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Author Topic: SSL 4000 G Mods???  (Read 33690 times)

jwhmca

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SSL 4000 G Mods???
« on: August 29, 2008, 11:25:04 AM »

Hello all,

First I would like to thank you all for the wealth of information!

Here is my situation/story/problem...

I am the resident head tech at a relatively "new" studio. We have an SSL 4000 G series, 80 channels. I'm in the process of bringing this 20 year old behemoth back to life. I recently finished recapping all 80 channels... ( yes, full recap on all 80... God bless the sc-7000z)

The center section has been recapped to some degree (Bruce@deskDoctor), before I came on the scene.

My area of expertise, before I was gifted with said opportunity, was T.V. Repair... Don't laugh! Well maybe just a little... Long story (family business.) As I worked through the many dead channels, broken EQ's, toasted compressors, busted VCA cards, No Cut, No Solo, Wigged out Plasmas, Fried Faders... I could go on and on... I began to realize... This design has Huge room for improvement!

Now that all 80 channels are alive and mostly well...( What the heck do you do with all those Diseased Pots&Switches???)

I'm left wondering... Mods? Caps to Bypass? Opamps? Caps to upgrade or remove? Has anyone gone through the extensive "Alignment protocol"? Has it helped?

Any ways... All thoughts and ideas would be greatly appreciated!
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amorris

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Re: SSL 4000 G Mods???
« Reply #1 on: August 29, 2008, 12:47:20 PM »

The last studio I worked pulled out all the preamps and put transformer balanced pres, reworked the power on the motherboards,.....BIG JOB. John Musgrave. Dont know if he'd spill the beans.
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ssltech

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Re: SSL 4000 G Mods???
« Reply #2 on: August 29, 2008, 01:00:12 PM »

SSL Plasmas... -hate them. -Pretty when they work, but UGLY when they don't.

Switches: throw them away or send them to China for recycling into firelighters or iPhones.

Pots shouldn't be too bad. -If you think that SSL clarostat pots are failure-prone, just WAIT until you have the "pleasure" of working on a Neve V-series!!! Very Happy

Mods: I used to manufacture and sell replacement EQ boards, (AAD) Leif Mases made an another alternative EQ board (Maselec). Alan Smart makes a couple of retrofit boards; input & group Amplifier, I think, (Smart Research).

Notice how none of us became wealthy enough to buy small private islands from selling this stuff: That's because no matter HOW many boards you retrofit, there are SO MANY inter-board connections that the sound is compromised dramatically, and that's where a lot of that "SSL E/G-series sound" (which they worked so hard to shake off with the 9000 series) comes in. In the 9000 they eliminated almost ALL of the inter-bard connections, and hard-soldered EVERYTHING that they possibly could. -it made a COLOSSAL difference.

So the E and the G-series are both VERY easy to service (again, if you think they're in any way difficult to work on... ask a Neve tech!) but have compromised sonics... and -unless you REALLY start re-designing and re-building and hard-soldering almost EVERYTHING... you'll never shake it off.

The best way to dramatically change the sound is to buy a different console.

-But overall I do love them to work on. -The alternatives are sometimes horrific!

Keith
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MDM (maxdimario) wrote on Fri, 16 November 2007 21:36

I have the feeling that I have more experience in my little finger than you do in your whole body about audio electronics..

Geoff Doane

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Re: SSL 4000 G Mods???
« Reply #3 on: August 29, 2008, 01:57:06 PM »

We're just coming to the end of a month long refurbishing of a 4000 G+.  We replaced all the 6PDT switches on the EQ and dynamics switch cards, and some of the DPDT switches on the main boards that were suffering (ran out of switches, but things are much better now).

The other really weak part of the console was the AUX send mute switches on the back of the pots.  Since no one actually used that function in the middle of a mix, I just bypassed them (moved wires on the back of the switch).  As Keith said, the pots themselves seem to be fine.  I did find one though where the wiper of the TR deck shorted to the chassis when it was turned fully ccw.  THAT made the logic go berserk!  

