Audio transformer suggestions?

[dgatwood]

If I were planning to replace the transformer in my Nady RSM-2 with one with less HF roll-off, what transformer would folks suggest? I particularly liked the Shinybox Lundahl samples, so I'm looking for something with that sort of sound, but which Lundahl transformer? LL2911, maybe?

Ideas?

[BigRay]

the guy at www.oade.com (Doug)

is a transformer expert. Call him up and pick his brain..he will point you in the right direction.

[qbert1]

I can't say for certain, but I believe that's the same transformer Shiny-box is using in their mics. I put one in a Oktava ML52-2, it was a noticeable improvement.

[punkin]

See entry #13 http://www.3daudioinc.com/3db/showthread.php?p=4407

It does seem to be an LL2911. Pick them up for $60 here http://www.kandkaudio.com/transformers.html.

You can also get them here; http://hometown.aol.com/kevinc927/my.../business.html

I have done this mod...it's a good project. It opened up my cheapie ribbon...especially on the upper end.

[dgatwood]

Originally Posted by punkin

See entry #13 http://www.3daudioinc.com/3db/showthread.php?p=4407

It does seem to be an LL2911. Pick them up for $60 here http://www.kandkaudio.com/transformers.html.

You can also get them here; http://hometown.aol.com/kevinc927/my.../business.html

I have done this mod...it's a good project. It opened up my cheapie ribbon...especially on the upper end.

I just got two of them in the mail today. I'm going to do this mod in the next couple of weeks. I'm still deciding how to wire it....

The only wiring configuration they show (which is oddly described as a "connection alternative") has all of the primary pairs wired in parallel between the two signal lines from the ribbon, which if memory serves, should result in higher power (W) on the output (1+1+1+1:37 configuration). The wiring scheme that I'd sort of pictured in my head was wiring each of the primaries in series for higher voltage output (1:148 configuration).

12 dB of extra gain or higher wattage? Any thoughts?

[dgatwood]

Nobody????

[mshilarious]

Originally Posted by dgatwood

Nobody????

Wow, that is really more of a Lab question, but to my knowledge, increasing the output of a ribbon via a transformer has a detrimental effect on frequency response It's somewhat analogous to using stronger magnets, I think.

Where is Marik when we need him

[nwsoundman]

Originally Posted by dgatwood

I just got two of them in the mail today. I'm going to do this mod in the next couple of weeks. I'm still deciding how to wire it....

The only wiring configuration they show (which is oddly described as a "connection alternative") has all of the primary pairs wired in parallel between the two signal lines from the ribbon, which if memory serves, should result in higher power (W) on the output (1+1+1+1:37 configuration). The wiring scheme that I'd sort of pictured in my head was wiring each of the primaries in series for higher voltage output (1:148 configuration).

12 dB of extra gain or higher wattage? Any thoughts?

Paralleling the primary windings will give the bigger ratio. Putting the windings in series will make for a smaller ratio.

Can you post the data sheet?

[dgatwood]

Originally Posted by nwsoundman

Paralleling the primary windings will give the bigger ratio. Putting the windings in series will make for a smaller ratio.

Oh, yeah. You're right. The primary should have fewer windings.... Next on homerec... top 10 signs that David is sleep-posting.

Originally Posted by nwsoundman

Can you post the data sheet?

http://www.lundahl.se/pdfs/datash/2911.pdf

[sweetnubs]

seems like you're trying to put a precision racing engine into a a Yugo.