RadioShack® Audio Output Transformer

Comments about RadioShack Audio Output Transformer:

A transformer spec should include all dimensions, the turns ratios, and the input/output impdedance as well as the frequency response and the weight.

Comments about RadioShack Audio Output Transformer:

Mix left and right channels together with 2, 1k resistors to one side of the 1k primary and ground the other. Connect the 8 ohm side to the XLR signal lines. Connect the shild to the XLR and the metal box containing the transformer, if metal. Do not connect the MP3 shield to the box, keep isolated. Works with walkmans, boom boxes, computers too, any headphone jack.

Comments about RadioShack Audio Output Transformer:

Interesting, the Web Page does not provide impedance specifications, but the package that I have in hand does. It is:

273-1380
Audio Output
Transformer
1K ohms center-tapped
to 8 ohms

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Comments about RadioShack Audio Output Transformer:

I've never had one of these transformers disappoint (well, except when I accidentally ripped the lead off...)

I've used these for all kinds of things. Powering neon lamps, small flouro lamps, audio phase splitting, and even a 400V B+ tube circuit (though it couldn't handle the current and got hot, it didn't arc over and I was able to reuse it.)

Comments about RadioShack Audio Output Transformer:

I used it on my telephone to create "Music on Hold". Very easy to do. Music goes on the 8 ohm audio winding and the other side is switched to the telephone line together with a load.

Comments about RadioShack Audio Output Transformer:

This is clearly the best quality miniature 8 ohm audio coupling transformer available. Not the cheap wax paper kind that have only one specific use. You can do amazing things with these little guys.

I use these for industrial/laboratory HV voltage inverter application with space limitation; 12-36 volt DC to 350 volt DC regulated boost converter to drive xenon strobe lamps.

8 ohm coil becomes the PWM controlled primary and the 1K is the secondary. Can charge a bank of capacitors to trigger the Xenon tubes nonstop for several minutes.

Other vendor transformers with similar size and rating would risk burnout and had internal arcing.

These RS units merely get lukewarm to the touch. No indications of dielectric breakdown or stress despite the alternative application. Quality windings as they are quiet.

Sure, I could have custom transformer and core designed and manufactured for my application. But this off the shelf part works fantastic for my purpose.

Hope that this product remains available for some time into future.

Comments about RadioShack Audio Output Transformer:

I first bought one of these transformers in 1989. They work great in the bionic ears circuit I made. I'm looking into building another circuit in 2009 again and I was very surprised to see that this transformer is still available. Thanks for making a great product.

Comments about RadioShack Audio Output Transformer:

Here is another use for it. I connected the primary (the one NOT center tapped; I'm new to this) to an audio source. I connected the secondary (center tapped side, used the outer wires) to an led. Using this setup, you can make an led flash with the music. I'm sure someone can find a use for this!

Comments about RadioShack Audio Output Transformer:

if you cut all but the blue and green lead it turns into a 500millihenry inductor.i used it as an inductor for a wah wah guitar effect pedal

Comments about RadioShack Audio Output Transformer:

using this product ina home made radio repeater interface with a COR Controller board. Needed impedance match speaker input to Mic H-z Of the controler board. Minimizes low audio levels. Use a .01 by pass cap to ground for audio path return. Because of low 300 hertz cut off the passage of PLL tone are not possible and must be manually injected after cor board.[@].com download Suitcase repeater ( it's free)