The G+ also can send the Stereo Cue to either the stereo cue buss or extra groups 25-32.  Now the switch is out of the circuit, and both are fed at the same time.

We also bypassed all the similar switches in the center section for the AUX and extra group masters.

I replaced all the SOLO lamps with LEDs about a year ago, and all the CUT lamps will be next.

GTD
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ssltech

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Re: SSL 4000 G Mods???
« Reply #4 on: August 29, 2008, 02:14:40 PM »

The AUX MUTE switches... -if they're the black/very dark brown Schadow type, they can be brought back to life for a few years by using a PCB component-leg hole type drill and spraying Miller $ Stephenson's "Contact Renu & lube" in the hole. -They stop doing the "fuzz-crackle-Bzzzzt" noise, and work smoothly for several years. -A handy tip indeed!

Keith
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MDM (maxdimario) wrote on Fri, 16 November 2007 21:36

I have the feeling that I have more experience in my little finger than you do in your whole body about audio electronics..

guy_4

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Re: SSL 4000 G Mods???
« Reply #5 on: August 29, 2008, 05:19:30 PM »

Hi Keith,

I share your opinion on SSL " mods" , and agree 100% on these two sentences :

"So the E and the G-series are both VERY easy to service (again, if you think they're in any way difficult to work on... ask a Neve tech!) "

"But overall I do love them to work on. -The alternatives are sometimes horrific! "

I prefer to fix 10 SSL than 1 Neve ! ( in fact I refuse any work on a Neve )
Thanks for the tip for restoration of the AUX MUTE switches.
Do you have the reference of this Miller +Stephenson cleaning product ?
Best,
Guy

PS : how was France this summer ?



Very Happy
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guy_4

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Re: SSL 4000 G Mods???
« Reply #6 on: August 29, 2008, 05:25:22 PM »

Hi Geoff,

"I replaced all the SOLO lamps with LEDs about a year ago, and all the CUT lamps will be next."

What type of LED do you use ?  ( brand/model/dealer )

Best,
Guy
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Dave Hecht

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Re: SSL 4000 G Mods???
« Reply #7 on: August 29, 2008, 06:11:16 PM »

Keith pretty much nailed it. Couple of things to add. I've seen a few mods to the main mix amps, mostly Burr Brown chip upgrades (OPA2134 or OPA604 as I recall). Nothing spectacular - made a slight difference. Could be done fairly inexpensively if you want to try it.

The most common switch failure I've had is the bus assign switches. Back in the days when SSL supported the E/G series, I'd just swap the cards out. Now,I've started replacing the individual switches. If you've got the later type cards, the switches are individual - the older cards need all 4 replaced. Digikey carries a switch that fits for around $1/ea, so pretty worthwhile to keep the old cards working. Last time I had to find NOS cards for a client they were $42/ea

Dave Hecht
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ssltech

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Re: SSL 4000 G Mods???
« Reply #8 on: August 30, 2008, 09:34:35 AM »

guy_4 wrote

how was France this summer ?


Sadly, it was quite wet most of the time that I was there.

Spent most of the time in a hotel room (NICE location, between Rue de Rivoli and Rue St. Honor
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MDM (maxdimario) wrote on Fri, 16 November 2007 21:36

I have the feeling that I have more experience in my little finger than you do in your whole body about audio electronics..

Jim Williams

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Re: SSL 4000 G Mods???
« Reply #9 on: August 30, 2008, 10:53:52 AM »

The largest improvement I have heard is on the master mix card. Replace the National LM394 transistor pair with an AD MAT-02. The 5534 opamp needs to go, I had great results with a National LM6171 at 3600v/us slew rate and 100 mhz gain bandwidth. The Roederstein bipolar caps are too soft sounding, replace with low impedance polarized caps once you determine the correct polatity via measuring offsets first. If you replace the 5534's with LME49710's you can sometimes remove the output coupling cap as the offsets are very low. That also applies to the 5532's, use either LME49720 or LME49860.
The quad tlo74 opamps on the monitor card should also go, use either a Linear Tech LT1359 or a National LME49740. Increase the size of the output coupling caps, especially the small 10 uf Roederstein's used in front of the VCA's, that's a low end phase shifter.
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Jim Williams
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jwhmca

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Re: SSL 4000 G Mods???
« Reply #10 on: August 31, 2008, 11:18:15 AM »

Thank you all for the thoughts and ideas!

