CALREC Pre-Amp / EQ Channel Module PQ 1253

[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