CALREC Pre-Amp / EQ Channel Module PQ 1253

[Ben M]

Hi Heath

No probs. PM me your email and I will send the pinouts and diagrams through. I have some other info on the Calrec which I'll send aswell.

I sold both of my Calrec modules to someone in Melbourne about 18 months ago, so I never got around to racking them.

cheers

[heathen]

Schweet, the nice fellow accepted my offer sooooo I got the pair with sequential serials. Stokified! :)

Now in the the photos there are 2 boards, one connected to the main board via a connector, this one has 2 transformers on it, though I think this is the preamp stage and NOT the output card. Orrrr am I wrong?

Anyway I could probably track down some output cards which could be a major PITA or hopefully Rob can interface it with the real world somehow (which I'm sure he can), either way I don't think it should be too big a deal.

I'll post some pics when they arrive, probably in about a week or 2.

[mylesgm]

if you find out what module you need for output i have two stereo output boards lying around in my cupboard... let me know the module number and i reckon we can work something out..

[heathen]

if you find out what module you need for output i have two stereo output boards lying around in my cupboard... let me know the module number and i reckon we can work something out..

Thanks Myles, that would be great. I know it has a Lundahl LL1517 transformer, but can't find the card number anywhere. Does anyone know what it is??

I found a diagram on gyrafs website if that helps indentify them?

Any chance you can post the card numbers and I can do a search to make shure they are the ones?

Thanks

[ChrisW]

I had a lot of loose modules when I arrived in Australia.
Rob has racked most of them for me with excellent results.

[heathen]

I had a lot of loose modules when I arrived in Australia.
Rob has racked most of them for me with excellent results.

Yeah Rob does great work, he's done some ANT and Lawo modules for me in the past which sound very nice.

Once I get these done I've got a pair of Tele v676b's to get done though I have these other 2 Tele IPS F2000 eq's as well, I was thinking I should get them racked with the Tele pre's into the same box so I can patch them in if needed.

Then theres a draw full of other Neumann and Tele goodies to be done later.

Calrecs and Telefunkens first though.

[TimS]

Gee Heath, how much EQ do you need?
;-)

[heathen]

Gee Heath, how much EQ do you need?
;-)

More! :)

Well I just really want to use as few plugins as possible and make sure I have a nice selection of different tones to choose from which are high quality.

Though these I mainly bought just for a different coloured front end. If I don't like em they will be sold. Though I think I'm gonna like them.

Still want a GML too.

[heathen]

I emailed Dan Alexander and he said he's sure he has the line amps I'm after, said he has plenty, in case anyone else needs any.

I don't think these ones are stereo Myles. Just wanted to make sure I got the correct ones as some folks on GS believe using the originals is the way to go.

[mylesgm]

I have 2 XL1670 cards with lundahl LL1517 output tx's onboard. These are two channel output boards if that helps let me know.

cheers
MYles

[heathen]

I have 2 XL1670 cards with lundahl LL1517 output tx's onboard. These are two channel output boards if that helps let me know.

cheers
MYles

Hmmmmmm, I could be wrong, they sound like what I need, thanks heaps for checking. I'll have a chat with Rob once integrate is over and see if he thinks they are the correct ones.

I don't see why a stereo card would'nt work if the output gain is at a fixed level anyway.

[mylesgm]

to be honest, I'm not sure if they are 'stereo' or simply two channels on one card. The desk at atlantis is full of this sort of card, I think they are a standard euro-card size so it may just be a space issue. Also the pair that Dave at atlantis racked for the b room has a card very similar to this one as the output stage.
cheers
Myles

[heathen]

to be honest, I'm not sure if they are 'stereo' or simply two channels on one card. The desk at atlantis is full of this sort of card, I think they are a standard euro-card size so it may just be a space issue. Also the pair that Dave at atlantis racked for the b room has a card very similar to this one as the output stage.
cheers
Myles

Ahh thanks Myles that's great to know.

[heathen]

Yay they arrived, no output cards though, oh well. Pre's arrive then laptop dies 2 minutes later. Weird!

[heathen]

[mylesgm]

Heath,

Check out the link below to a pair of calrecs being offered on prodigy-pro. I'm not encouraging a sale here, I'm actually interested in purchasing but note what he says about seperate eq boards at the bottom... And those are the same output boards I have.

http://www.prodigy-pro.com/diy/index.php?topic=34597.0

[heathen]

Hey Myles,

I read what he said and it would seem the PQ 2420 is quite a different configuration, on the PQ 1253's I have there are 2 boards, one seems to be the pre-amp with the 2 transformers and hopefully the eq electronics are on the other which I'm pretty sure they are.

Quote from the info I found:

"PQ1253, PQ1785, PQ1895 Pin Listings

Pin Listings & module descriptions.

If the PQ1740 is a 2-card module, it is likely to conform to the pin-info in this post. As Matt has noted, many modules were based on the same core PCBs and circuits.

The 3 PQ modules noted in the heading are all from the M-Series of Calrec consoles. The PQ1253 only has a mic input stage. The other two have mic and line input stages. Module construction is on 2 PCBs; the smaller right-hand card contains the mic and line input stages, gain switching and source selection. The larger left-hand card has the input level trim, filters and EQ circuits. External connections are via DIN41612 connectors. Only the A-row of each connector is populated. "

My modules internals:





So yeah I probably need 1 of the "XL 1670 dual balanced output boards" to keep it authentic, so please hang onto it for me.

Do you think you will buy the 2420's?

[harry]

Hey Heath,

did you happen to figure out which outpot card matches these pre/eq's?

i have a pair of pq1253's i bought a long time ago and a whole bunch of output cards - but no idea which card is compatible?


i figure it's time i actually rack these up and use em..





Harry. A

[heathen]

I did but can't find the info at the moment, actually Rob said he can most likely make an output for them which should work just fine. So I thought when I get them done i'd go for that option.

If I can find the info I'll post it asap.

[harry]

Hey Thanks Heath!

yeah - i'd love the info if you could find it - last time i checked the card 'bl1496' was what seemed to be needed - i have 2 of these and about 10 other types.... unfortunately i cant find a schematic or pinout anywhere on the net or any info as far as what the pq1253 needs to see on the output...



harryarvanitis

[heathen]

That I can help with Harry, pm your email address and I'll send all the docs I have. The pinout was from a tech on GS who I think worked for Calrec. The schematics scans I have were sent to me by Ben on here.

[heathen]

Actually the output boards could be these "XL 1670 dual balanced output boards" from a few posts back above "the post with the pics", I never confirmed it though as I was just going to hopefully get Rob to sort that out when racking.

[harry]

Hello Heath,

thanks so much for that - now i just have to find the schematics for the output cards and we're in business - this might be a bit trickier...


Thanks Again - hopefully i can work it out as these might sound very nice - if so i might buy a few more channels and rack them vertically in a 4/5ru...

harryarvanitis