Jim, by the "Master mix card" do you mean the 4 QB cards in the center section?

Keith, I haven't replaced any of the switches yet... I just have noticed they seem to distort if not wiggled into the right position. Spraying de-ox down into them doesn't seem to help. I haven't tried drilling any holes...

Geoff,

I'm not sure what you mean by this...

"The other really weak part of the console was the AUX send mute switches on the back of the pots. Since no one actually used that function in the middle of a mix, I just bypassed them (moved wires on the back of the switch)."




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sodderboy

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Re: SSL 4000 G Mods???
« Reply #11 on: August 31, 2008, 12:04:29 PM »

The only pots that have failed for me are the filter pots.  The OFF switch element goes bad and the EQ is disabled.  I always just replaced them and never tried to open them and see what broke mechanically.
All other switches I replace after cleaning a few times.  You can never get enough of the original lube back in the switch once it is flushed.  I did two buss ultrasonic cleaning projects way back but would never do it again.  It is more time efficient to replace switches than do a 7 or 8 step procedure on switches every 2 years.

Whatever you do, get a electrolux style camelhair brush attachment, cut the inside tube down, put a 1/4" screen inside, connect it to a good canister vac, and train someone how to clean the console and equipment every week.  That is the next best thing you can do besides keeping it cool and dry.

And I agree with the modding aspect.  Your studio's business model includes an 80 input SSL.  Use it as is.
Mike
PS: the AUX switch change mentioned was to simply wire the AUX ON all the time, rather than deal with spotty switches.
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Geoff Doane

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Re: SSL 4000 G Mods???
« Reply #12 on: August 31, 2008, 09:00:08 PM »

guy_4 wrote on Fri, 29 August 2008 18:25

Hi Geoff,

"I replaced all the SOLO lamps with LEDs about a year ago, and all the CUT lamps will be next."

What type of LED do you use ?  ( brand/model/dealer )

Best,
Guy


I guess it was more like two years ago  Embarassed , but here's the last post of that thread:

http://recforums.prosoundweb.com/index.php/m/206834/0/#msg_2 06834


As sodderboy noted, the AUX switch mod involved moving the wire that runs from the wiper of the AUX pot to the center terminal of the switch, to the rear terminal of the switch, effectively making the switch always "ON".  

I haven't had much luck with spray cleaners/lubricants over the long term, although I haven't tried the Miller + Stephenson stuff.  Typically things improve for a little while, and then the lubricant attracts new garbage, and things are worse than ever.  I've received some positive comments about the lighter touch of the Alps switches compared to the original Schadows.  So far, they seem to do a good job of passing audio too  Smile

GTD
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CWHumphrey

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Re: SSL 4000 G Mods???
« Reply #13 on: September 30, 2008, 02:23:37 PM »

So many mods...

First, as I'm you've noticed, each module is riddled with 5534 op amps.  I haven't done the tech. thing for going on a decade but Dave knows chips that are drop in upgrades to the 5534...because we talked about this about 15 years ago.

Another great mod that will make your life easier in the long run is to lose the 2 stab type lamp in each VU meter.  The bulbs are a pain to replace and sometimes just intermittently turn off.  Go with LEDs.

Cheers,
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Carter William Humphrey

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patevil

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Re: SSL 4000 G Mods???
« Reply #14 on: October 28, 2008, 10:45:15 PM »

Are there any recommended mods. for the center section of the 6000 E series?

am about to dive into a recap job for this console.  just looking for some assistance while i have her shut down.  

