[sdiy] [OT] first steps with audio transformers

[Michael Zacherl.]

ah, thanks Harry - "Jensen" rings bells, I think it was mentioned here quite some while ago.  ;-)

 Michael.  (off to read)

On Nov24, 2010, at 18:33 , Harry Bissell wrote:

> You can connect windings in series if you like... (or parallel but you probably don't want to do that...)
> 
> Low DC resistance should not be an issue, you need to keep DC out of a transformer anyway.
> 
> Probably you want to have some opamp buffer to drive the transformer. You'll need to keep signal
> levels pretty low to avoid saturation at low frequencies (approaching DC, which is bad...).  That's
> why the distortion chart takes such a steep curve up at the low end...
> 
> Try http://www.jensen-transformers.com/ for some good reading
> 
> H^) harry
> 
> 
> ----- Original Message -----
> From: Michael Zacherl. <sdiy-mz01 at blauwurf.info>
> To: sdiy DIY <synth-diy at dropmix.xs4all.nl>
> Sent: Wed, 24 Nov 2010 07:44:25 -0500 (EST)
> Subject: [sdiy] [OT] first steps with audio transformers
> 
> Hello,
> 
>   I'm about to do my first steps with audio transformers and the more I read the more I  become uncertain about many points. :-(
> 
> First application will be an analogue input/output and monitoring stage for some laptops (different brands) in order to interface with a synth and/or mixer.
> 
> Admittedly I'm not sure about impedance, dc-resistance and if it's feasible to connect windings.
> 
> Looking at a data sheet overview like this 
> http://docs-europe.origin.electrocomponents.com/webdocs/008d/0900766b8008d64a.pdf
> 
> I find this one pretty attractive (also moneywise)
> http://docs-europe.electrocomponents.com/webdocs/00bb/0900766b800bbc2c.pdf
> 
> How to handle this low dc-resistance?
> Could I connect the primary windings?
> Input impedance appears to be pretty low as well, bad?
> 
> Thanks a lot, Michael. 



--
keep your ears open: http://blauwurf.at
http://facebook.com/noiseconformist