Variable transformers for Germany and Europe
Variable Transformers up to 1730 Amps
http://www.variable-transformers.com

Variable Voltage Technology Ltd
design and manufacture of power supplies and magnetic wound components for electronic equipment
http://www.vvttransformers.co.uk

Investment Performance Measurement Calculator
Investment performance measurement calculator
http://www.performance-measurement.org/performance.php

Ashita Techno Enterprise
Leading manufacturers of transformers, Mumbai.
http://www.ashitatechno.com/

Staco Variable Transformers
Variacs - Staco Variable Transformers - full range of variable transformers to 600A.
http://www.variac.com/

Lenco Electronics, Inc.
Power transformers: Lenco specializes in a wide variety of custom transformers from isolation transformers, Ferro resonant transformers, Autotransformers, Three phase transformers, and Inductors. Lenco also offers the option of NEMA 1 enclosures with 7 available sizes, which are designed for three phase transformers, however modifications can be made to install single-phase transformers as well.
http://www.lenco-elect.com

Trafomatic
Trafomatic - production of toroidal transformers: push-pull triode, single - ended, ultralinear and pentode power tube configurations.
http://www.trafomatic.com/

Spiroid Gear Software
Consulting on gear design and development. Gear design software. Worm, worm face, hypoid, spur, helical gears, plastic gears, variable ratio rack.
http://www.zakgear.com/

American Association of Variable Star Observers
The American Association of Variable Star Observers: Professional and Amateur collection, research, and analyses of variable star observations.
http://www.aavso.org/

Italtras
Produzione di trasformatori a giorno, resinati da CS e basso profilo con marchio ENEC, trasformatori toroidali marchio cURus (UL+CSA), trasformatori in ferrite, trifase
http://www.italtras.com