Objective Audio - 3M Information

Information on bias settings, transformer specifications and more

3M M79 Recommended Bias Settings A place to start for bias alignment.

3M M79 Head Damping Here are the effects of different head damping resistor values on a 3M M79 repro head.

Flux Loop Tests: Using the instructions given on Dale Manguen's website, epoxy, and InstaMorph moldable plastic, I have built flux loops for different sized heads. Shown below is one for a 2-inch 3M M79 head.

3M M79 Tests from 1982 Some interesting information from 1982 using a custom Saki Magnetics head for a 3M M79 1/2-inch 2 track.

3M M79 Input Transformer Specifications 3M Part Number 79059A008.

3M M79 Output Transformer Specifications 3M Part Number 79059A007.

3M M79 Isolating Flutter