Tycobrahe Octavia Transformer 42tm022 Possible Alternative? (aus)

[chromesphere]

Hi all!

Considering putting one of these together for a future project.  The 42tm022 is a difficult beast to find in Australia so im trying to find an alterative, which i think i may have found, although must warn, i am a transformer noob. 

This transformer has a 3k : 3k (1:1) ratio.  Im assuming the center tap on the secondary is halfway, which would make the transformer operate: 3k : 1.5k (2:1).  From what i've read, this is the region you want the transformer to be in with the Octavia.  Am i correct?

Here is the transformer:

http://www.jaycar.com.au/productView.asp?ID=MM2534&keywords=coupling&form=KEYWORD

And the Specs:

http://www.jaycar.com.au/products_uploaded/MM2534.pdf


Any help greatly appreciated!!

Paul

[PRR]

That transformer will probably work.

Yes, it IS CT; from the intended application (push-pull driver) and by the remarkably detailed specs (two 720 turn windings).

> 3k : 1.5k (2:1)

FWIW: half of a CT winding would be 750 ohms. Half the voltage, double the current. 1/4 the impedance.

But there's tons of slack in this design: source is under 1.2K, load is nearly 500K, the actual impedances are not critical.

What *may* matter: the original is specified as 500:1K5CT, a 1:1.7 voltage step-up across and 0.8 primary to half-secondary. Your part is 3K:3KCT, unity across (and half to each side. So you want 0.8 and you have 0.5. I think this is well within the range of the driver-amp and its gain trim.

[chromesphere]

Hey PBR! 

Thanks for the detailed explanation! 

Its a little technically above my head but i think i get the basic idea.  I think its worth a shot.  I'll post my results in the future when i undertake the project.

Thanks again!
Paul