will this work?

[p.larner]

I ordered 2 transfos from aliexpress 230v pri sec 12-0-12v,ie 12 volt center tapped secondarys ,they sent ones with 12v secondaries with no center tap,so its a nogo sending them back,so can i wire there both primaries in series,then link the secondaries,using the link as a center tap,for +12/-12v,hope it makes sense,its only a load for swithching relays in a psu kit.

[moffy]

Wouldn't you want the primaries in parallel otherwise if in series the secondaries will become 6V RMS windings? If you wire them with the primaries in parallel and link one terminal of a 12V RMS winding to one terminal of the other, phasing might be important, just make sure you have 24V RMS across both windings when they are connected.

[Andy Chee]

It’s possible to use a voltage doubler configuration to obtain +/-12V dual rails from a single 12VAC winding.

But if you’re only powering relays, that normally doesn’t require dual rail supply.

Can you post a schematic?

[Gyro]

I ordered 2 transfos from aliexpress 230v pri sec 12-0-12v,ie 12 volt center tapped secondarys ,they sent ones with 12v secondaries with no center tap,so its a nogo sending them back,so can i wire there both primaries in series,then link the secondaries,using the link as a center tap,for +12/-12v,hope it makes sense,its only a load for swithching relays in a psu kit.

You description is not at all clear. If you order 12-0-12V secondaries, then you shouldn't expect to receive center tapped 12V ones (6-0-6V).

Please post a clear diagram of what you want, labeling all voltages, together with clear photos of the transformer, including labels.

[tooki]

I ordered 2 transfos from aliexpress 230v pri sec 12-0-12v,ie 12 volt center tapped secondarys

12-0-12 is a center-tapped 24V transformer.

[p.larner]

The transformer is the aux one in the schematic attatched,the orig is slightly wrong but it makes the point,basicaly i have a bunch of 12v secondary transfos that i need to use for the aux transfo in the psy schematic.,sending these back to china is a no brainer!.

[DavidAlfa]

Connecting the primaries in series will lead to 6V+6V instead your intended 12+12.
Primaries must go in parallel, secondaries in series, emulating the center tap.
Just like this: