150/600 Isolation Transformers- any uses for hifi projects?

VictoriaGuy · 7th January 2009, 07:08 PM

I've got a bunch of v. good quality line isolation transformers, and need some ideas of how to use them in audio projects. (Components driving choice of project...)

Transformers (Hammond 850G) have 150/600 primary, 150/600 secondary. 20Hz-20kHz +- 0.5dB.

My audio setup now is CD player into tube amp (Pointz 6V6 MM), but I plan to build up some chipamps and perhaps a preamp like the Pass B1 at some point.

Can these be used in interstage or input locations, in place of a capacitor? All the stuff I've found on transformer coupling seems to have high impedance secondaries.

Or should I just try to sell these to somebody who's making a mic/recording setup?

Thanks
John

Sjef · 11th January 2009, 08:19 PM

One thing you can do with them is to drive the preamp output into them, then put another pair on the power amp input and terminate it with 600Ohms and then you will have a perfect transmissionline between your pre and poweramp wich can be over 100 meters long if you want. Welcome to the world of Pro-Audio

7th January 2009, 07:08 PM	#1
VictoriaGuy diyAudio Member Join Date: Dec 2008 Location: Victoria, BC	150/600 Isolation Transformers- any uses for hifi projects? I've got a bunch of v. good quality line isolation transformers, and need some ideas of how to use them in audio projects. (Components driving choice of project...) Transformers (Hammond 850G) have 150/600 primary, 150/600 secondary. 20Hz-20kHz +- 0.5dB. My audio setup now is CD player into tube amp (Pointz 6V6 MM), but I plan to build up some chipamps and perhaps a preamp like the Pass B1 at some point. Can these be used in interstage or input locations, in place of a capacitor? All the stuff I've found on transformer coupling seems to have high impedance secondaries. Or should I just try to sell these to somebody who's making a mic/recording setup? Thanks John

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11th January 2009, 08:19 PM	#2
Sjef diyAudio Member Join Date: Jan 2003 Location: Amsterdam	One thing you can do with them is to drive the preamp output into them, then put another pair on the power amp input and terminate it with 600Ohms and then you will have a perfect transmissionline between your pre and poweramp wich can be over 100 meters long if you want. Welcome to the world of Pro-Audio