cyamamot@nunki.usc.edu (Cliff Yamamoto) (06/04/89)
In article <3807@mit-amt> rdsnyder@mit-amt (Ross D. Snyder) writes: >Another solution would be to install isolation transformers in the RCA cords >between the receiver and amp. This would eliminate DC continuity in the >lines and would prevent ground loops through the audio signal lines. Use >50Kohm:50Kohm audio transformers of good quality (like with shielding). ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Can anyone point me to a manufacturer or distributor of these kinds of transformers? The only big transformer company I know of is Stancor (sp?) and I don't think they make audio transformers :( Cliff
rdsnyder@mit-amt (Ross D. Snyder) (06/08/89)
Here are some companies listed in EEM as selling audio transformers: ISL Products International Limited 235-P Robbins Lane, Syosset, NY 11791 516-937-3475 Magnetek Triad 1124 E. Franklin St., Huntington, IN 46750 219-356-6500 Microtran 145 E. Mineola Ave., Box 236, Valley Stream, NY 11582-0236 516-561-6050 (Their S130 10K-to-10K xfmr looks great, but probably isn't cheap) Pico Electronics, Inc. 453 N. MacQuesten Pkwy., Mt. Vernon, NY 10552 914-699-5514 (Their 23640/24640 priced $22.20/$25.89 (quan. 1-9) look identical to the Microtran S130-S/S130-SP. These are studio-grade double- mu-metal-shielded xfmrs; cheaper xfmrs are certainly available.) PolyPhase Instrument Co. 175 Commerce Drive, Fort Washington, PA 19034 800-221-POLY Power Magnetech 441 High St., Perth Amboy, NJ 08861 201-826-4700 Tamura Corp. of America 1150 Dominguez St., Carson, CA 90746-3518 213-638-1790 (Looks like a good selection, including studio-quality) United Transformer/OPT 300 Red School Lane, Phillipsburg, NJ 08865 201-454-2600 (Also looks like a good line) -Ross
heller@algol.crd.ge.com (aaron j heller) (06/10/89)
In article <3996@merlin.usc.edu> Cliff Yamamoto writes: >Can anyone point me to a manufacturer or distributor of these kinds of >transformers? The only big transformer company I know of is Stancor (sp?) >and I don't think they make audio transformers :( It is generally recognized that the best audio transformers are made by Deane Jensen. His address is: Jensen Transformers, Inc. 10735 Burbank Blvd. N. Hollywood, CA 90601 (213) 876-0059 I have also had good results with those made by Whirlwind: Whirlwind Music Inc. P.O. 1075 Rochester, NY 14603 Aaron Heller (heller@crd.ge.com uunet!crdgw1!heller)