ROYAL OPERA HOUSE CALREC REFURB

With a comprehensive range of mixing consoles, Calrec has been a manufacturer of high quality audio products since 1964.

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Re: ROYAL OPERA HOUSE CALREC REFURB

Postby sebastian747 » Thu Jun 03, 2010 9:20 am

Oh and for what it's worth Calrec have an archive that goes back to 1997 which ties with johns thoughs. Calrec have said they will still offer me support for the console even though some components are obsolite.
sebastian747
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Re: ROYAL OPERA HOUSE CALREC REFURB

Postby sebastian747 » Fri Jun 11, 2010 8:33 am

So any of you guys know much about plasma meters? rumour has it they look great but are actually a complete pain in the bum. The question is are there plasma meters still available, or if not how about a good alternative. Im asking this because something tells me that although we have yet to see if they work..there is every chance a few may not. Anyway any thoughts welcome. thanx
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Re: ROYAL OPERA HOUSE CALREC REFURB

Postby Matt Syson » Fri Jun 11, 2010 8:47 am

Hi
Are they actually plasmas? I thought they were 100 segment LED as used on the UA8000. The LED displays themselves may be tricky to find now (tell me if you do find any!).
The glass plasma displays were used by AMEK, SSL and Neve among others and all implementations have a distinct PITA quality to them! It is a toss up as to whether the plasma display is faulty or the drive electronics is playing up, all combined with 250 Volts DC to play with.
The LEDS I think you have are somewhat easier and safer to work on.
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Re: ROYAL OPERA HOUSE CALREC REFURB

Postby sebastian747 » Fri Jun 11, 2010 8:57 am

Hi Matt,
Ah you may well be right, currently the console is not in our workshop it is in storage for another week or so, the guy i bought it from messed up by saying all the cables and wiring schedule were present...turns out they were not, they are just getting the missing bits together, we went to collect it and could'nt so at the moment its just thoughts from a distance ...we pulled out modules and it looked very clean ...any thoughts on what im up against?
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Re: ROYAL OPERA HOUSE CALREC REFURB

Postby Matt Syson » Fri Jun 11, 2010 9:42 am

Hi
Realistically, a huge bowl full of exchanged capacitors!
I only remember the glass plasmas being on a desk for COI and possibly one for EWART TV (I don't know where that thought or name came from)!
Look forward to hearing when you get your hands finally on it.
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Re: ROYAL OPERA HOUSE CALREC REFURB

Postby sebastian747 » Fri Jun 11, 2010 1:47 pm

If you dont mind my asking matt, how come you seems to have so much info on Calrecs?
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Re: ROYAL OPERA HOUSE CALREC REFURB

Postby Matt Syson » Sun Jun 13, 2010 10:49 am

Hi Sebastian
I was in the desk test department from about 1983 (or was it 84) for about 5 years (complicated because they 'teamed up' with AMS for some of this time). I was involved with testing your ROH desk, and most others except mini mixers from that time period. I only worked on a couple of the UA8000s as I tended to work on the 'broadcast' stuff. I preferred broadcast as there was more 'interesting stuff' rather than 64 identical channels on a UA8000!
Alas I did not retain copies of all the documentation although I have a few 'bits and pieces' and when 'jogged' a fairly good memory!
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Re: ROYAL OPERA HOUSE CALREC REFURB

Postby sebastian747 » Thu Jul 01, 2010 3:03 pm

So its been a while since i posted an update on the ROH Calrec...well the reason was that when we went to collect it the wiring schedule did not match the console, and most of the rather posh looms were missing. So for the last few weeks the guys at the ROH have been busy making up the correct cables to the correct schedule using amphenol mil spec connectors.
So today It was delivered to our workshop where it will be given a full test. Pleased to say that the paper work is amazing, blue prints, test sheets, schematics, the whole lot , it seems a certain P M Syson was something to do with it...hmm wonder who that could be?? .
Ive posted some more pix, i think the meters are as Matt says, not Plasma, thank god for that. Pulled channel 40 out and found an interesting note on the side :
"phase very dirty switch,EQ cutting in and out, Mic gain intermittent,Audio cuts in and out on fader too, fader chucks out noise when no audio, suspect fault on input fader also,gave up on test as everything cut out 21st sept 2000"
well gotta giggle..lets hope the other 39 are not so bad.
Can anyone tell me what the buttons on the Master section do, SM, M/S omni and M/S patch ?
You can also see the console on its side using the custom frame, this makes moving it easy, great idea. The Audio precision in the background warming up for some hard work. Next week its test time..
Attachments
console on side.jpg
channel 40.jpg
meter inside.jpg
Amph mil cons.jpg
masterbluprint.jpg
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Re: ROYAL OPERA HOUSE CALREC REFURB

Postby Matt Syson » Thu Jul 01, 2010 4:12 pm

Hi
They are not plasmas.
Yes I tested it originally but was not as Calrec when it came back for a 'rebuild'.
{Can anyone tell me what the buttons on the Master section do, SM, M/S omni and M/S patch ?}
Not specifically however it will be on the big 'block' diagrams in pretty full detail so you should be able to work it out.
There were some slightly 'out of the ordinary' requirements on this desk which you would have to be in the same mindset as the original operators to understand, certainly not usual 'PA' or recording gear!
If you feel inclined to scan / photo some of the diagrams I can probably help with various questions.
Dirty switches and pots are the most likely culprits for failures although caps will come next.
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Re: ROYAL OPERA HOUSE CALREC REFURB

Postby sebastian747 » Mon Jul 05, 2010 3:58 pm

So started today tipping the desk over so we can begin work on it.
Took the PSU's out of the huge Ash rack they came in. You have to start somewhere so Power seems a good place.
There are six in total, and it means taking the lids off, having a good close visual inspection, looking for anything obvious that maybe wrong, so fuse check , earth bonding, component condition. 4 of six check out great, so straight over to the VariAc to slowly put some power through the units. Two show signs of cap problems and one has a very iffy Relay. Anyway nxt job will be to recap all the PSU's apart from the big blue boys which look good and measure out ok in circuit. In the photos u can see the difference between a sweet looking Phantom PSU, and the fairly hot looking logic PSU which seems to have gone bang at some point, brittle wires and plenty of smoke damage (this has the noisy relay)
Attachments
IMG_0656.jpg
IMG_0658.jpg
IMG_0655.JPG
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