[BUILD] CAPI Dual VPR & 51x Floor Box PSU~Official Support Thread

[Volume11]

Thanks, that's not a bad idea. I'm pretty sure that they haven't been damaged, yet, and I already ordered the regulators. If I am still having issues after, then I will certainly give that a try.

Thanks

Chad

 

[mulletchuck]

Can we get a hypothetical rack configuration where 22 modules would be powered by one PSU?  if ya could name some specific modules, that'd be appreciated.  I'm trying to see if I actually need both of my PSUs because i only have 3 modules that actually use the 24V rail (51X-F76 x2 & VP312DI w/FET HiZ)

 

[jsteiger]

Measure the current draw of each module that you have and come up with a total that is based on your real situation, not hypotheticals.

 

[mulletchuck]

lol I guess i gotta figure out how to measure current with my multimeter then!

 

[Volume11]

Just want to give you guys an update.. The psu is now fully functional! The 48v regulator was shot as well as the LED. Thanks for the help guys, what a relief.

Chad

 

[kante1603]

Congrats Chad,have fun!

Udo

 

[qmp audio]

lol I guess i gotta figure out how to measure current with my multimeter then!

Would love to see your results Chuck.  I'm about to install new modules bringing me to 14 'vpr' and 6 51x.  Need to measure to see if my 1 power supply can handle both racks.... Which I'm pretty sure it can based on some of the vp26 etc specs I've read.

 

[mulletchuck]

that's what i'm trying to figure out.  the spec for the PSU says 11 16V modules and 11 24V modules.  but almost every 24V module uses both 16V and 24V rails :-/    we really need a PSU that handles 22 modules that use BOTH sets of rails simultaneously.

 

[[silent:arts]]

... but almost every 24V module uses both 16V and 24V rails :-/

more specific - which modules do this?

we really need a PSU that handles 22 modules that use BOTH sets of rails simultaneously.

use two PSUs

 

[okgb]

to put it another way , A friend bought one psu and two 51x racks , but I'm thinking he'll have
more 16 v modules than 24v  ,  that could be a problem ?  if he ends up trying to run more than half
of them for 16v and only a couple of 24 v ?

 

[[silent:arts]]

Gentlemen, what is wrong with the specs?
We all don't know the power your individual modules will consume.
Measure and calculate. 8)

 

[jsteiger]

Measure and calculate. 8)

+1

 

[okgb]

It is a pretty hefty psu xfmr as is , so doubling that may not be reasonable and not sure too many people
would be happy with the cost after that [ for something maybe not fully utilized ] and with a couple resister changes
you can get two sets of 16v rails , I get that .  [ And the sexy red box DOES distract me from my girlfriend ]
Fuses are 1.5 amp per rail , can you remind me and confirm , that is my max draw ?
[ and although that may seem like a simple question that you may respond to by "  look it up yourself "
I appreciate the " official  " and knowledgeable confirmation  , thanks  ]

It is a good reminder for people to take into consideration when planning their racks , and those making
preamps  to include in their specs

 

[tomas1808]

Silentarts and Jsteiger, do you sell the PCB separately? If so, what are the dimensions of the PCB? Thanks!

 

[gar381]

Silentarts and Jsteiger, do you sell the PCB separately? If so, what are the dimensions of the PCB? Thanks!

http://classicapi.com/catalog/product_info.php?cPath=87_112&products_id=165

GARY

 

[jsteiger]

Indeed, thanks Gary. That is Volkers original.

The Floor Box PCB is also available separately.
http://classicapi.com/catalog/product_info.php?cPath=176_177&products_id=351

 

[tomas1808]

Yes, I was looking specifically for the newer version.

Thanks Gary and jsteiger.

EDIT: BTW would it be a good idea to build one of these to power my non-VPR-51X racks? I always wanted to build a single universal PSU for all my projects (or whatever number this PSU is able to power). This way I would save lots of space, avoid transformer related hum problems, and also would save me from building a PSU for every project (the most boring part IMO). Is this a good idea? Will I have some kind problem with grounding or something else I cant think of?. Thankss.

 

[sahib]

Firstly, I still supply the rack type power supply. As I manufacture them in-house I even do variations to meet specific requirements.

In response to Chuck's query. My last batch of 15 rack PSUs were dual type, meaning two sets of power supplies in a single case. This can power up to four 511 racks.

However, one has to know the current consumption as Volker and Jeff pointed out.  If I am remembering correctly the accepted current rating per module was around 125mA though API specifies 160mA. So the average would be 1.5A per rack/per rail and both the rack and floor type PSUs will provide that comfortably.

 

[nolivdacom]

Hello,
I have some weird issues with my 51x PSU when it power two JensAmp-51x and two Phoenix audio DRS1R/500. I already post it in another thread because I thougth it was the pin configuration of phoenix preamp that doesn't match with the 511 lunchbox...

It seems that when I put a fourth preamp in my rack, I lost my +16V because of the 1,5A/250V fast blow fuse.
Here are the test I did:

Test 1:
Slot 1: JensAmp 51x
Slot 2: JensAmp 51x
Slot 3: empty
Slot 4: empty
All is right

Test 2:
Slot 1: JensAmp 51x
Slot 2: JensAmp 51x
Slot 3: DRS1R/500 n°1
Slot 4: empty
All is right

Test 3:
Slot 1: JensAmp 51x
Slot 2: JensAmp 51x
Slot 3: empty
Slot 4: DRS1R/500 n°1
All is right

Test 4 & 5
Same things but with DRS1R/500 n°2 instead of n°1
All is right

Test 6:
Slot 1: JensAmp 51x
Slot 2: JensAmp 51x
Slot 3: DRS1R/500 n°1
Slot 4: DRS1R/500 n°2
I lost +16V and the +16V 1,5A/250V fast blow fuse is DEAD...

Here are somes advices thanks to gemini86!

I would bet that there are some large filtering caps on all the board that will suck up a lot of current until fully charged. So, use a slow blow, which will withstand the inrush current for a few seconds before blowing.

Can I try to fix this with a 1,5A/250V SLOW blow fuse without damage preamps or PSU?
Do you think this is an other problem?

Phoenix audio DRS1R/500:
http://www.phoenixaudio.net/products/drs-1r/

JensAmp 51x:
http://www.groupdiy.com/index.php?topic=45341.0

Topic: Phoenix Audio DRS1R/500 and 51xAudio lunchbox:
http://www.groupdiy.com/index.php?topic=50807.0

 

[[silent:arts]]

There is one test missing:
2 x DRS1R/500 without any Jensamps

since I know the Jensamp doesn't touch any 16V rails results will be the same ...