jsteiger

Re: [BUILD]CAPI 2-ACA-Bo~Official Support Thread
« Reply #460 on: November 14, 2017, 11:38:47 PM »
What fader is it and how do you have it wired?
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Re: [BUILD]CAPI 2-ACA-Bo~Official Support Thread
« Reply #461 on: November 15, 2017, 12:44:06 AM »
I'll have to double check after work, fairly certain the 200b is 10k faders all round. 22k bus resistors.
And as for wiring I replicated it from pictures from the below 200b/CAPI thread.

https://groupdiy.com/index.php?topic=54847.0

jsteiger

Re: [BUILD]CAPI 2-ACA-Bo~Official Support Thread
« Reply #462 on: November 15, 2017, 09:15:03 AM »
I'll have to double check after work, fairly certain the 200b is 10k faders all round. 22k bus resistors.
And as for wiring I replicated it from pictures from the below 200b/CAPI thread.

https://groupdiy.com/index.php?topic=54847.0
Looks like he was having the same issue...
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CAPI is not affiliated with, endorsed by, or sponsored by API.

punk

Re: [BUILD]CAPI 2-ACA-Bo~Official Support Thread
« Reply #463 on: August 27, 2018, 09:14:34 PM »
installed, finally, into a soundworkshop SW34. very easy mod and sounds great.
thanks Jeff!!
byron

Re: [BUILD]CAPI 2-ACA-Bo~Official Support Thread
« Reply #464 on: September 21, 2018, 02:50:38 PM »
Hello,
I want to upgrade my D&R 8000's master section with the ACA Booster and stumbled upon two questions.
The master bus on the 8000 is fed through 12k resistors (see first picture). Can I put a 35k resitor in front of the ACA input to get to 47k ? Or how do I recalculate the feedback resistors and caps on the ACA?

And can you give me some tips where I should bypass the original master section? My first thought was to go from the master bus and return before the insert point (see second picture). But then I would loose the monitor bus. And I would like to keep the original insert point. Where would you set the bypass points?

thank you
Arne
« Last Edit: September 21, 2018, 06:19:03 PM by a_wachtmann »

boji

Re: [BUILD]CAPI 2-ACA-Bo~Official Support Thread
« Reply #465 on: January 24, 2019, 04:16:26 PM »
Would someone mind explaining how values are decided on cap bypass resistors that go to primaries on the tx's in the CAPI aca bo? 

for the 2623 side, it is 100r.  For the boost side, the 2503 has a 47r at 1%.  I assume these values are critical?

I ask because in this case, I only need the first stage on the ACA side (28k nfb) for outputs,  but I have paired it to a 2503 instead of a 2623.
Would it be ok to use the 100r on the 2503?

Thanks in advance for any help!
-Boji
« Last Edit: January 24, 2019, 04:23:07 PM by boji »

Re: [BUILD]CAPI 2-ACA-Bo~Official Support Thread
« Reply #466 on: February 08, 2019, 06:58:30 PM »
Hey Jeff and 2-ACA users,

I am building a 16 channel summing mixer.  Each channel inputs to Jeff's 2S-LA cards (http://capi-gear.com/catalog/product_info.php?cPath=22_191&products_id=438),  P&G 10k faders, and Pan Pots (or switches) feeding the 2-ACA.

I am hoping to have VU's on the master bus using this buffer: https://www.jlmaudio.com/shop/vu-buffer-kit.html?display_tax_prices=1

I'd like to use Jeff's Floor Box Power Supply:  http://capi-gear.com/catalog/product_info.php?cPath=176_178&products_id=358


Does anyone have a simple schematic or wiring diagram I can follow to achieve this?

Thanks for any help y'all can give!

-Josh



« Last Edit: February 08, 2019, 07:25:09 PM by Math5461 »

Potato Cakes

Re: [BUILD]CAPI 2-ACA-Bo~Official Support Thread
« Reply #467 on: March 26, 2019, 06:54:05 PM »
Just wanted to double check one thing before I install this in a TAC Scorpion. All of the shield and DC ground connections are all tied together on the ACA-Bo except at the ACA input where those shield connections are isolated and go to the ACA DOA. Since these connections will be all inside the console and no separate shield or (-) connection on the master channel, do I just tie these connections to the 0V (ground) connection as well?

Thanks!

Paul

EDIT: The answer is yes.
« Last Edit: March 27, 2019, 12:10:59 AM by Potato Cakes »

MrBlomski

Re: [BUILD]CAPI 2-ACA-Bo~Official Support Thread
« Reply #468 on: May 06, 2019, 03:36:15 PM »
I want to use the 2503-L on the 2 ACA.

Do I have to follow this wiring, according of the cape datasheet?

To use the 2503-L in place of the EA2503, follow this table:
2503-L        EA2503
Red               Gray
Pink              Blue
Yellow         Yellow
Orange       Red
Black            Violet
Gray             Green
White          Orange
Violet           Brown
 
Cause I hear a tiny bid of audio after the booster side.
thanks.

TubeMonkey

Re: [BUILD]CAPI 2-ACA-Bo~Official Support Thread
« Reply #469 on: June 04, 2019, 02:36:33 PM »
Hey Jeff and 2-ACA users,

I am building a 16 channel summing mixer.  Each channel inputs to Jeff's 2S-LA cards (http://capi-gear.com/catalog/product_info.php?cPath=22_191&products_id=438),  P&G 10k faders, and Pan Pots (or switches) feeding the 2-ACA.

I am hoping to have VU's on the master bus using this buffer: https://www.jlmaudio.com/shop/vu-buffer-kit.html?display_tax_prices=1

I'd like to use Jeff's Floor Box Power Supply:  http://capi-gear.com/catalog/product_info.php?cPath=176_178&products_id=358


Does anyone have a simple schematic or wiring diagram I can follow to achieve this?

Thanks for any help y'all can give!

-Josh

If you use the 2ACA board instead of the 2S-LA you could rewire the output configuration to give you 1:1(*3) Then use one of the taps to feed the output, and one to feed the VU meter. You could probably get away with making back up the 6db loss from switching from 1:2 by adjusting the value of the feedback resistor.   I need to check in my desk but i'm pretty sure the vintage API's all used this exact configuration to drive the meters without causing signal-path distortion from running it in parallel.

This configuration would also give you an insert/600 fader between the summing stage and the line amp stage.


 

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