Impedance Bridge

Circa 1960's

Saturday, April 05, 2014

Impedance bridge theory developed in 1830's and in the 1840's Charles Wheatstone improved it for accurate resistive/impedance testing. Note "magic eye" tube lower center.

Categories: Instruments Collection

Author: ephf

Edmonton Power Historical Foundation is a non-profit society dedicated to preserving the history of electric power in the City of Edmonton and the Province of Alberta, for the education and entertainment of current and future generations.

Edmonton Power Historical Foundation

Location:

We are located on the grounds of the Leduc West Antique Museum. Travel 5 km west of Leduc on Highway 39. Go north on Range Road 260 (Cohne Dale Road) for about 800 metres and the museum will be on your right. If you're coming from the west, Cohne Dale Road is 5km east of Highway 60.

Hours of operation 2025

2024 is in the books, and we are looking forward to an even better 2025. The Leduc Country Lights and the Leduc Christmas Convoy were both smashing successes, and the year ended with the last day of the lights on December 31. The EPHF Museum will open again for the Leduc West Spring Swap Meet in May 2025. If, however, you are interested in a private tour, just leave a message on this website and we'll do our best to arrange a time for you to come out.
Exhibition dates for 2025 are the Spring Swap Meet (combined with the Embers & Ice Pitmaster Challenge) on May 24 & 25, the Annual Exposition on July 19 & 20, and the Fall Harvest on September 6 & 7. Plus the Lesco Truck Show on September 19th and 20th. Watch this space!