I am also going to do the power supply any recommendations there as well?

cheers
PF

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mobilemozart

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Re: SSL 4000 G Mods???
« Reply #15 on: February 03, 2009, 07:59:23 AM »

bump...

About to buy a used refurbished 4000E or G...

Me and a friend of mine whose a pretty good tech are excited about servicing the SSL and possibly improving it.

It would be great to have some people to chime in with some of their experiences.

Few random thoughts:

- signal path of G/G+ Center Section cleaner than E Center Section? True? Why? Can be modded?

- what's to cleanest path for a stereo DAW out? Echo Returns? I like the mojo of the channels but like to be able to have a really clean stereo DAW path that doesn't do much to the signal.

Please, please, share your experiences!

Thanks,
Marc
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zmix

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Re: SSL 4000 G Mods???
« Reply #16 on: February 03, 2009, 12:43:48 PM »

mobilemozart wrote on Tue, 03 February 2009 07:59

bump...

About to buy a used refurbished 4000E or G...

Me and a friend of mine whose a pretty good tech are excited about servicing the SSL and possibly improving it.

It would be great to have some people to chime in with some of their experiences.

Few random thoughts:

- signal path of G/G+ Center Section cleaner than E Center Section? True? Why? Can be modded?

- what's to cleanest path for a stereo DAW out? Echo Returns? I like the mojo of the channels but like to be able to have a really clean stereo DAW path that doesn't do much to the signal.

Please, please, share your experiences!

Thanks,
Marc




The G / + had balanced busses and was quite a bit quieter as a result.  Bus noise is generally pretty low in the E but a bit higher if your console has TR.


compasspnt

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Re: SSL 4000 G Mods???
« Reply #17 on: May 12, 2009, 10:09:53 PM »

What is involved in "removing" TR, and/or removing other computer functions?

With automation today from PT, I would now not mind just getting rid of as much "extraneous stuff" features on my 4000E as possible.
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tom eaton

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Re: SSL 4000 G Mods???
« Reply #18 on: May 12, 2009, 11:04:00 PM »

Hey Chuck-

How does TR add to the noise floor?  Is it just the VCAs in the fader path, or something else?

My Otari has their version of "total recall" and it never occured to me that it could be a negative sonic issue... I just assumed it was measuring a resistance against ground and storing that value for each pot.  I would love a little tech explanation of what's really going on!

Thanks-

t

ps- why can't someone add VCA, fader, eq and daw to the dictionary at psw for the spell checking?  even "psw" gets the old red underline.

zmix

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Re: SSL 4000 G Mods???
« Reply #19 on: May 13, 2009, 01:57:17 AM »

tom eaton wrote on Tue, 12 May 2009 23:04

Hey Chuck-

How does TR add to the noise floor?  Is it just the VCAs in the fader path, or something else?



TR works by supplying a voltage across an extra potentiometer element ganged on the back of each pot and measuring the voltage at the wiper.  This allows the position of every aux send, EQ setting, compressor etc to be recorded and later (manually) reset.


The TR scan is only active during a save or recall and does not usually add any additional noise otherwise.




index.php/fa/12180/0/

Dave Hecht

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Re: SSL 4000 G Mods???
« Reply #20 on: May 13, 2009, 02:19:49 AM »

compasspnt wrote on Tue, 12 May 2009 19:09

What is involved in "removing" TR, and/or removing other computer functions?

With automation today from PT, I would now not mind just getting rid of as much "extraneous stuff" features on my 4000E as possible.



Terry,

 The recall can be removed by removing the multiplex cards from the channels. The entire fader/mute automation can be bypassed by removing the 50 way ribbon cables between the console & computer and replacing them with jumpers at the console end. SSL used to supply the jumpers, I believe they were just a piece of 25 way ribbon looped in the 50 way connector, connecting the computer sends and returns for the vcas

Dave Hecht
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compasspnt

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Re: SSL 4000 G Mods???
« Reply #21 on: May 13, 2009, 02:51:23 AM »

Thanks Dave. Is there any advantage to doing this, or am I "wishful focusing?"


