Need 1290 and B284 schematics

[dfer]

Hi,

Does anyone have the 1290 schematic? Also has anyone made b284 boards?


B284 gerbers anyone?


Please email - dfer128 (@) yahoo.ie



Thanks,


Dfer.

 

[Michael Tibes]

You could check at Neve, most of the vintage stuff is up there (surprisingly and not to be expected). The 1290 might be called 1073?? with another extension or something alike.

Otherwise, did you do a search here? It is not really a new topic around here.

Michael

 

[dfer]

Hi Michael,

Yes im fully aware that the 1290 is the 1073 minus the Eq section, I was looking at the 1073 GB,but did not find what im looking for. But there was b284 cards for sale on the 1073 GB but it dates back to 2007.







I'll have a look at the Neve website,



Thanks

 

[Svart]

http://www.technicalaudio.com/neve/neve_pdf/1073-fullpak.pdf

Just build a 1272 and add another ba283NV? That's pretty close and cheap plus you get the benefit of being able to drive an output transformer too.

 

[Skylar]

I'm having some BA283 boards made right now.
I have the gerbers for that if you're interested.

It's pretty much a direct copy of the original but I've changed from gold fingers to 5.08mm spaced headers.
I also omitted some of the unused pins.

 

[dfer]

Thanks for the comments guys, I've just realized looking at the 1290 pre schmatic that it consists of a BA283NV + BA283AV.    But on the 1073 schematic it has a BA283NV + BA284 as amp cards....?


Can you claify that my infomation is correct?


And could someone please explain in detail why the two modules are different, as i was under the impression that the 1073 (minus the 3 EQ cards) was a 1290?



Thanks,


Dfer

 

[MagnetoSound]

Thanks for the comments guys, I've just realized looking at the 1290 pre schmatic that it consists of a BA283NV + BA283AV. But on the 1073 schematic it has a BA283NV + BA284 as amp cards....?

... i was under the impression that the 1073 (minus the 3 EQ cards) was a 1290?

The 284 contains an extra amp section that is used in the EQ.

 

[dfer]

Cheers MagnetoSound,


Could someone be so kind and send me the original 1290 schematic please, as i only have a modified 1073 version from Madriaanse's ez1290's.

Someone must have the original 1290 schemo?



Please!

 

[Bluzzi]

Just look at the 1073. Really look! Now I presume you only want a mike preamp without Line in right? Then Remove the part of the switch for Line in and the entire EQ section. You will need a partial BA284 (BA283NV only) and full BA283AV sections.

But why don't you just get Martin's (Madrianse) 1290 PCB? He's already done the work for you.

Jim

 

[dfer]

Hi Bluzzi, no the plan was to add a line input aswell so the EZ1290 is a no go mate.

Thanks.

 

[Svart]

You'll never find a 1290 schematic.  They are extremely hard to find and people have been looking around here for a while.

Now look at the document that I linked to earlier in the thread.

Look at the BA284 connections.  Look for pin U and pin P.

Now scroll down and look at the BA284 schematic.  You will see that pin U is an input and pin P is an output.  Look at the amp sections next to that one.  Notice that they are different?

Now scroll up and look at the BA283 schematic.  Now look at pin U and pin P.  Look familiar?  that's cause it's the same type of amp as the first(preamp) section of the BA284.

Now go back up to the wiring diagram.  Notice how pin P of the BA284 comes out to a switch and then goes to pin U of the BA283?

That's where you get two of the "preamp" sections of the 1290 vs. one in the 1272(which wasn't a preamp BTW..)

Now that being said, have you built the 1272 preamp?  Do you have any Neve style preamps yet?

You owe it to yourself to build a 1272 if you haven't.  It's cheaper and easier(fewer parts) and honestly you'll never know the difference.  The mojo is in the output section of the circuit anyway and having another preamp section won't matter if you are looking for that sound.

I personally have ribbon mics as well as all other kinds of mics and I have never run out of gain with my 1272s.  Heck, I have to PAD the input when using a lot of my mics even at the lowest gain setting!

I just think you are overthinking your project a bit.  Unless you need 70db of gain instead of 50, then try the 1272 first.  You can always wire in another preamp section and get your 1290.

 

[Michael Tibes]

I can only second that, I use microphones into the line ins of my 1073s way more often than the +50 dB gain areas. Normally I only get there with string recordings or acoustic git room mics or such stuff.

Actually rereding the thread I wonder what you're after, what you want to achieve? I believe most of the possibilities have been thought over somewhere or they're at least very easy to derive.

Michael

 

[dfer]

Hi Guys,

Thanks for the replys, Im a neve virgin.....   so im only getting my head around all the different neve cards and so on.   

and yes wanting 70db would be a bit of an overkill come to think of it......  and i could always add on another 283nv (as Svart kindly mentioned) if i actually needed it in the future.



But it would be nice to have the original 1290 schematic for reference if anyones got it, could you please share it to the community.



Thanks,


Dfer

 

[Svart]

But it would be nice to have the original 1290 schematic for reference if anyones got it, could you please share it to the community

Oh trust me, I'm sure if anyone had it they'd have shared it by now.. 

 

[BR]

Hi Dfer,

Sorry about the shameless plug, but I have a bunch of BA283 cards available for sale.  They are original layout.
Let me know if you are interested.
take care
Gil

 

[dfer]

Regarding the original 1290 schematics...........

We know you have it! Just hand them over and we won't press charges!!  ;D  ;D

 

[peter purpose]

Check your e-mail ya plonker.

 

[dfer]

I knew you had it Peter! You could'nt sit on that schematic forever!


Thanks Peter Ya Legend!

 

[peter purpose]

Go mbíodh biseach ort gan mhoill.

 

[Svart]

now post it!