Running 7 different voltages in one box

[helterbelter]

ehhh, okay.

a seperate board for the diode drops ? Not necessarily. You can solder these in the wiring to the rear connectors of the Xrack modules, and use heatshrinktube for isolation. Just like the 10k resistor to the master-reset pins on the 5k modules.

The TREX is a very handy tool, but is of no use here, because it can only do positive voltages, and it's overkill to use this for the +5V only.

few questions :
-how many modules 5k, and Xlogic ?
- external PSU or internal ?

regarding 1 or more transformers : in case you're doing an internal psu, I understand that you prefer to use not more than 1 transformer. However, if you're building an external PSU, I think using multiple transformers would be a benefit, because you can match the transformers to the voltages that you need. Bringing down 24v to 5v is an awful lot.

Another benefit of using a seperate supply for the logic line, is that when the audio-18v fails, the logic doesn't get 24v.


As response to the +5v of the Xrack psu :
Not likely that this much current is needed for the Xrack audio cassettes in a Mynx. I don't have experience with the Xrack stuff, but most 5000 cassettes use +/- 20mA for the logic in standalone use.
However, take a look at the TR part of the 8slot X-rack. When a total recall of all switches of 8 cassettes is performed, this will draw a lot of current in a short time. Even though it's just for 1 second, the PSu must be able to deliver.

So, since you'll not be adding TR, I would be very surprised if you need this much current. But again, I have no experience with X-rack stuff.

 

[atticmike]

ehhh, okay.

a seperate board for the diode drops ? Not necessarily. You can solder these in the wiring to the rear connectors of the Xrack modules, and use heatshrinktube for isolation. Just like the 10k resistor to the master-reset pins on the 5k modules.

The TREX is a very handy tool, but is of no use here, because it can only do positive voltages, and it's overkill to use this for the +5V only.

few questions :
-how many modules 5k, and Xlogic ?
- external PSU or internal ?

regarding 1 or more transformers : in case you're doing an internal psu, I understand that you prefer to use not more than 1 transformer. However, if you're building an external PSU, I think using multiple transformers would be a benefit, because you can match the transformers to the voltages that you need. Bringing down 24v to 5v is an awful lot.

Another benefit of using a seperate supply for the logic line, is that when the audio-18v fails, the logic doesn't get 24v.


As response to the +5v of the Xrack psu :
Not likely that this much current is needed for the Xrack audio cassettes in a Mynx. I don't have experience with the Xrack stuff, but most 5000 cassettes use +/- 20mA for the logic in standalone use.
However, take a look at the TR part of the 8slot X-rack. When a total recall of all switches of 8 cassettes is performed, this will draw a lot of current in a short time. Even though it's just for 1 second, the PSu must be able to deliver.

So, since you'll not be adding TR, I would be very surprised if you need this much current. But again, I have no experience with X-rack stuff.

I thought of snatching a transformer with 2 x 15 V secondary voltage along with an additional coil of 5V but I have really a hard time finding a dealer offering such "exotic" transformers at all.

Well, I intended to run that box with a single transformer inside the box but now that all options are exhausted and it's so hard to get the single transformer in box deal, I might consider giving the two horses in one box a chance.

About the modules, it'd be 2 x 5000 modules (input & compressor module) as well as 1 x X-rack EQ (basically a custom channelstrip)

Also, I asked Jim at SSL about the 2.5 A and their apparent superfluousness and he answered: "Typical SSL over-engineering "

 

[helterbelter]

Oh, only 3 modules.....

Then I'd say :

Then a JLM 5 rail psu is perfect. Use 1 torroid with a dual 18v secondary.
+VE1 : +17.5v
+VE2 : +5v
-VE2 : -17.5v
-VE2 : -24v
Leave out the doubler rail, unless you want to add phantompower later on. (you say channelstrip, so.....).
Use 4 diodes 1n4007 (or equivalent)  for the X-eq.  2 on each audio voltage rail.

Again, it'd be best to wire the regulators off-board so you can use a larger distance between the regulators on the heatsink. Or use seperate heatsinks.