Folks:
I am planning on building a dual mono F6 amplifier using two 200VA toroids. In order to save space in the chassis, I'd like to mount the toroids on either side of the long end of an "L" shaped aluminum bracket using a single bolt. Can anyone confirm for me that this won't cause a problem?
Thank you,
Scott
I am planning on building a dual mono F6 amplifier using two 200VA toroids. In order to save space in the chassis, I'd like to mount the toroids on either side of the long end of an "L" shaped aluminum bracket using a single bolt. Can anyone confirm for me that this won't cause a problem?
Thank you,
Scott
The whole idea is ok. Just be careful not to give a large stress onto a wires of a transformer. It would be good to distribute a load to a maximum possible area.
SRMcGee,
You can stack one toroid on top of the other too.
What power supply board are you planning to use? The new PSU board from Prasi is pretty compact.
What chassis do you have in mind? If you are not constrained in any way to using a chassis with 300mm depth, I would recommend a 350-400 mm deep chassis. Makes placement of items much easier. 🙂
You can stack one toroid on top of the other too.
What power supply board are you planning to use? The new PSU board from Prasi is pretty compact.
What chassis do you have in mind? If you are not constrained in any way to using a chassis with 300mm depth, I would recommend a 350-400 mm deep chassis. Makes placement of items much easier. 🙂
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Why not thread the toroids on a wood dowel to spread the load? Otherwise, what's taking the weight? The rims of the transformers?
It doesn't have to be myrtle wood.
It doesn't have to be myrtle wood.
The only thing to worry about is creating a shorted turn, so long as you don't do that you should be OK - and of course keep away from input signals like for any magnetic component that might induce voltages at the sensitive end of the amp.
Nice build Marra. As before make sure no shorted turns are created, so make sure the toroids/mounting hardware cannot rest on the bottom of the chassis. My concern would be if the case took a knock, or was just moved a lot, make sure they cannot move too far "down" the L bracket to make a shorted turn.
@ohdsp
That's why I was suggesting a dowel. To hold the toroids in place giving clearance to the windings, spread the weight a bit and avoid the things moving about in a storm.
That's why I was suggesting a dowel. To hold the toroids in place giving clearance to the windings, spread the weight a bit and avoid the things moving about in a storm.
Some toroid's I've used have a lot of play with the mounting hardware ("top dish") provided, unless the dowel filled the hole in the middle they could still move....
Filling the hole was the essential idea.
Wrapping the dowel with a bit of dense foam -- per the usual hardware -- might be appropriate too.
Wrapping the dowel with a bit of dense foam -- per the usual hardware -- might be appropriate too.
Ahhh, or just stick the foam on the bottom side of the transformer, or the bottom of the case, just in case...
I've purchased a 4U 400mm Dissipante chassis from Modushop. I didn't get the UMS holes, so I'll have to drill and tap those myself. I'm now considering placing the two 200VA toroids side by side at the front of the chassis. I have a couple of the old style (v2.0) diyAudio power supply boards in inventory and will likely put them on standoffs above the toroids. That will leave a lot of open space in the middle and rear of the chassis (good breathing room). A Mark Johnson H9KPXG board will provide soft start and switch control.
Nothing's written in stone. The idea of using aluminum brackets to stand the toroids on their sides is great and I'll see if it looks promising in my build.
Thanks to everyone for the feedback. This has been great -- lots of ideas to ponder.
Regards.
Nothing's written in stone. The idea of using aluminum brackets to stand the toroids on their sides is great and I'll see if it looks promising in my build.
Thanks to everyone for the feedback. This has been great -- lots of ideas to ponder.
Regards.
This company seems to make interesting transformers: "O" core and with potted centres including embedded nuts that might lend themselves to various mounting arrangments.
O core transformer_James transformer-custom toroidal transformer|R core transformer|O core transformer|C core transformer|EI transformer
O core transformer_James transformer-custom toroidal transformer|R core transformer|O core transformer|C core transformer|EI transformer
I’ve used a single bracket to mount two transformers vertically before to save space, but they were smaller.
Embedded nuts make it almost impossible to mount the toroids the way the OP intends to. You may want to drill one transformer's nut thread out.
Best regards!
Best regards!