AQlso, related to another previous thread, who has found a good supplier for replacing the many T5.5 bulbs with an LED replacement?

Thanks all.
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ssltech

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Re: SSL 4000 G Mods???
« Reply #22 on: May 13, 2009, 10:09:08 AM »

Speaking for Dave without permission here, but there's no benefit of which I can conceive from pulling TR... -Unless you want to sell it of course. -In fact have a TR buyer waiting, and I'll happily put anyone who wants to swap the necessary TR parts for money in direct contact; -I have no financial interest or vestment. -If you DO remove the TR cards as detailed in Dave's post, you'll also have to re-solder the 611 (channel strip) motherboard jumpers from "mpx" to "non-mpx" -I think it's two jumpers per 611. -Not a big job at all.

TR was noisy when running (you're probably familiar with the "Frrrrrrr-ikka-tikka" noise which pervades the background of TR playbacks!) but didn't add any noise when not activated.

To be honest, you'll likely get a greater noise improvement from removing the in-console CRT screen and replacing it with an LCD panel. I've had some luck in the past picking up screens from http://www.ebay.co.uk (note: British eBay), since the screen connector to the console carries composite video, 12VDC and ground. Any PAL LCD composite monitor which will work in a car should therefore work in an E or G series.

In fact you CAN use an NTSC monitor and get a picture, but the bottom 100 scan lines will be missing, so the last couple of items on mix lists, cue lists, TR lists etc will not be visible... -Workable in a PINCH... but not a doable solution. -IN fact, one time we actually rigged one of those "clamshell" portable DVD players which has an external video input connector, and an external 12VDC connector... and rigged it right on the meterbridge as a swift work-around.

Anyhow, getting rid of the CRT screen has brought benefits, and people have also commented that they've found the LCD image clearer/more stable/more pleasant to look at...

The Jumpers of which Dave speaks are in fact just 8-way ribbons looping the eight "fader send" pins to the
"fader return" pins, but there should be NO audible benefit in replacing the computer with ribbons, since the signal at that point is DC, and I can't hear DC very well! Wink There's no 'scanning' of the faders taking place in the console, so no noise to be removed. Only when TR is active do the eight little buffers in  the center section broadcast their evil little messages down the lateral antennae... -sorry, "TR buses"... which makes the background "fritttta-tikkka" during TR resetting.

Hope this helps more than it obfuscates... (-with my explanations, -you never really know!)

Keith
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MDM (maxdimario) wrote on Fri, 16 November 2007 21:36

I have the feeling that I have more experience in my little finger than you do in your whole body about audio electronics..

Dave Hecht

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Re: SSL 4000 G Mods???
« Reply #23 on: May 13, 2009, 01:18:38 PM »

Terry,

as Keith said, no sonic advantage to removing TR. As for selling the parts, strictly up to you, but it will reduce the consoles resale value and most likely make it far more difficult to sell.
There should be no audible difference in bypassing the computer, as the audio circuitry will remain the same.

Dave Hecht
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compasspnt

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Re: SSL 4000 G Mods???
« Reply #24 on: May 13, 2009, 01:40:17 PM »

Thanks guys.

So why bother then?  I'll just leave it alone.

I just get tired of rebooting the software (we have power dips occasionally that set it off).


Now, to find those LED bulbs...
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ssltech

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Re: SSL 4000 G Mods???
« Reply #25 on: May 13, 2009, 03:08:18 PM »

One local studio has an Ex-BBC 4000. Most of the BBC ones apparently came with the (1 rack-unit) computer bypass module. -You can throw a switch on the front and bypass the computer completely, yet still retain subgrouping and master fader functions, in the event of power outages etc.

-In fact, he's the guy looking to buy TR, since apparently 'auntie Beeb' didn't think TR was worth ordering. -Maybe he and you should trade! Wink

-I kid... -I kid!

