BA283 Pimping

[Skylar]

Just pimping my latest project.

I had some BA283 boards made which are nearly identical to the originals except

A) no card-edge fingers; 0.200" header instead

B) removed unused pins


I've got an SCA chassis with two channels of N72.
I'm going to add two additional channels based on these boards
+ Marinair 31267 inputs / Sowter 8751 outputs
+ 2pole/11way switch ala JLM:









           






More pics as progress continues.

 

[simonsez]

For sale? ???

 

[solderspongebob]

no card-edge fingers; 0.200" header instead

Ideal for a neat row of screw terminal blocks. Fantastic idea!

 

[desol]

Your gonna like the sound of em...i'm sure of that.  ;D

 

[SIXTYNINER]

SKYLAR :
possible buy some pcb or kit?

6T9R

 

[Skylar]

Your gonna like the sound of em...i'm sure of that.  ;D

Yes, I'm sure you are correct!

For sale? ???

SKYLAR :
possible buy some pcb or kit?

6T9R

I could make these available, but I would probably want to do some things differently on the second run (only had 4 made).

Now that I've tried the screw terminal thing with these, I'm thinking there could be a better solution still using card-edge.


Also, there are some off-board components that are kind of a pain to deal with in this arrangement...
mainly the power rail bypass caps.


Maybe I will make a separate board with PCB-mount card-edge connectors.
Then I'll go back to the card-edge style BA283.

Hmmmmm, thinking about this....




But, I'll share the gerbers for this board if anyone wants.

 

[kambo]

gerbers for BA283
yupppieeee

 

[Skylar]

Okay, I'm sending the gerbers to the GroupDIY gmail.

Note that I'm providing this as-is with no guarantees.
Use at your own risk.

You'll need a good understanding of Neve circuits to do anything with this at all.

 

[kambo]

that would be nice, wsith silk sreen, double side etc.. but, it would take ages to organize  something like that.
i will get on with the home_made version  ;D

 

[Nele]

It would be nice if someone could front a cheap fab and sell these on the BM, without getting all profit hungry

How about Gustav?

 

[kambo]

actually martin is doing sort of....
http://www.groupdiy.com/index.php?topic=22828.msg415591#msg415591

that what i needed

 

[desol]

actually martin is doing sort of....
http://www.groupdiy.com/index.php?topic=22828.msg415591#msg415591

that what i needed

Exactly. Martin's board is a 3 stage 12*0. What more do y'all want??
Kudos to Skylar for doing his own.
Cheers.

 

[Biasrocks]

Exactly. Martin's board is a 3 stage 12*0. What more do y'all want??
Kudos to Skylar for doing his own.
Cheers.

Not too mention the fact that the 1290 mic pre requires a B189 and a B183AM board.

Mark

 

[gemini]

Resurecting old thread

I just print the gerber file from groupdiy email and here's what I got. If anyone interested PM or email me. I made 20 of this and would love to share cost with you guys..

Rgds
Imam

 

[gemini]

just this PCB from skylar files..no 3rd Stage at the moment..sent you pm btw..

 

[Skylar]

After building these, I found that the two smaller holes for the 2N3055 are a tight fit.

I was able to barely force the transistor into the board on the first one I built.
On the second one, I drilled the holes a little larger before populating the board.

So, I recommend enlarging these two holes slightly for ease-of-construction.

 

[mylesgm]

Hey, Whats the overall gain on these boards with the correct input and output transformers?
M

 

[kato]

50dB

 

[alexc]

Depends on the value of feedback and gain setting resistors.

50dB is a common overall gain value but can be setup for more or less.

PS - I have a pair of 'HotRod' pcbs (JLM circuit) for easily adding the supporting circuitry to a BA283 to create a full '1272' style preamp. 

You can PM me if interested - I'm not going to get around to building.

Cheers