor Stride at SSL, a design engineer who also designed some of the 5K series console Pan and compressor modules.
I also wired a unique  one off 4 buss 688 rack for a USA studio at SSL which involved a lot of mods to the back plane and I wonder where this is now in the USA?
Good luck with your noise problem and I can't help with that as I just wire things and am not technical.
Regards from Jim Lassen in Maidenhead, Bucks, UK

7

4K,6K,8K Series / 50 way S14E IDC connector crimping

« Last post by jimlfixit on September 25, 2025, 08:01:42 PM »

Yes. they can be difficult to crimp those 50 plastic IDC headers or even the free socket versions. It's all to do with taking your time and using a vice properly. I had a proper crimp tool but no more.
I would suggest putting some double sided tape on the top bit (not the main bigger version). The crimps will cut through this to make a connection.
Put the whole connector in a vice and gradually tighten it end BY end but make sure the 50 way cable is 45 degrees (square) to the main part before crimping otherwise you may have pin 1 merging into pin 2 etc (dificult to explain in writing).
I have done this many times before with inferior connectors without any glue. Just takes time otherwise you may ruin the whole connection and have to start again.
Hope this helps from Jim Lassen in Bucks, UK

8

4K,6K,8K Series / Re: Noise from 688?

« Last post by tlamix on September 25, 2025, 01:30:20 AM »

Greetings,
You could try and float every channel to remove them from the A,B,C buss.
This will just verify that it is not a problem with one of the channels.
Float is the only way to remove the channels from the master busses.
Also, mute and turn down the level of the reverb returns.

When I mix, I float any channel that is not in use.
It reduces the noise floor significantly.

Good Luck.

9

4K,6K,8K Series / Re: Noise from 688?

« Last post by radardoug2 on September 24, 2025, 10:22:35 PM »

Well, your little video gives us no idea on what level the noise is at, and what you have connected, or anything. Get yourself a good milivoltmeter, and measure the signal to noise. Looking at graphical tools like you are is often unrealistic.

10

4K,6K,8K Series / Noise from 688?

« Last post by Alex J Kramer on September 24, 2025, 09:33:53 PM »

Hi Fam,
How its going there?)))

Today I've start to mix an jazz album and mention(also producer and musicians) that weird annoying noise(see link). It's present on A B C busses with all channels muted so I decided to re-schedule mixing session and fix that. The biggest problem - I have no idea about what should I do and how.
Please help!


https://drive.google.com/file/d/1esSieLNsKN-b4dqEc-VdqFZKLlbAxiL5/view?usp=share_link