Keith
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MDM (maxdimario) wrote on Fri, 16 November 2007 21:36

I have the feeling that I have more experience in my little finger than you do in your whole body about audio electronics..

John Monforte

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Re: SSL 4000 G Mods???
« Reply #26 on: May 15, 2009, 01:48:09 AM »

Terry,

I have chimed in on the past discussions regarding LED replacements. At the time the vendors I had suggested were Data Display Devices (DDP) and Ledtronics. I had used them both as well as SSL (who no longer carries them).

The problem is that these companies want large orders and are generally a hassle. Getting 50 of these and 70 of those etc. is not appealing to them so it can get pricey. They used multiple LED chips to get the brightness they need, but today regular high intensity LEDs are good enough.

Nowadays, I make my own with a 2.2k 1/8 watt resistor and a high intensity LED. I get a dead bulb and crush it with pliers and put the new parts in the base. The benefit is that you can use any of the available colors. Now they even have cyan and pink!

As it happens I am doing two desks right now. I go through one color at a time, harvesting good bulbs to replace the others until its time for their color.

I could whip up a batch for you if you like.
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From conception to posterity through invisible technology.

compasspnt

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Re: SSL 4000 G Mods???
« Reply #27 on: May 30, 2009, 07:01:11 AM »

John Monforte wrote on Fri, 15 May 2009 01:48

I could whip up a batch for you if you like.



Thanks John!

I am now saving my old bulbs.

Wish I had known of this about 500 burned out bulbs ago...
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nicpope

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Re: SSL 4000 G Mods???
« Reply #28 on: September 23, 2009, 02:16:04 PM »

Dave Hecht wrote on Fri, 29 August 2008 17:11

Keith pretty much nailed it. Couple of things to add. I've seen a few mods to the main mix amps, mostly Burr Brown chip upgrades (OPA2134 or OPA604 as I recall). Nothing spectacular - made a slight difference. Could be done fairly inexpensively if you want to try it.

The most common switch failure I've had is the bus assign switches. Back in the days when SSL supported the E/G series, I'd just swap the cards out. Now,I've started replacing the individual switches. If you've got the later type cards, the switches are individual - the older cards need all 4 replaced. Digikey carries a switch that fits for around $1/ea, so pretty worthwhile to keep the old cards working. Last time I had to find NOS cards for a client they were $42/ea

Dave Hecht


Hey Dave,

Any chance Digikey still carries this part and you would have a part number?

Thanks!
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mobilemozart

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Re: SSL 4000 G Mods???
« Reply #29 on: September 23, 2009, 02:59:45 PM »

nicpope wrote on Wed, 23 September 2009 20:16

Dave Hecht wrote on Fri, 29 August 2008 17:11

Keith pretty much nailed it. Couple of things to add. I've seen a few mods to the main mix amps, mostly Burr Brown chip upgrades (OPA2134 or OPA604 as I recall). Nothing spectacular - made a slight difference. Could be done fairly inexpensively if you want to try it.

The most common switch failure I've had is the bus assign switches. Back in the days when SSL supported the E/G series, I'd just swap the cards out. Now,I've started replacing the individual switches. If you've got the later type cards, the switches are individual - the older cards need all 4 replaced. Digikey carries a switch that fits for around $1/ea, so pretty worthwhile to keep the old cards working. Last time I had to find NOS cards for a client they were $42/ea

Dave Hecht


Hey Dave,

Any chance Digikey still carries this part and you would have a part number?

Thanks!


+1, yes that would be amazing! Thanks!
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Jim Williams

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Re: SSL 4000 G Mods???
« Reply #30 on: September 24, 2009, 10:21:41 AM »

The small Alps push switches can be had from Mouser for 70 cents @100 pieces. P/N 688-SPUJ190900

For led's,
www.superbriteleds.com

They have most colors and a special incandescent color temp led that is ideal for replacing incandescent bulbs for that old time look. For a modern look, use standard white leds.

