[ProAudio] Western Electric 111C transformers

[Bill Whitlock]

The nearest equivalent Jensen is the JT-11-11SSP-7MPCData sheet at https://www.jensen-transformers.com/wp-content/uploads/2014/08/jt-11ssp-7mpc.pdf
As you may know, level handling is one of those slippery specs.  The number depends on many things, in order of relative importance:FREQUENCY, Distortion criteria (at 3% or 1% or ?, and source impedance.  Be sure you're comparing apples to apples.
Actually, during my days there, we made the -8M version of the -6M part ... it had a bigger core. The PC mount version ended up with a core size between the two.
Bill Whitlock(Jensen owner/chief engineer 1989-2014)


-----Original Message-----
From: Tim Požar via ProAudio <proaudio at bach.pgm.com>
To: bobkatz at digido.com; proaudio at bach.pgm.com
Sent: Sat, Jan 29, 2022 2:16 pm
Subject: Re: [ProAudio] Western Electric 111C transformers

What "color" are you expecting out of these guys?  They are basically 
just nice transparent transformers. We use them all over the place for 
shipping audio at events over long copper pairs.

One nice thing is you can easily do +24 dBu or more into them w/o them 
going into saturation.  As there is less iron in the Jensen 
transformers, it would be interesting to see where they top out compared 
to the 111c

https://www.jensen-transformers.com/wp-content/uploads/2014/08/jt-11-hfmpc.pdf

On 1/29/22 1:16 PM, Bob Katz via ProAudio wrote:
> Hola, Guys. I’ve got a pair of these sitting around doing nothing. I’m sure their effect will be subtle but it might be nice to package them into a passive box for their color in a mastering session.
> 
> To vary their color would you have any suggestions on switchable buildout or termination resistors or zoebel networks I might want to add to the box, in addition to hard wire bypass?
> 
> Appreciate any suggestions. Thanks
> 
> 
> Bob
> 
> -- 
> 
> If you want good sound on your album, come to Bob Katz 407-831-0233 
> DIGITAL DOMAIN MASTERING STUDIO Author: *Mastering Audio* Digital Domain 
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