Balancing card (2x unbal-to-bal & 2x bal-to-unbal) R vs G graph added

[audiox]

Audiox, can you please indicate the output caps value?

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/filcap.html

 

[Kimster]

Hi!
I know its an old thread, but I wonder if anyone has gerber files for this projekt?

/Kimster

 

[taczowbes]

Hi,

Would OP happen to remember with what power supply they achieved the measurements at the top of this thread?

Wondering if anyone has built this and has thoughts about what sort of power supply I should seek out.

Thanks.

 

[Dimon]

Вот кастомная версия этой печатной платы с восемью каналами от небалансного до балансного.
Надеюсь, Audiox, ты не против, что я настроил твою печатную плату!

https://www.dropbox.com/s/wjrwomyzt69f73i/300dpi8chbalancingcard.tif

Hello, the link is dead, can you please update it?

 

[chrispbass]

I made an un-balanced to balanced make-up gain stage for a project today, using a bit of vero board and components out of the parts bin based on the schematics from Audiox. Thank you Audiox.

If useful to anyone, here are the original documents re-uploaded.

One thing I did notice was with regards to the gain calculations shown in the bal_card_block_diagram doc. I think it should be 20K as the denominator instead of 10K for the un-balanced to balanced (channel 3/4). Perhaps someone can confirm that please based on the schematic doc.

 

[MidnightArrakis]

I made an un-balanced to balanced make-up gain stage for a project today, using a bit of vero board and components out of the parts bin based on the schematics from Audiox. Thank you Audiox.

If useful to anyone, here are the original documents re-uploaded.

One thing I did notice was with regards to the gain calculations shown in the bal_card_block_diagram doc. I think it should be 20K as the denominator instead of 10K for the un-balanced to balanced (channel 3/4). Perhaps someone can confirm that please based on the schematic doc.

[I think it should be 20K as the denominator instead of 10K for the un-balanced to balanced (channel 3/4)] -- See below and the response back in Post #34:



>> Chrispbass: THANKS!!! for the reuploading of these files. All of the earlier links are now dead and don't work -- ERROR 404!!!

>> Watch this space for further developments....."Please Stand By.....".....

/

 

[chrispbass]

[I think it should be 20K as the denominator instead of 10K for the un-balanced to balanced (channel 3/4)] -- See below and the response back in Post #34:

View attachment 139321

>> Chrispbass: THANKS!!! for the reuploading of these files. All of the earlier links are now dead and don't work -- ERROR 404!!!

>> Watch this space for further developments....."Please Stand By.....".....

/

Thank you Midnight….missed or glanced by those posts! Brains a bit flabby at the mo!

It’s a very useful circuit with minimal parts count, and although I didn’t have exacting values of components to hand, it’s working well with a few cascaded resistors etc.

I may do a pcb layout at some point and share the gerbers as It’s a very useful utility type circuit, unless you fancy doing it? Perhaps a stereo pair of each way may be the way to go.

Cheers

Chris

 

[MidnightArrakis]

Thank you Midnight….missed or glanced by those posts! Brains a bit flabby at the mo!

It’s a very useful circuit with minimal parts count, and although I didn’t have exacting values of components to hand, it’s working well with a few cascaded resistors etc.

I may do a pcb layout at some point and share the gerbers as It’s a very useful utility type circuit, unless you fancy doing it? Perhaps a stereo pair of each way may be the way to go.

Cheers

Chris

[I may do a pcb layout at some point and share the gerbers] -- Should you happen to do your PCB-layout using either ALTIUM Designer, CADENCE/OrCAD or KiCAD.....PM me your PCB-layout design first and I will review it for you. Otherwise, PM me all of your GERBER and the N/C Drill data files and I will import and run them through a "GERBER & N/C Drill" data file analysis program that I have which will check your GERBER and N/C Drill data files for -- manufacturability -- issues >> BEFORE << you spend the money to have any PCBs made. Just sayin'.....

While practically everyone else here on this forum looks to use -- FREE -- CAD-design programs, I go ahead and spend several thousands of dollars on the CAD-design programs that I use. I'm -- NOT -- bragging or anything. It's just that my background and experience with doing PCB-designs is just a bit different than most of the other members on this forum.....much to the disgust of many on here.

/