For SSL stereo buss amps, I use a matched pair of Hitachi 2SA2545 transistors (1/2 the noise of the LM394) and a National LM6171 opamp at 3600 v/us slew rate, that will open up the mix like after your ears pop landing in a jet. Good caps with quality film cap bypasses are also helpful. Then dump the 074's in the monitor card with LT1359's and then you can hear it. Dump the Roederstein bipolar electrolytics with low impedance polarized units properly oriented. Bypass those with film caps. Replace the 10 uf cap in front of the VCA with 47 uf, then you get some low end and remove some phase shift.
Be happy.
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Jim Williams
Audio Upgrades

Dave Hecht

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Re: SSL 4000 G Mods???
« Reply #31 on: September 24, 2009, 01:38:39 PM »

nicpope wrote on Wed, 23 September 2009 11:16

Dave Hecht wrote on Fri, 29 August 2008 17:11

Keith pretty much nailed it. Couple of things to add. I've seen a few mods to the main mix amps, mostly Burr Brown chip upgrades (OPA2134 or OPA604 as I recall). Nothing spectacular - made a slight difference. Could be done fairly inexpensively if you want to try it.

The most common switch failure I've had is the bus assign switches. Back in the days when SSL supported the E/G series, I'd just swap the cards out. Now,I've started replacing the individual switches. If you've got the later type cards, the switches are individual - the older cards need all 4 replaced. Digikey carries a switch that fits for around $1/ea, so pretty worthwhile to keep the old cards working. Last time I had to find NOS cards for a client they were $42/ea

Dave Hecht


Hey Dave,

Any chance Digikey still carries this part and you would have a part number?

Thanks!


The info I have on the switch is C&K #PHA2UEE (Digikey part # 401-1192)
I got a few from a friend, haven't needed to order them myself, so don't know if they're still available from Digikey, but you should be able to do a search on their website.

Dave Hecht
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nicpope

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Re: SSL 4000 G Mods???
« Reply #32 on: September 24, 2009, 02:29:19 PM »

Jim Williams wrote on Thu, 24 September 2009 09:21

The small Alps push switches can be had from Mouser for 70 cents @100 pieces. P/N 688-SPUJ190900

For led's,
www.superbriteleds.com

They have most colors and a special incandescent color temp led that is ideal for replacing incandescent bulbs for that old time look. For a modern look, use standard white leds.

For SSL stereo buss amps, I use a matched pair of Hitachi 2SA2545 transistors (1/2 the noise of the LM394) and a National LM6171 opamp at 3600 v/us slew rate, that will open up the mix like after your ears pop landing in a jet. Good caps with quality film cap bypasses are also helpful. Then dump the 074's in the monitor card with LT1359's and then you can hear it. Dump the Roederstein bipolar electrolytics with low impedance polarized units properly oriented. Bypass those with film caps. Replace the 10 uf cap in front of the VCA with 47 uf, then you get some low end and remove some phase shift.
Be happy.


Hey thanks for the part number on those switches Jim.

I just put LED's in all of my switches, but I got them from Recycled Audio. Pretty reasonably priced and they have been a pleasure to work with.

I basically need to replace half the bus assign switches in this desk, anyone have any tips for desoldering these things?
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Jim Williams

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Re: SSL 4000 G Mods???
« Reply #33 on: September 25, 2009, 09:58:32 AM »

Hakko 808. Get one from:
www.testequipment.net
They discount them to $180.
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Jim Williams
Audio Upgrades

mobilemozart

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Re: SSL 4000 G Mods???
« Reply #34 on: September 26, 2009, 09:38:14 AM »

Jim Williams wrote on Fri, 25 September 2009 15:58

Hakko 808. Get one from:
www.testequipment.net
They discount them to $180.


http://www.tequipment.net/Hakko808.html
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jwhmca

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Re: SSL 4000 G Mods???
« Reply #35 on: October 14, 2009, 01:33:40 PM »

The Den-on sc7000z is great as well...

Anybody know a good replacement switch for the Dynamics/EQ Channel in switches?

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