Design Study: GDIY502 Rack

[[silent:arts]]

Frank [www.frontpanels.de] and me are playing with ideas for a 1U, 2 Slot GDIY51X Rack, I call it GDIY502  8)
It was a lot of fun doing some PCBs for his great new standard Rack System.

The small (but beefy) PSU is standard, based on LM317 / LM337 for +/- 16 and 24V, and a voltage doubler and TL783 (or LM317) for Phantom Power. You can leave out the parts for 24V if you want VPR only, or 16V if you only need 24V, etc.

However, it needs at least 22V AC - and here I'm stuck a little bit.
While I'm not aware of any module drawing the 110mA on EACH rail I would like to have this, resulting in a 25VA transformer.
Hard to find fitting in a 1U case.
For sure I can always have one done by Mr. Rondo Müller, however, an off the shelf part for this would be more comfortable.

While hard to find too, would a 24V AC Wallwart be an option?
Any ideas or suggestions?

Some pics of the prototype finished yesterday, using a way oversized PSU transformer we use in the Floor Box PSU for 11 Slots (and more).

 

[AudioGimmer]

Nice work!

 

[pvision]

How about this?  35.8 mm tall + pins
http://uk.farnell.com/block/fl30-24/transformer-30va-2-x-24v/dp/1131525

Nick Froome

 

[Zander]

I've fitted these in a 1u enclosure from Frank. With a bracket he made. http://catalog.triadmagnetics.com/item/power-transformers/toroidal-mount-world-series-power-transformers/vpt48-520 & http://www.mouser.be/ProductDetail/Triad-Magnetics/VPT48-520/?qs=sGAEpiMZZMvwUzoUXIIvyTw34uqMHR%252but33G0eT%252b6y4%3d

 

[dmp]

Antek has 25v / 25VA that fit in 1U, but you'd need multiple transformers to get the 48v, 24v, and 16v.

http://www.antekinc.com/an-0225-25va-25v-transformer/?page_context=category&faceted_search=0

 

[[silent:arts]]

Thanks guys, the Antek and Triad are looking promising.
In this PSU 2 x 25V are enough for all voltages, no need for separate 48V / 16V etc windings.

I'm scared with the Block or other PCB mount transformers.
35,8 + pins, the PCB should have enough air to the bottom for not touching the pins, I'm afraid it is far too dangerous in DIY world.

 

[Axelerator]

transformer hint :
i got a bunch of r-core transformers for all my planned projects cheap in hongkong. 5 mains transformers did cost me 120 euros including mail. they are well made and measuring very good. and they are small in height .
and of course inducing less hum !

 

[andre tchmil]

transformer hint :
i got a bunch of r-core transformers for all my planned projects cheap in hongkong. 5 mains transformers did cost me 120 euros including mail. they are well made and measuring very good. and they are small in height .
and of course inducing less hum !

where ?